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Author : Jun Hu
Publisher :
ISBN 13 : 9783330316270
Total Pages : pages
Book Rating : 4.3/5 (162 download)
Download or read book Characterization and Modeling of Advanced High Strength Steels written by Jun Hu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen Roy Cluff
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (116 download)
Download or read book Characterization and Modeling of the Martensite Transformation in Advanced High-strength Steels written by Stephen Roy Cluff and published by . This book was released on 2019 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple studies on the microstructures of advanced high-strength steels are presented here that seek to add to the already substantial body of knowledge on martensite in steel. These studies seek to gain additional insight into the role of that the martensite transformation has on the observed mechanical properties of modern steels.
Author : Nikky Pathak
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (13 download)
Download or read book Characterization and Modeling of Sheared Edge Failure in Advanced High Strength Steel written by Nikky Pathak and published by . This book was released on 2018 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edge failure is one of the major problems associated with forming of advanced high strength steels (AHSS) such as dual-phase (DP) steels. The development of ferritic-bainitic steels such as complex-phase (CP) steels have improved the performance of AHSS in industrial forming operations and is gaining attention in academia as well as industry. As a result, there is an interest in developing numerical techniques to predict sheared edge failure in forming simulations and optimize forming operations in the automotive industry for vehicle lightweighing. The primary objective of this thesis is to examine the influence of shearing on edge stretchability and damage evolution in two different grades of AHSS: CP and DP steels and develop damage-based models to predict sheared edge failure. The stretch-flangeability of DP and CP steels were evaluated using a hole expansion test for different edge conditions to isolate to the influence of a range of factors thought to influence edge formability. The results demonstrate that work hardening and void damage at the sheared edge govern formability while the sheared surface quality plays a minor or secondary role. A comparison of the edge stretching limits of DP and CP steels demonstrates the advantages of a ferritic-bainitic microstructure for forming operations with severe local deformation as in a stretch-flanging operation. The failure mechanisms in the CP and DP steels were systematically characterized by interrupting hole tension tests at different strain levels. Scanning electron microscope (SEM) analysis conducted on interrupted hole tension specimens revealed the ductile failure mechanism as being operative in the CP and DP steels for the different edge conditions and microstructures. Damage histories were developed from the interrupted samples using optical microscopy and quantitative stereology measurement of void nucleation, growth and coalescence, paired with in situ digital image correlation (DIC) strain measurements during the mechanical testing. The trend of damage evolution differs for the sheared edge in contrast with the reamed edge because the shearing process alters the microstructure in the shear affected zone (SAZ) by introducing work-hardening and damage behind the sheared edge. Two independent experimental techniques were applied to characterize the residual strain distribution within the shear-affected zone for CP800 and DP780 steels based on (a) the tendency of grains to orient in the direction of shearing and (b) work-hardening introduced within the deformed shear zone. The first technique was developed by applying finite strain theory to calculate the equivalent strain from microstructural measurements of grain rotation. The second strain measurement technique also involved using the same interrupted shear tests and DIC strains followed by microhardness measurements to develop a correlation between the equivalent strain and hardness. These techniques were applied to estimate the strain-distribution behind the sheared edge generated during the shearing process. The influence of stress-state on micro-void nucleation was evaluated experimentally for the CP and DP steels and a stress-state dependent nucleation model was developed. Stress state was varied by considering four specimen geometries: the equi-biaxial Nakazima test, a plane strain v-bend test, a central hole tension test for uniaxial loading and a simple shear test. 3D micro-tomography and quantitative stereology measurement of void nucleation paired with in situ digital image correlation (DIC) strain measurement was conducted on the interrupted samples to quantify damage as a function of equivalent strain. The influence of stress-state on damage evolution was observed for both materials with very little void nucleation under shear deformation but extensive void damage under biaxial tension. Of particular interest, Lode parameter-dependency of void nucleation was identified and a stress-state dependent nucleation model is proposed by introducing a nucleation strain surface as a function of stress-triaxiality and Lode parameter using a modified form of Chu and Needleman nucleation criterion. The critical damage parameters controlling the ductile failure process were identified from the void histories determined using 3D tomography to develop a micromechanics-based fracture model. An uncoupled anisotropic damage-based fracture model was formulated within an LS-DYNA user-defined material subroutine. The pre-strain and damage introduced during the shearing process were mapped onto finite element models of edge formability. The proposed model was validated for the hole tension experiments and found to predict failure efficiently and accurately for the CP800 and DP780 alloys with a reamed or sheared edge conditions.
