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Author : Hassan Mahmoudi-Asl
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book The Effect of Cold Spray Coating on Fatigue Life of Magnesium Alloy, AZ31B. written by Hassan Mahmoudi-Asl and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hassan Mahmoudi-Asl
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.:/5 (18 download)
Download or read book The Effect of Residual Stress Induced by Cold Spray Coating on Fatigue Life of Magnesium Alloy, AZ31B written by Hassan Mahmoudi-Asl and published by . This book was released on 2011 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wrought magnesium alloys are considered attractive candidates for structural members in automotive and aerospace industries due to their high specific strength. Although new processes have helped to produce high purity magnesium alloys with higher resistance to corrosion, these alloys still need protection against corrosion when they are used in aggressive environments. Cold spray coating is one of the protective methods that are employed for this purpose. The similarity between cold spray coating and shot peening process poses the question whether cold spray coating can improve the fatigue strength in addition to providing corrosion protection. The objective of this research is to answer this question for the specific case of the coating of wrought magnesium alloy AZ31B with aluminum powder. This study comprises two parts. The first part characterises the residual stress induced by cold spray coating. This investigation employs both numerical and experimental methods. For the numerical study, the cold spray coating process has been simulated via ANSYS software classic package. The numerical results have been compared to experimental results from X-Ray Diffraction (XRD) stress measurement of a coated sample. For the second part of this research, the fatigue strength of as received, stress relieved, and stress relieved/coated specimens have been compared. Three groups of AZ31B specimens have been prepared and tested by rotating bending machine and their S-N curves have been prepared. Comparison of the results reveals that there is a considerable loss in fatigue strength of as received specimens after stress relief. This is due to the removal of compressive residual stress in the raw material induced by the extrusion process. Also, comparison of S-N curves of stress relieved and stress relieved/coated specimens shows fatigue life improvement after cold spray coating. The maximum improvement is 49 percent in the load of 120 MPa and the endurance limit has improved 9 percent.
Author : Mohammad Waheeb Diab
Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.:/5 (946 download)
Download or read book The Effect of Aluminum Cold Spray Coating on Corrosion Protection and Corrosion Fatigue Life Enhancement of Magnesium Alloy, AZ31B written by Mohammad Waheeb Diab and published by . This book was released on 2015 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium alloys are of a recent interest for the transportation industry due to their excellent properties such as high strength and low density which will save energy and reduce gas emission and it will also improve the vehicle performance. However due to their high chemical activity, magnesium and magnesium alloys have unsatisfactory corrosion resistance and high tendency to corrode in humid and aqueous environments. Although alloying elements provides some improvement in magnesium against corrosion, further protection for these alloys is needed against the corrosion in different corrosive environments. Aluminum powder cold spray is a new coating technology with very promising results in corrosion protection of magnesium alloys. The effect of applying pure aluminum cold spray coating on wrought AZ31B Mg alloy from the corrosion and corrosion fatigue point of view is studied. This research comprises two parts. The first part is studying the corrosion behavior of AZ31B cold spray coated and uncoated coupons by performing an accelerated corrosion testing in a corrosion chamber. The results for both types of coupons have been compared to each other. The second part of this research is to study the fatigue strength by rotating bending machine of stress relieved and stress relieved/coated specimens in salt water environment. S-N curves for the two groups of specimens were plotted. After the analysis and comparison of all the testing results, it was revealed that pure Al cold spray coating considerably improved the corrosion resistance of Mg alloy AZ31B in 5% NaCl fog environment. The microstructural analysis revealed the presence of some secondary phases which act as a cathode and accelerate the corrosion of the anode, Mg alloy. Comparison of corrosion-fatigue S-N curves of stress relieved and stress relieved/coated specimens show fatigue life reduction after cold spray coating to a maximum percentage of 87.6%. The reason for that is the fact that the pure Al powder has much lower ultimate tensile strength than Mg alloy AZ31B. This fact will lead to an earlier crack on the Al coating surface during the fatigue cycles, from which the electrolyte will penetrate to the Mg substrate and cause a localize corrosion and failure.
