Fatigue of Surface-Treated Nickel-Based Superalloy at High Temperature

被引：0
作者：
K. S. Chin
S. Idapalapati
D. T. Ardi
机构：
[1] Nanyang Technological University,School of Mechanical and Aerospace Engineering
[2] Advanced Remanufacturing and Technology Centre,undefined
来源：
Journal of Materials Engineering and Performance | 2019年 / 28卷
关键词：
cold work; fatigue; nickel-based superalloys; residual stress; surface treatment;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Nickel-based superalloy IN718 specimens were subjected to two surface treatments, namely shot peening (SP) and deep cold rolling (DCR) to investigate the effects of surface integrity (in particular residual stresses and cold work) on fatigue performance. Residual stress and cold work profiles of the different specimens were obtained using x-ray diffraction (XRD). Microhardness profiles were also obtained from the samples as a comparison against full width at half maximum (FWHM) from XRD in evaluation of cold work. Surface roughness effects were found to be insignificant, evident from the surface-initiated fatigue cracks in both SP and DCR specimens. Fatigue life improvements exhibited by SP and DCR specimens over the as-machined equivalent can be attributed to crack retardation due to work-hardened layer as well as compressive residual stresses.
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页码：7181 / 7187
页数：6
相关论文
共 90 条
[1]  
James MN(2007)Residual Stresses and Fatigue Performance Eng. Fail. Anal. 14 384-395
[2]  
Hughes DJ(2001)Residual Stress. Part 2—Nature and Origins Mater. Sci. Technol. 17 366-375
[3]  
Chen Z(1979)Subsurface Crack Initiation During Fatigue as a Result of Residual Stresses Fatigue Fract. Eng. Mater. Struct. 1 319-327
[4]  
Lombard H(2003)Another Mechanism for Fatigue Strength Improvement of Metallic Parts by Shot Peening J. Mater. Eng. Perform. 12 507-511
[5]  
Hattingh DG(2006)Subsurface Crack Initiation and Propagation Mechanism in High-Strength Steel in a Very High Cycle Fatigue Regime Int. J. Fatigue 28 1521-1532
[6]  
Asquith D(2007)Residual Stress and Its Role in Failure Rep. Prog. Phys. 70 2211-383
[7]  
Yates JR(2001)Residual Stress Distributions and Their Influence on Fatigue Lifetimes Int. J. Fatigue 23 375-230
[8]  
Webster PJ(2003)On the Influence of Mechanical Surface Treatments—Deep Rolling and Laser Shock Peening—On the Fatigue Behavior of Ti–6Al–4 V at Ambient and Elevated Temperatures Mater. Sci. Eng., A 355 216-205
[9]  
Withers PJ(2007)A Literature Survey on the Stability and Significance of Residual Stresses During Fatigue Fatigue Fract. Eng. Mater. Struct. 30 173-37
[10]  
Bhadeshia HKDH(2001)Investigation of Residual Stress Relaxation Under Cyclic Load Int. J. Fatigue 23 31-614
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