Author : Tapas Kumar Roy
Publisher : Springer
ISBN 13 : 9811078920
Total Pages : 217 pages
Book Rating : 4.8/5 (11 download)
Download or read book Advanced High Strength Steel written by Tapas Kumar Roy and published by Springer. This book was released on 2018-02-09 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises select proceedings of the AHSS 2017 conference. AHSS is an instrumental event in creating a platform for exchanging recent thoughts and results among a selective group of researchers working in the area of steel science and engineering. Twenty two selected papers have been included in this volume. This book will serve as a reference to many practitioners and researchers working in the areas of steel strength, characterization, and applications.
Author : Mohamed Goune
Publisher : John Wiley & Sons
ISBN 13 : 1789451221
Total Pages : 420 pages
Book Rating : 4.7/5 (894 download)
Download or read book New Advanced High Strength Steels written by Mohamed Goune and published by John Wiley & Sons. This book was released on 2024-01-11 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, significant developments have been made to increase the mechanical strength of steels in order to reduce the overall weight of structures, particularly in motor vehicles. Depending on the application, the increase in strength should not be at the expense of forming and in-use properties. The development of ultra-high strength steels requires a search for new trade-offs between these properties in order to optimize the final microstructure. New Advanced High Strength Steels analyzes the interactions between tensile mechanical properties and properties such as work hardening, anisotropy, resistance to rupture, fatigue life, corrosion resistance, crashworthiness, edge retention, hydrogen resistance and weldability. It also examines the links between the microstructural parameters of high-strength steels and the properties mentioned above. It highlights the metallurgical developments that have been necessary for the emergence of these new generations of steels. The book concludes with a look ahead to future developments in ultra-high strength steels
Author : Jingwei Zhao
Publisher : CRC Press
ISBN 13 : 1498730345
Total Pages : 644 pages
Book Rating : 4.4/5 (987 download)
Download or read book Rolling of Advanced High Strength Steels written by Jingwei Zhao and published by CRC Press. This book was released on 2017-07-12 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced high strength steels (AHSSs) for auto-making are primarily produced by rolling, plus heat treatment technologies if necessary. However, due to the metallurgical complexity of AHSSs, it is impossible to roll all of the AHSS grades in a rolling mill with the same rolling technology. Each of AHSSs has unique applications in vehicles, and specified rolling technologies are required to produce high quality AHSS products where they might be the best employed to meet performance demands of the automotive parts. Such background has prompted the publication of this scholarly book in the area of rolling of AHSSs with a purpose of providing readers with a valuable technical document that can be used in the research and development of AHSSs for automotive and other manufacturing industries. With contributors from USA, Germany, Poland, Italy, Spain, Austria, Australia, China, India and Iran, the book highlights the latest advances in rolling technologies of AHSSs. It focuses on the theory, simulation and practice of the rolling of AHSSs: The book introduces the history, types and advances of AHSSs and their processes; proposes new theory that is applicable to the rolling of AHSSs, presents mathematical and numerical modelling of AHSSs in rolling; covers thermomechanical processing technologies of AHSSs; provides case studies on the rolling practice of the most popular AHSSs and includes other rolling-related technologies of AHSSs. The book will be useful for both theoretical and applied research aimed at AHSSs rolling technologies, and will be a scientific and valuable literature for the metallurgists, engineers, materials scientists, academics and graduate students who are studying and working with AHSSs and their rolling technologies worldwide.