Author : Bahareh Marzbanrad
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (126 download)
Download or read book The Effect of Cold Spray Coating Parameters on the Residual Stress and Fatigue Performance of Magnesium Alloys written by Bahareh Marzbanrad and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming, dwindling fossil fuels, and the low efficiency of alternative energy sources such as batteries and solar panels compared to traditional carbon-based energy sources, have shifted the industrial design paradigm towards minimizing structural weight. In this scenario, employing low density grade metals is inevitable. Magnesium (Mg) alloys, such as AZ31B, are one of the lightest structural materials, and have been able to gain strong foothold in the industrial world due to their high "strength to weight ratio". However, the long-term performance of parts manufactured from Mg alloys are required for reliable structural applications. Hence, research on the methods to enhance the fatigue properties of Mg alloys is crucial. Surface treatment, particularly surface coating of manufactured parts with a thin layer of high fatigue strength material is considered a versatile approach to address fatigue shortcomings of Mg alloys. Cold gas dynamic spray is an emerging technology that deposit metal powder with a supersonic velocity on substrate in a solid-state. The nature of this technology (peening) promotes compressive residual stress and results in a refined grain structure, which reinforces a material's surface and prolong crack initiation, thus enhancing the fatigue performance of materials like AZ31B alloy. Among all potential candidates for coating Mg parts, aluminum alloys are one of the best, due to their low density and strong fatigue performance. Hence, in this research, cold spraying is employed to deposit a thin layer of Al7075 on AZ31B-H24 Mg substrates in order to improve their fatigue performance. The complexity of the cold spray process requires some in-depth study through in situ measurements. For this, fiber Bragg grating (FBG) sensors is employed for monitoring and assessing the thermo-mechanical behaviour of Mg alloy during cold-spray coating. Furthermore, the hole drilling, X-ray diffraction and in situ FBG sensors residual stress measurement techniques are used to explore the effect of processing parameters and thermal mismatch on the residual stress distribution of coated Mg samples. In addition, SEM, TEM, CT scanning tomography, micro indentation hardness, surface topography and roughness measurements are utilized to identify the physical and microstructural characteristics of the coating, interface and substrate. Based on the findings of this research, the common understanding that cold spray induced residual stresses are compressive is questioned. It is shown that the heat associated with the spraying, although much lower than melting temperature, can wash out the peening effect and result in tensile residual stress in the substrate. Hence, to customize the residual stress and for inducing compressive residual in the Mg substrate, the cold spray coating parameters were tuned to decrease the heat input to the substrate. Moreover, a cooling system was designed that increased heat transfer from the substrate during the coating process. Another major factor affecting the state of the residual stress is the thermal mismatch of the coating and the substrate materials. The detrimental effect of thermal mismatch between the Al7075 coating and AZ31B substrate on the residual stress of substrate and coating was addressed by adding an interlayer of zinc, which has a higher thermal expansion coefficient than the substrate and coating material. Zinc is successfully deposited, and its coating parameters were selected in a way that resulted in inducing compressive residual stress in the substrate, coating and the zinc interlayer. However, detail characterization of the zinc and AZ31B substrate reveals that intermetallic phases have formed at the interface. Therefore, despite the induced compressive residual stress, cracking at the zinc magnesium interface restricts the application of this interlayer. Two extreme coating conditions that lead to induced tensile and compressive residual stress in the Mg substrate have been selected for the rest of this research. The quality of the coating is examined by CT-scan, which demonstrates that the compressive samples have less porosity than the tensile samples, although the densities of both samples are above 99%. The physical and mechanical properties of the compressive samples, including hardness and surface roughness, have also been significantly improved compared to tensile samples. Finally, the fatigue performance of the two types of coated samples (tensile and compressive) is investigated revealing that the compressive samples demonstrate exceptional fatigue life in high cycle regime compared to the bare AZ31B samples with 130% life enhancement.
