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Comparison Of Mechanical Suppression By Shot Peening And Low Plasticity Burnishing To Mitigate Scc And Corrosion Fatigue Failures In 300m Landing Gear Steel
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Book Synopsis Comparison of Mechanical Suppression by Shot Peening and Low Plasticity Burnishing to Mitigate SCC and Corrosion Fatigue Failures in 300M Landing Gear Steel by :
Download or read book Comparison of Mechanical Suppression by Shot Peening and Low Plasticity Burnishing to Mitigate SCC and Corrosion Fatigue Failures in 300M Landing Gear Steel written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: 300M steel is widely used in aircraft landing gear because of its unique combination of strength and fracture toughness, but is vulnerable to foreign object damage (FOD), corrosion fatigue, and stress corrosion cracking (SCC) failures with potentially catastrophic consequences. The fatigue, corrosion fatigue in salt water, and SCC performance of LPB processed 300M steel was compared with shot peened (SP) and low stress ground (LSG) conditions. LPB, with and without simulated FOD, produced deep residual compression that dramatically improved both the HCF and corrosion fatigue strength. The fatigue strength of LSG and SP treated surfaces was drastically reduced by salt and FOD exposure with no discernible endurance limit for corrosion fatigue conditions. SCC testing of LPB treated landing gear sections at 1030 to 2270 MPa (150 to 180 ksi) static loads was terminated after 1500 hrs without failure, compared to failure in as little as 13 hours without treatment. Mechanistically, the deep compressive surface residual stresses from LPB treatment mitigated both the individual and synergistic effects of corrosion fatigue and FOD. LPB also reduced the surface stress well below the SCC threshold for 300M, even under high tensile applied stresses, effectively suppressing the SCC failure mechanism.
Book Synopsis Techniques to Evaluate Long-Term Aging of Systems by : Paul Wagner
Download or read book Techniques to Evaluate Long-Term Aging of Systems written by Paul Wagner and published by RIAC. This book was released on 2011-03 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this report is to highlight the impact of long-term aging effects on parts, assemblies and equipments by investigating characteristics of aging as they impact specific material classes.
Book Synopsis Mitigation of SCC and Corrosion Fatigue Failures in 300M Landing Gear Steel Using Mechanical Suppression by :
Download or read book Mitigation of SCC and Corrosion Fatigue Failures in 300M Landing Gear Steel Using Mechanical Suppression written by and published by . This book was released on 2004 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: 300M steel is widely used in landing gear because of its unique combination of ultrahigh strength with high fracture toughness. However, 300M is vulnerable to both corrosion fatigue and stress corrosion cracking (SCC) failures with catastrophic consequences for aircraft landing gear. Plating and shot peening surface treatments currently used to extend life are only partly effective. A surface treatment is needed that will mitigate foreign object damage (FOD), corrosion fatigue and stress corrosion cracking. This paper describes the use of low plasticity burnishing (LPB) to mechanically suppress stress sensitive corrosion failure mechanisms in 3.5% salt solution. The fatigue and corrosion fatigue performance of LPB processed 300M steel was compared with shot peened (SP) and low stress ground (LSG) conditions. LPB produced residual compression to a depth of 1.27 mm (0.050 in.), and shot peening only 0.127 mm (0.005 in.), an order of magnitude less. LPB treatment dramatically improved both the HCF performance and corrosion fatigue strength, with and without simulated FOD. The corrosion fatigue strengths of LSG and SP surfaces decreased dramatically, to only 20% and 50%, respectively, of the baseline strength, with no discernible endurance limit behavior under corrosion fatigue conditions. The fatigue behavior was even worse with FOD, simulated with a 0.5 mm (0.020 in.) deep EDM notch, both in air and exposed to salt. In contrast, LPB treated specimens with FOD exhibited a definite endurance limit of 1035 MPa (150 ksi) even under corrosion fatigue conditions. SCC testing of LPB treated landing gear sections at 1030 to 2270 MPa (150 to 180 ksi) static loads was terminated after 1500 hrs without failure, compared to failure in as little as 13 hours without treatment.