Author : Alan Thompson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book High Strain Rate Characterization of Advanced High Strength Steels written by Alan Thompson and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bassam Abdullah Mohammed
Publisher :
ISBN 13 : 9780355523362
Total Pages : 217 pages
Book Rating : 4.5/5 (233 download)
Download or read book Characterization and Multiscale Crystal Plasticity Modeling of Multiphase Advanced High Strength Steel written by Bassam Abdullah Mohammed and published by . This book was released on 2017 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mélanie Ollat
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (16 download)
Download or read book Characterization and Modeling of Microstructural Evolutions During the Thermal Treatment of Cold-rolled Dual-Phase Steels written by Mélanie Ollat and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-Phase steels (DP) are one of the most used Advanced High Strength Steels (AHSS) for automotive applications because they present good strength/ductility compromise and they adapt to number of industrial constraints (low price, shaping, welding, coating etc.). Nowadays, the development of DP steels seems to be promising and sustainable for the body-in-white structure. The typical ferrite-martensite microstructure, characteristic of DP steels, are obtained by a thermal treatment composed of different stages during which metallurgical evolutions occur. Major difficulties of their processing are due to the fact that (i) microstructural evolution kinetics are influenced by cycle parameters (heating rate, annealing temperature etc.), (ii) different stages are interconnected and (iii) some microstructural evolutions may overlap and, therefore, interact. This PhD-work aimed at getting a better understanding of microstructural evolutions during the thermal cycle of DP steel and, namely, the influence of cycle parameters. Different microstructural evolutions occurring during the thermal cycle were first characterized coupling different experimental techniques (dilatometry, hardness, TPE etc.) and with a particular protocol in order to decorrelate overlapping and interconnected phenomena. As example, two major evolutions occurring during the intercritical annealing were first studied individually ((1) recrystallization was investigated below austenite formation temperature and (2) austenite formation was investigated on prior recrystallized steels) before investigated cold-rolled steel case where recrystallization and austenite formation overlap. The study was then attached to develop some predictive tools to describe microstructural evolutions based on phenomenological approaches (JMAK law) towards more physical based models (mixed-mode, diffusive models). A particular care was attached to discuss on model reliability, versatility, strengths and limitations.
Author : Mélanie Ollat
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (113 download)
Download or read book Characterization and Modeling of Microstructural Evolutions During the Thermal Treatment of Cold-rolled Dual-Phase Steels written by Mélanie Ollat and published by . This book was released on 2019 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-Phase steels (DP) are one of the most used Advanced High Strength Steels (AHSS) for automotive applications because they present good strength/ductility compromise and they adapt to number of industrial constraints (low price, shaping, welding, coating etc.). Nowadays, the development of DP steels seems to be promising and sustainable for the body-in-white structure. The typical ferrite-martensite microstructure, characteristic of DP steels, are obtained by a thermal treatment composed of different stages during which metallurgical evolutions occur. Major difficulties of their processing are due to the fact that (i) microstructural evolution kinetics are influenced by cycle parameters (heating rate, annealing temperature etc.), (ii) different stages are interconnected and (iii) some microstructural evolutions may overlap and, therefore, interact. This PhD-work aimed at getting a better understanding of microstructural evolutions during the thermal cycle of DP steel and, namely, the influence of cycle parameters. Different microstructural evolutions occurring during the thermal cycle were first characterized coupling different experimental techniques (dilatometry, hardness, TPE etc.) and with a particular protocol in order to decorrelate overlapping and interconnected phenomena. As example, two major evolutions occurring during the intercritical annealing were first studied individually ((1) recrystallization was investigated below austenite formation temperature and (2) austenite formation was investigated on prior recrystallized steels) before investigated cold-rolled steel case where recrystallization and austenite formation overlap. The study was then attached to develop some predictive tools to describe microstructural evolutions based on phenomenological approaches (JMAK law) towards more physical based models (mixed-mode, diffusive models). A particular care was attached to discuss on model reliability, versatility, strengths and limitations.