Author : Siavash Borhan Dayani
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (988 download)
Download or read book Improvement of Fatigue and Corrosion-fatigue Resistance of AZ31B Cast Alloy by Cold Spray Coating and Top Coating written by Siavash Borhan Dayani and published by . This book was released on 2017 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advancements in manufacturing of light-weight structures have caused high interest in industries toward magnesium alloys because of its excellent properties such as specific strength, low density, and fatigue strength. Application of magnesium in the vehicle structure saves energy and reduces gas emission which consequently improves the performance of the vehicle. Magnesium alloys have low corrosion resistance and high tendency to corrode in humid and aqueous environments. The results of recent research show that cold spray coating of pure aluminum powder results in significant improvement in magnesium corrosion. However when tested under cyclic loads, the coated samples developed surface cracks and delamination. Which lead to highly localized corrosion damages underneath of the cracks or any discontinuity in the components. The early cracking was attributed to the low fatigue resistance of pure aluminum. The results of two new approaches in enhancing the corrosion fatigue life of coated magnesium are presented in this thesis. First, an aluminium alloy coating powder with the higher fatigue strength was selected for coating. Al-7075 powder, with average particle size of twenty microns have successfully been coated on AZ31B samples with highly densed, low porosity coated layer. The coating was performed using nitrogen gas at 400oC temperature, and gas pressure of 200 psi. Electrostatic painting was then applied. Result of tests in the corrosive atmosphere of 3.5 % of NaCl solution as well as rotating fatigue test in corrosive environment will be presented. Improvement of fatigue resistance of cold spray coated samples and corrosion-fatigue resistance of cold spray coated, e-painted samples are studied in this thesis.
Author : Vineet V. Joshi
Publisher : Springer
ISBN 13 : 3030057895
Total Pages : 370 pages
Book Rating : 4.0/5 (3 download)
Download or read book Magnesium Technology 2019 written by Vineet V. Joshi and published by Springer. This book was released on 2019-02-13 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Magnesium Technology Symposium, the event on which this collection is based, is one of the largest yearly gatherings of magnesium specialists in the world. Papers represent all aspects of the field, ranging from primary production to applications to recycling. Moreover, papers explore everything from basic research findings to industrialization. Magnesium Technology 2019 covers a broad spectrum of current topics, including alloys and their properties; cast products and processing; wrought products and processing; forming, joining, and machining; corrosion and surface finishing; and structural applications. In addition, there is coverage of new and emerging applications.
Author : Jose Martin Herrera Ramirez
Publisher : Springer Nature
ISBN 13 : 3030481220
Total Pages : 215 pages
Book Rating : 4.0/5 (34 download)
Download or read book Unconventional Techniques for the Production of Light Alloys and Composites written by Jose Martin Herrera Ramirez and published by Springer Nature. This book was released on 2020-06-22 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses methods used in the synthesis of light alloys and composites for industrial applications. It begins with a broad introduction to virtually all aspects of the technology of light alloys and composite materials for aircraft and aerospace applications. The basic theory of fiber and particle reinforcements; light metallic material characteristics and composite systems; components forms, and manufacturing techniques and processes are discussed. The book then progresses to describe the production of alloys and composites by unconventional techniques, such as powder metallurgy, sandwich technique, severe plastic deformation, additive manufacturing, and thermal spray, making it appropriate for researchers in both academia and industry. It will be of special interest to aerospace engineers. Provides a broad introduction to the technology used in manufacturing light alloys and composite materials; Describes the current technologies employed in synthesizing light alloys made from advanced materials; Focuses on unconventional techniques used to produce light alloys and composites in aerospace applications.
Author : Hang Z. Yu
Publisher : John Wiley & Sons
ISBN 13 : 3527839348
Total Pages : 421 pages
Book Rating : 4.5/5 (278 download)
Download or read book Solid-State Metal Additive Manufacturing written by Hang Z. Yu and published by John Wiley & Sons. This book was released on 2024-04-16 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-State Metal Additive Manufacturing Timely summary of state-of-the-art solid-state metal 3D printing technologies, focusing on fundamental processing science and industrial applications Solid-State Metal Additive Manufacturing: Physics, Processes, Mechanical Properties, and Applications provides detailed and in-depth discussion on different solid-state metal additive manufacturing processes and applications, presenting associated methods, mechanisms and models, and unique benefits, as well as a detailed comparison to traditional fusion-based metal additive manufacturing. The text begins with a high-level overview of solid-state metal additive manufacturing with an emphasis on its position within the metal additive manufacturing spectrum and its potential for meeting specific demands in the aerospace, automotive, and defense industries. Next, each of the four categories of solid-state additive technologies—cold spray additive manufacturing, additive friction stir deposition, ultrasonic additive manufacturing, and sintering-based processes—is discussed in depth, reviewing advances in processing science, metallurgical science, and innovative applications. Finally, the future directions of these solid-state processes, especially the material innovation and artificial intelligence aspects, are discussed. Sample topics covered in Solid-State Metal Additive Manufacturing include: Physical processes and bonding mechanisms in impact-induced bonding and microstructures and microstructural evolution in cold sprayed materials Process fundamentals, dynamic microstructure evolution, and potential industrial applications of additive friction stir deposition Microstructural and mechanical characterization and industrial applications of ultrasonic additive manufacturing Principles of solid-state sintering, binder jetting-based metal printing, and sintering-based metal additive manufacturing methods for magnetic materials Critical issues inherent to melting and solidification, such as porosity, high residual stress, cast microstructure, anisotropic mechanical properties, and hot cracking Solid-State Metal Additive Manufacturing is an essential reference on the subject for academic researchers in materials science, mechanical, and biomedicine, as well as professional engineers in various manufacturing industries, especially those involved in building new additive technologies.
