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The Effects Of Shot Peening On Low Cycle Fatigue Life Of 7075 T6 Aluminium Alloy Round Bar
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Book Synopsis The Effects of Shot Peening on Low Cycle Fatigue Life of 7075-T6 Aluminium Alloy Round Bar by : Donald Michael Dirk Peters
Download or read book The Effects of Shot Peening on Low Cycle Fatigue Life of 7075-T6 Aluminium Alloy Round Bar written by Donald Michael Dirk Peters and published by . This book was released on 2014 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Influence of Precorrosion on Fatigue Properties of Shot-Peened Aluminium 7075-T651 by : U. Zupanc
Download or read book Influence of Precorrosion on Fatigue Properties of Shot-Peened Aluminium 7075-T651 written by U. Zupanc and published by . This book was released on 2011 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pitting corrosion has a major influence on aging of structural elements made of high-strength aluminium alloys as corrosion pits lead to much earlier fatigue crack initiation under tensile dynamic loading. In order to improve material resistance to corrosion fatigue, it is necessary to reduce pit-tip stresses in the corroded pits areas. Shot peening (SP) is an important and well-known cold working process, having been used in industrial applications for a long time. Shot peening as intense plastic deformation in the thin surface layer affects cold surface hardening by primary inducing favorable residual compressive stresses. It is used in order to increase fatigue strength in operation and to improve fatigue resistance of precorroded material. The paper deals with the surface integrity of shot-peened high-strength 7075-T651 aluminium alloy. The paper describes the effects of SP treatment by presenting analyses of surface roughness measurement, residual stresses, material bending fatigue resistance, fractographic analysis of fatigued specimens, and electrochemical potentiodynamic testing.
Book Synopsis Effect of Shot Peening on Fatigue Crack Growth in 7075-T7351 by : T. Honda
Download or read book Effect of Shot Peening on Fatigue Crack Growth in 7075-T7351 written by T. Honda and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of shot peening on fatigue crack growth in 7075-T735 single-edged notch bend (SENB) and three point bend (TPB) specimens are discussed. Fifty-one total fatigue tests were conducted with SENB and TPB specimens, which were machined from an 8.1 mm thick 7075-T7351 aluminum stock plate. All specimens were tested in the as-received or shot peened conditions, with crack perpendicular to the rolling direction, i.e., in the L-T direction. Fatigue tests of SENB specimens were conducted at a constant maximum load, stress ratios of R = 0.1 or 0.8, and to a pre-determined fatigue cycle or to failure. Crack growth rate was determined from the tunneling crack profile or by fractography. Peened surface roughness, subsurface microstructure, and micro-hardness profiles were also examined to evaluate their effect on crack growth rate. The TPB specimens were fatigued to failure at stress ratios of R = 0.1 or 0.8 and a S-N diagram constructed. Both the SENB and the TPB test results showed that severe shot peening (0.016A) slightly increased the fatigue life at low stress ratio of R = 0.1 but was found to be negligible at a high load ratio of R = 0.8. The stress concentration factor due to dimples generated by severe shot peening was estimated to be 1.14 and had negligible effect on the fatigue life. Grain distortion was observed to a depth range of 130-410 μm indicating the depth of the residual compressive stress layer developed for peening intensities of 0.004-0.016A, respectively.
Book Synopsis Effects of Shot Peening Processing on the Fatigue Behavior of Three Aluminum Alloys and TI-AL-4V. by : James Campbell
Download or read book Effects of Shot Peening Processing on the Fatigue Behavior of Three Aluminum Alloys and TI-AL-4V. written by James Campbell and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue strength of three shot-peened aluminum alloys (Al 7075-T651, Al 2024-T351 and Al 2014-T6) and a titanium alloy (Ti-6Al-4V) was measured to determine the differences in shot peening quality from three vendors that were given the same shot peening parameters. Shot peening produces surface roughness, a cold-worked layer and, most importantly, a residual stress layer that resists the propagation of fatigue cracks. Significant vendor-to-vendor differences in fatigue properties were found, with Vendor 1 giving the greatest fatigue lifetimes.
Book Synopsis The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel by :
Download or read book The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel written by and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Life Extension and the Effects of Laser Peening on 7050-T7451 Aluminum, 7085-T7651 Aluminum, and Ti-6Al-4V Titanium Alloys by : Harold Luong
Download or read book Fatigue Life Extension and the Effects of Laser Peening on 7050-T7451 Aluminum, 7085-T7651 Aluminum, and Ti-6Al-4V Titanium Alloys written by Harold Luong and published by . This book was released on 2006 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Effect of Shot Peening on Fatigue Crack Growth in 7075-T7351 by : M. Ramulu
Download or read book Effect of Shot Peening on Fatigue Crack Growth in 7075-T7351 written by M. Ramulu and published by . This book was released on 2007 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of shot peening on fatigue crack growth in 7075-T735 single-edged notch bend (SENB) and three point bend (TPB) specimens are discussed. Fifty-one total fatigue tests were conducted with SENB and TPB specimens, which were machined from an 8.1 mm thick 7075-T7351 aluminum stock plate. All specimens were tested in the as-received or shot peened conditions, with crack perpendicular to the rolling direction, i.e., in the L-T direction. Fatigue tests of SENB specimens were conducted at a constant maximum load, stress ratios of R = 0.1 or 0.8, and to a pre-determined fatigue cycle or to failure. Crack growth rate was determined from the tunneling crack profile or by fractography. Peened surface roughness, subsurface microstructure, and micro-hardness profiles were also examined to evaluate their effect on crack growth rate. The TPB specimens were fatigued to failure at stress ratios of R = 0.1 or 0.8 and a S-N diagram constructed. Both the SENB and the TPB test results showed that severe shot peening (0.016A) slightly increased the fatigue life at low stress ratio of R = 0.1 but was found to be negligible at a high load ratio of R = 0.8. The stress concentration factor due to dimples generated by severe shot peening was estimated to be 1.14 and had negligible effect on the fatigue life. Grain distortion was observed to a depth range of 130-410 ?m indicating the depth of the residual compressive stress layer developed for peening intensities of 0.004-0.016A, respectively.