Author : Taylan Altan
Publisher : ASM International
ISBN 13 : 1615039880
Total Pages : 381 pages
Book Rating : 4.6/5 (15 download)
Download or read book Sheet Metal Forming written by Taylan Altan and published by ASM International. This book was released on 2012 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical and comprehensive reference gives the latest developments on the design of sheet forming operations, equipment, tooling, and process modeling. Individual chapters cover all major sheet forming processes such as blanking, bending, deep drawing, and more. Process modeling using finite element analysis is described in one chapter and discussed in all appropriate chapters. Other chapters cover sensors and die materials, which are critical for practical sheet forming applications. Other topics include relatively new technologies, such as warm forming of magnesium and aluminum alloys, forming of advanced high-strength steels (AHSS), and hot stamping. Chapters also address special sheet forming operations, like spinning, incremental forming, and mechanical joining, and processes related to sheet forming, such as sheet and tube hydroforming, roll forming, and high-velocity forming.
Author : Ma Mingtu
Publisher : World Scientific
ISBN 13 : 9813277998
Total Pages : 632 pages
Book Rating : 4.8/5 (132 download)
Download or read book Advanced High Strength Steel And Press Hardening - Proceedings Of The 4th International Conference On Advanced High Strength Steel And Press Hardening (Ichsu2018) written by Ma Mingtu and published by World Scientific. This book was released on 2018-12-14 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: The automotive industry requirements for vehicle weight reduction, weight containment, improved part functionality and passenger safety have resulted in the increased use of steel grades with a fully martensitic microstructure. These steel grades are essential to improve the anti-intrusion resistance of automotive body parts and the related passenger safety during car collisions. Standard advanced high strength steel (AHSS) grades are notoriously difficult to be formed by cold stamping; they are characterized by elastic springback, poor stretch flangeability and low hole expansion ratios. Hot stamping has therefore received much attention recently as an alternative technology to produce AHSS automotive parts.In this book, selected articles from the Fourth International Conference on Advanced High Strength Steel and Press Hardening held on August 20-22th, 2018 in Hefei, China, are compiled. It focuses on AHSS for the development of press hardening of high performance sheet metal for lightweight vehicle, advanced digital manufacturing technology, as well as the physical metallurgy principles of the hot stamping process.Aiming at the process design and industrial application for hot stamping of press hardened steel and high strength aluminium alloy sheet, the effect of temperature and strain rate on the formability and mechanical properties of the products is discussed. In addition, more practical cases are provided concerning accurate modelling and multi-physics coupling simulation of the hot stamping process. Furthermore, the influence of tool design on forming process, more precise process control strategies to increase production efficiency, and the improvement of hot stamping equipment by advanced design methods will also be presented.