Author : The Minerals, Metals & Materials Society
Publisher : Springer
ISBN 13 : 3319725262
Total Pages : 961 pages
Book Rating : 4.3/5 (197 download)
Download or read book TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings written by The Minerals, Metals & Materials Society and published by Springer. This book was released on 2018-02-03 with total page 961 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection features papers presented at the 147th Annual Meeting & Exhibition of The Minerals, Metals & Materials Society.
Author : T.S.N. Sankara Narayanan
Publisher : Elsevier
ISBN 13 : 1782420827
Total Pages : 381 pages
Book Rating : 4.7/5 (824 download)
Download or read book Surface Modification of Magnesium and its Alloys for Biomedical Applications written by T.S.N. Sankara Narayanan and published by Elsevier. This book was released on 2015-01-08 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface modification of magnesium and its alloys for biomedical applications: Biological interactions, mechanical properties and testing, the first of two volumes, is an essential guide on the use of magnesium as a degradable implant material. Due to their excellent biocompatibility and biodegradability, magnesium based degradable implants provide a viable option for the permanent metallic implants. This volume focuses on the fundamental concepts of surface modification of magnesium, its biological interactions, mechanical properties and, in vitro and in vivo testing. The contents of volume 1 is organized and presented in three parts. Part 1 reviews the fundamental aspects of surface modification of magnesium, including surface design, opportunities, challenges and its role in revolutionizing biodegradable biomaterials. Part 2 addresses the biological and mechanical properties covering an in vivo approach to the bioabsorbable behavior of magnesium alloys, mechanical integrity and, the effects of amino acids and proteins on the performance of surface modified magnesium. Part 3 delves in to testing and characterization, exploring the biocompatibility and effects on fatigue life alongside the primary characteristics of surface modified magnesium. All chapters are written by experts, this two volume series provides systematic and thorough coverage of all major modification technologies and coating types of magnesium and its alloys for biomedical applications. Expert analysis of the fundamentals in surface modification of magnesium and its alloys for biomedical applications Includes biological interactions and mechanical properties Focuses on testing and characterisation, as well as biocompatibility
Author : Liqiang Wang
Publisher : Frontiers Media SA
ISBN 13 : 2832505503
Total Pages : 158 pages
Book Rating : 4.8/5 (325 download)
Download or read book Metallic Alloys in Medical Applications written by Liqiang Wang and published by Frontiers Media SA. This book was released on 2022-11-14 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anatolii Papyrin
Publisher : Elsevier
ISBN 13 : 008046548X
Total Pages : 341 pages
Book Rating : 4.0/5 (84 download)
Download or read book Cold Spray Technology written by Anatolii Papyrin and published by Elsevier. This book was released on 2006-10-04 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of this book is Cold Spray technology. Cold Spray is a process of applying coatings by exposing a metallic or dielectric substrate to a high velocity (300 to 1200 m/s) jet of small (1 to 50 μm) particles accelerated by a supersonic jet of compressed gas. This process is based on the selection of the combination of particle temperature, velocity, and size that allows spraying at the lowest temperature possible. In the Cold Spray process, powder particles are accelerated by the supersonic gas jet at a temperature that is always lower than the melting point of the material, resulting in coating formation from particles in the solid state. As a consequence, the deleterious effects of high-temperature oxidation, evaporation, melting, crystallization, residual stresses, gas release, and other common problems for traditional thermal spray methods are minimized or eliminated. This book is the first of its kind on the Cold Spray process. Cold Spray Technology covers a wide spectrum of various aspects of the Cold Spray technology, including gas-dynamics, physics of interaction of high-speed solid particles with a substrate as well as equipment, technologies, and applications. Cold Spray Technology includes the results of more than 20 years of original studies (1984-2005) conducted at the Institute of Theoretical and Applied Mechanics of the Siberian Division of the Russian Academy of Science, as well as the results of studies conducted at most of the research centres around the world. The authors' goal is threefold. The first goal is to explain basic principles and advantages of the Cold Spray process. The second goal is, to give practical information on technologies and equipment. The third goal is to present the current state of research and development in this field over the world. The book provides coverage and data that will be of interest for users of Cold Spray technology as well as for other coating experts. At the present time the Cold Spray method is recognized by world leading scientists and specialists. A wide spectrum of research is being conducted at many research centres and companies in many countries. New approach to spray coatings Results are exceptionally pure coatings Low spray temperature without degradation of powder and substrate materials High productivity, high deposition efficiency High operational safety because of absence of high temperature gas jets, radiation and explosive gases Excellent thermal and electrical conductivity Wide spectrum of applications because of important advantages of the process