Book Synopsis Overview of Low Plasticity Burnishing for Mitigation of Fatigue Damage Mechanisms by :
Download or read book Overview of Low Plasticity Burnishing for Mitigation of Fatigue Damage Mechanisms written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface enhancement technologies such as shot peening (SP), laser shock peening (LSP), and low plasticity burnishing (LPB) can provide substantial fatigue life improvement. However, to be effective, the compressive residual stresses that increase fatigue strength must be retained in service. LPB provides thermally stable compression and can be performed in conventional machine shop environments on CNC machine tools. LPB enables the extension of component service lives fatigue limited by various damage mechanisms including foreign object damage (FOD), corrosion fatigue, pitting, and fretting. The thermal and mechanical stability of the compressive layer are briefly reviewed. The LPB process, tooling, and control system are briefly described. Four representative applications are presented: thermal stability in IN718, improved damage tolerance in Ti-6-4 fan blades, mitigation of fretting fatigue damage in Ti-6-4, and improved corrosion fatigue in 17-4PH stainless steel.
Download or read book Shot Peening written by Kailash Chaudhary and published by Educreation Publishing. This book was released on with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the advantages of shot peening process in increasing fatigue strength of components subjected to high alternating stresses. The fields of application for shot peening include all metallic components, which are subject to fluctuating and fatigue loads. Additional advantages of using shot peening include design of lighter weight and lower cost components, prevention of stress corrosion, formation of lubrication pockets and compensation of manufacturing related surface defects.
Book Synopsis Shot Peening for Improved Fatigue Properties and Stress-corrosion Resistance by : James Edward Campbell
Download or read book Shot Peening for Improved Fatigue Properties and Stress-corrosion Resistance written by James Edward Campbell and published by . This book was released on 1971 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shot peening procedures developed over the past 40 years have resulted in substantial improvements in fatigue properties and stress corrosion resistance of high-strength alloys. These improvements have been observed in shot-peened specimens and components of high-strength steels, aluminum alloys, titanium alloys, and other engineering alloys. This report contains information on peening procedures that have been used in processing specimens and components to achieve these improvements in performance. Certain precautions are pointed out that should be observed in order to obtain the improved properties that have been attributed to the peening process. Some of the peening programs cited in this report indicate the peening intensities that resulted in the greatest benefit in performance based on test data covering a range of intensities, shot sizes, and other variables. (Author).
Book Synopsis Proceedings of the 5th International Conference on Industrial Engineering (ICIE 2019) by : Andrey A. Radionov
Download or read book Proceedings of the 5th International Conference on Industrial Engineering (ICIE 2019) written by Andrey A. Radionov and published by Springer Nature. This book was released on 2019-11-14 with total page 1449 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent findings in industrial, manufacturing and mechanical engineering, and provides an overview of the state of the art in these fields, mainly in Russia and Eastern Europe. A broad range of topics and issues in modern engineering are discussed, including the dynamics of machines and working processes, friction, wear and lubrication in machines, surface transport and technological machines, manufacturing engineering of industrial facilities, materials engineering, metallurgy, control systems and their industrial applications, industrial mechatronics, automation and robotics. The book gathers selected papers presented at the 5th International Conference on Industrial Engineering (ICIE), held in Sochi, Russia in March 2019. The authors are experts in various fields of engineering, and all papers have been carefully reviewed. Given its scope, the book will be of interest to a wide readership, including mechanical and production engineers, lecturers in engineering disciplines, and engineering graduates.
Book Synopsis Effect of NaC1 and Shot Peening on the Corrosion Fatigue of AISI 6150 Low-alloy Steel by : Michael Steven Baxa
Download or read book Effect of NaC1 and Shot Peening on the Corrosion Fatigue of AISI 6150 Low-alloy Steel written by Michael Steven Baxa and published by . This book was released on 1975 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shot Peening of Metal Parts by : AMS E Carbon and Low Alloy Steels Committee
Download or read book Shot Peening of Metal Parts written by AMS E Carbon and Low Alloy Steels Committee and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This specification covers procedure requirements for shot peening of metal parts, to induce residual compressive stresses in specified surfaces, for the purpose of improving resistance to fatigue, stress corrosion cracking, and galling (see 6.1).