Author : Jamie Kimberley
Publisher : Springer
ISBN 13 : 3319950894
Total Pages : 345 pages
Book Rating : 4.3/5 (199 download)
Download or read book Dynamic Behavior of Materials, Volume 1 written by Jamie Kimberley and published by Springer. This book was released on 2018-10-27 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1 of the Proceedings of the 2018 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the first volume of eight from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Experimental Mechanics, including papers on: Synchrotron Applications/Advanced Dynamic Imaging Quantitative Visualization of Dynamic Events Novel Experimental Techniques Dynamic Behavior of Geomaterials Dynamic Failure & Fragmentation Dynamic Response of Low Impedance Materials Hybrid Experimental/Computational Studies Shock and Blast Loading Advances in Material Modeling Industrial Applications
Author :
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (727 download)
Download or read book Formability Characterization of a New Generation High Strength Steels written by and published by . This book was released on 2003 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced high strength steels (AHSS) are being progressively explored by the automotive industry all around the world for cost-effective solutions to accomplish vehicle lightweighting, improve fuel economy, and consequently reduce greenhouse emissions. Because of their inherent high strength, attractive crash energy management properties, and good formability, the effective use of AHSS such as Duel Phase and TRIP (Transformation Induced Plasticity) steels, will significantly contribute to vehicle lightweighting and fuel economy. To further the application of these steels in automotive body and structural parts, a good knowledge and experience base must be developed regarding the press formability of these materials. This project provides data on relevant intrinsic mechanical behavior, splitting limits, and springback behavior of several lots of mild steel, conventional high strength steel (HSS), advanced high strength steel (AHSS) and ultra-high strength steel (UHSS), supplied by the member companies of the Automotive Applications Committee (AAC) of the American Iron and Steel Institute (AISI). Two lots of TRIP600, which were supplied by ThyssenKrupp Stahl, were also included in the study. Since sheet metal forming encompasses a very diverse range of forming processes and deformation modes, a number of simulative tests were used to characterize the forming behavior of these steel grades. In general, it was found that formability, as determined by the different tests, decreased with increased tensile strength. Consistant with previous findings, the formability of TRIP600 was found to be exceptionally good for its tensile strength.
Author : Mahmoud Y. Demeri
Publisher : ASM International
ISBN 13 : 1627080058
Total Pages : 312 pages
Book Rating : 4.6/5 (27 download)
Download or read book Advanced High-Strength Steels written by Mahmoud Y. Demeri and published by ASM International. This book was released on 2013-08-01 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the types, microstructures and attributes of AHSSAlso reviews the current and future applications, the benefits, trends and environmental and sustainability issues.
Author : Katia Mocellin
Publisher : Springer Nature
ISBN 13 : 3031409205
Total Pages : 726 pages
Book Rating : 4.0/5 (314 download)
Download or read book Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity written by Katia Mocellin and published by Springer Nature. This book was released on 2023-08-19 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in the field of metal forming, as presented by leading international researchers and engineers at the 14th International Conference on Technology of Plasticity (ICTP), held in Mandelieu-La Napoule, France on September 24-29, 2023. It covers a diverse range of topics such as manufacturing processes & equipment, materials behavior and characterization, microstructure design by forming, surfaces & interfaces, control & optimization, green / sustainable metal forming technologies, digitalization & AI in metal forming, multi-material processing, agile / flexible metal forming processes, forming of non-metallic materials, micro-forming and luxury applications. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster multidisciplinary collaboration among different specialists.
Author : Yisheng Zhang
Publisher : World Scientific
ISBN 13 : 9813207310
Total Pages : 579 pages
Book Rating : 4.8/5 (132 download)
Download or read book Advanced High Strength Steel And Press Hardening - Proceedings Of The 3rd International Conference On Advanced High Strength Steel And Press Hardening (Ichsu2016) written by Yisheng Zhang and published by World Scientific. This book was released on 2017-03-03 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings brings together seventy seven selected papers presented at the 3rd International Conference on Advanced High Strength Steel and Press Hardening (ICHSU2016), which was held in Xi’an, China, during August 25-27, 2016.In this rapid growing market in advanced high strength steel and press hardening, in particularly demand from automotive industry and sustainability community to develop light-weight materials for Body in white or BIW, has motivated us to organize ICHSU2016, soon after the successful conclusion of our ICHSU2015 last year to encourage experts all over the world to get together again to exchange note and ideas as how to move the R&D in press hardening technology forward in the new era.The purpose of holding ICHSU2016 is to satisfy the increasingly urgent requirement of reducing the weight of vehicle structures and increasing passenger safety. This conference arouses great interests and attentions from domestic and foreign researchers in hot stamping field, of the articles accepted, covering almost all the current topics of advanced high strength steel and press hardening technology, which includes materials & testing, modeling & simulation, process design, tribology & tools, equipment and product properties.