Author : Pasquale Cavaliere
Publisher : Springer
ISBN 13 : 3319671839
Total Pages : 566 pages
Book Rating : 4.3/5 (196 download)
Download or read book Cold-Spray Coatings written by Pasquale Cavaliere and published by Springer. This book was released on 2017-11-08 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book combines the contributions of experts in the field to describe the behavior of various materials, micromechanisms involved during processing, and the optimization of cold-spray technology. It spans production, characterization, and applications including wear resistance, fatigue, life improvement, thermal barriers, crack repair, and biological applications. Cold spray is an innovative coating technology based on the kinetic energy gained by particles sprayed at very high pressures. While the technique was developed in the 1990s, industrial and scientific interest in this technology has grown vastly in the last ten years. Recently, many interesting applications have been associated with cold-sprayed coatings, including wear resistance, fatigue life improvement, thermal barriers, biological applications, and crack repair. However, many fundamental aspects require clarification and description.
Author : M. M. Avedesian
Publisher : ASM International
ISBN 13 : 9780871706577
Total Pages : 336 pages
Book Rating : 4.7/5 (65 download)
Download or read book ASM Specialty Handbook written by M. M. Avedesian and published by ASM International. This book was released on 1999-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ASM Handbook is the most comprehensive collection of engineering information on this important structural material published in the last sixty years. Prepared with the cooperation of the International Magnesium Association, it presents the current industrial practices and provides information and data about the properties and performance of magnesium alloys. Materials science and engineering are covered, including processing, properties, and commercial uses.
Author : C. M. Kay
Publisher :
ISBN 13 : 9781627080965
Total Pages : 324 pages
Book Rating : 4.0/5 (89 download)
Download or read book High Pressure Cold Spray written by C. M. Kay and published by . This book was released on 2016-06 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a highly practical and useful ""go-to"" resource that presents an in-depth look at the high pressure cold spray process and describes applications in various industries. Cold spray continues to be the fastest developing spray technology over the last decade, and a significant number of scientists, engineers, and technologists are joining the cold spray community around the globe. The technology is relatively young and work is being simultaneously pursued in universities, research centers, and in many high tech industries. As this novel technology spreads quickly into many new application areas, there is a large need for an authoritative source of information. This new book addresses this need and will be indispensable to universities, libraries, and those involved in thermal spray. It presents baseline information on design and modeling, materials science of engineered coatings, and specific applications in various high tech industries, and is also a hands-on resource for cold spray operators.
Author : Julio Villafuerte
Publisher : Springer
ISBN 13 : 3319167723
Total Pages : 435 pages
Book Rating : 4.3/5 (191 download)
Download or read book Modern Cold Spray written by Julio Villafuerte and published by Springer. This book was released on 2015-08-24 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the current state of the art of the novel cold spray process. Cold spray is a solid state metal consolidation process, which allows engineers to tailor surface and shape properties by optimizing process parameters, powder characteristics and substrate conditions for a wide variety of applications that are difficult or impossible by other techniques. Readers will benefit from this book's coverage of the commercial evolution of cold spray since the 1980's and will gain a practical understanding of what the technology has to offer.
Author : Markus G. R. Sause
Publisher : Springer Nature
ISBN 13 : 3030721922
Total Pages : 292 pages
Book Rating : 4.0/5 (37 download)
Download or read book Structural Health Monitoring Damage Detection Systems for Aerospace written by Markus G. R. Sause and published by Springer Nature. This book was released on 2021 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.