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781726673556 Total Pages :38 pages Book Rating :4.6/5 (735 download)
Book Synopsis The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel by : National Aeronautics and Space Adm Nasa
Download or read book The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-03 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue and crack growth tests have been conducted on 4340 steel and 2024-T3 aluminum alloy, respectively, to assess the effects of shot peening on fatigue life and the effects of shot and laser peening on crack growth. Two current programs involving fixed and rotary-wing aircraft will not be using shot peened structures. Since the shot peening compressive residual stress depth is usually less than the 0.05-inch initial damage tolerance crack size, it is believed by some that shot peening should have no beneficial effects toward retarding crack growth. In this study cracks were initiated from an electronic-discharged machining flaw which was cycled to produce a fatigue crack of approximately 0.05-inches in length and then the specimens were peened. Test results showed that after peening the crack growth rates were noticeably slower when the cracks were fairly short for both the shot and laser peened specimens resulting in a crack growth life that was a factor of 2 to 4 times greater than the results of the average unpeened test. Once the cracks reached a length of approximately 0.1-inches the growth rates were about the same for the peened and unpeened specimens. Fatigue tests on 4340 steel showed that the endurance limit of a test specimen with a 0.002-inch-deep machining-like scratch was reduced by approximately 40 percent. However, if the "scratched" specimen was shot peened after inserting the scratch, the fatigue life returned to almost 100 percent of the unflawed specimens original fatigue life. Everett, R. A., Jr. and Matthews, W. T. and Prabhakaran, R. and Newman, J. C., Jr. and Dubberly, M. J. Langley Research Center NASA/TM-2001-210843, NAS 1.15:210843, ARL-TR-2363, L-18065
Book Synopsis An Investigation of Strain Cycling Behavior of 7075-T6 Aluminum Under Combined State of Strain by : S. Y. Zamrik
Download or read book An Investigation of Strain Cycling Behavior of 7075-T6 Aluminum Under Combined State of Strain written by S. Y. Zamrik and published by . This book was released on 1972 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Variable-amplitude Fatigue Tests with Particular Attention to the Effects of High and Low Loads by : Eugene C. Naumann
Download or read book Variable-amplitude Fatigue Tests with Particular Attention to the Effects of High and Low Loads written by Eugene C. Naumann and published by . This book was released on 1962 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experiments and Modeling of the Effect of Heat Exposure on Fatigue of 6061 and 7075 Aluminum Alloys by : Andrew T. Brammer
Download or read book Experiments and Modeling of the Effect of Heat Exposure on Fatigue of 6061 and 7075 Aluminum Alloys written by Andrew T. Brammer and published by . This book was released on 2013 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strain-controlled fatigue tests were performed on 6061-T6 and 7075-T651 aluminum alloys as well as additional specimens of the same materials after exposure to a temperature of 538oC for 1 hour and cooling to room temperature. The fatigue behavior of all four materials was characterized using traditional strain-life analysis. The fatigue data was found to show no appreciable effect of the heat exposure in low cycle fatigue, and a decrease in fatigue life in high cycle fatigue in both 6061 and 7075. In addition, scanning electron microscopy was employed to determine that crack initiation occurred at Fe-rich particles and subsequence analysis was used to measure crack growth rates. The fatigue cracks were found to initiate at cracked intermetallic particles in the peak-aged alloys and at de-bonded particles in the heat exposed alloys. Using standard metallographic techniques, microstructural characterization including grain size, intermetallic particle size, and nearest neighbor distance were quantified. As such, this characterization data was implemented into a microstructure-sensitive fatigue model resulting in a unique set of modeling parameters to capture the experimental results of both the peak-aged and thermally-affected 6061 aluminum alloy and 7075 aluminum alloy data.
Book Synopsis The Effect of Shot-peening on the Fatigue Strength of an Aluminium Alloy by : Frank Sherratt
Download or read book The Effect of Shot-peening on the Fatigue Strength of an Aluminium Alloy written by Frank Sherratt and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel by :
Download or read book The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel written by and published by . This book was released on 2001 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the Influence of Load Randomization and of Ground-air-ground Cycles on Fatigue Life by : Eugene C. Naumann
Download or read book Evaluation of the Influence of Load Randomization and of Ground-air-ground Cycles on Fatigue Life written by Eugene C. Naumann and published by . This book was released on 1964 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Loading Sequence on Cumulative Fatigue Damage of 7075-T6 Aluminum Alloy by : Robert Spitzer
Download or read book Effect of Loading Sequence on Cumulative Fatigue Damage of 7075-T6 Aluminum Alloy written by Robert Spitzer and published by . This book was released on 1961 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