Book Synopsis Thermal Machining Processes by : Society of Manufacturing Engineers
Download or read book Thermal Machining Processes written by Society of Manufacturing Engineers and published by . This book was released on 1979 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Machining written by J. Paulo Davim and published by Springer Science & Business Media. This book was released on 2008-07-11 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machining is one of the most important manufacturing processes. Parts manufactured by other processes often require further operations before the product is ready for application. “Machining: Fundamentals and Recent Advances” is divided into two parts. Part I explains the fundamentals of machining, with special emphasis on three important aspects: mechanics of machining, tools, and work-piece integrity. Part II is dedicated to recent advances in machining, including: machining of hard materials, machining of metal matrix composites, drilling polymeric matrix composites, ecological machining (minimal quantity of lubrication), high-speed machining (sculptured surfaces), grinding technology and new grinding wheels, micro- and nano-machining, non-traditional machining processes, and intelligent machining (computational methods and optimization). Advanced students, researchers and professionals interested or involved in modern manufacturing engineering will find the book a useful reference.
Book Synopsis Manufacturing Surface Technology by : Brian Griffiths
Download or read book Manufacturing Surface Technology written by Brian Griffiths and published by Elsevier. This book was released on 2001-11-01 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first title in the "Manufacturing Engineering Modular" series, the publication of this book marks recognition of the effect of surface finish obtained in manufacture ("surface integrity") on the functional performance of product, in terms of such factors as fatigue, corrosion and strength. It is a concise work, intended chiefly for undergraduate and postgraduate students, which should also provide useful material for the professional manufacturing engineer.
Book Synopsis Mechanical Properties of Irradiated Stainless Steels by : Richard E. Schreiber
Download or read book Mechanical Properties of Irradiated Stainless Steels written by Richard E. Schreiber and published by . This book was released on 1961 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue and Corrosion in Metals by : Pietro Paolo Milella
Download or read book Fatigue and Corrosion in Metals written by Pietro Paolo Milella and published by Springer Nature. This book was released on with total page 965 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Zinc and Its Alloys by : United States. National Bureau of Standards
Download or read book Zinc and Its Alloys written by United States. National Bureau of Standards and published by . This book was released on 1931 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal Fatigue in Engineering by : Henry O. Fuchs
Download or read book Metal Fatigue in Engineering written by Henry O. Fuchs and published by . This book was released on 1980-06-20 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Optimal Design Mechanical and Structural Systems Edward J. Haug & Jasbir S. Arora This computer-aided design text presents and illustrates techniques for optimizing the design of a wide variety of mechanical and structural systems through the use of nonlinear programming and optimal control theory. A state space method is adopted that incorporates the system model as an integral part of the design formulations. Step-by-step numerical algorithms are given for each method of optimal design. Basic properties of the equations of mechanics are used to carry out design sensitivity analysis and optimization, with numerical efficiency and generality that is in most cases an order of magnitude faster in digital computation than applications using standard nonlinear programming methods. 1979 Optimum Design of Mechanical Elements, 2nd Ed. Ray C. Johnson The two basic optimization techniques, the method of optimal design (MOD) and automated optimal design (AOD), discussed in this valuable work can be applied to the optimal design of mechanical elements commonly found in machinery, mechanisms, mechanical assemblages, products, and structures. The many illustrative examples used to explicate these techniques include such topics as tensile bars, torsion bars, shafts in combined loading, helical and spur gears, helical springs, and hydrostatic journal bearings. The author covers curve fitting, equation simplification, material properties, and failure theories, as well as the effects of manufacturing errors on product performance and the need for a factor of safety in design work. 1980 Globally Optimal Design Douglass J. Wilde Here are new analytic optimization procedures effective where numerical methods either take too long or do not provide correct answers. This book uses mathematics sparingly, proving only results generated by examples. It defines simple design methods guaranteed to give the global, rather than any local, optimum through computations easy enough to be done on a manual calculator. The author confronts realistic situations: determining critical constraints; dealing with negative contributions; handling power function; tackling logarithmic and exponential nonlinearities; coping with standard sizes and indivisible components; and resolving conflicting objectives and logical restrictions. Special mathematical structures are exposed and used to solve design problems. 1978
Download or read book Shot Peening written by John S. Eckersley and published by . This book was released on 1991 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
