Effect of Surface Polishing Treatment on the Fatigue Performance of Shot-Peened Ti-6Al-4V Alloy

被引：29
|
作者：
Liu, Z. G. [1 ]
Wong, T. I. [2 ]
Huang, W. [1 ]
Sridhar, N. [1 ]
Wang, S. J. [2 ]
机构：
[1] ASTAR, Inst High Performance Comp, 1 Fusionopolis Way, Singapore 138632, Singapore
[2] ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way, Singapore 138634, Singapore
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2017年 / 30卷 / 07期
关键词：
Shot peening; Surface polishing treatment; Fatigue; Residual stress; Ti-6Al-4V alloy; HIGH-CYCLE FATIGUE; RESIDUAL-STRESSES; FRETTING FATIGUE; MICROSTRUCTURE; STEEL; BEHAVIOR; LIFE; RELAXATION; RESISTANCE;
D O I：
10.1007/s40195-017-0555-x
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In this study, shot peening is applied to the titanium alloy Ti-6Al-4V, and the surface treatment effect on fatigue life of shot-peened specimens under high cycle loading is investigated. The induced residual stress is measured by using the orbital hole-drilling method. Surface profilometer and optical microscopy are employed to characterize the surface roughness and morphology. The deformed microstructure layers of the shot-peened specimens are investigated by using scanning electron microscopy. Experiments reveal that the fatigue life of Ti-6Al-4V is improved by the shot peening process, and the surface pre-peening polishing. The combination of pre- and post-peening polishing treatments further improves fatigue life of Ti-6Al-4V specimens. The present work provides useful guidelines for developing more efficient shot peening strategies.
引用
收藏
页码：630 / 640
页数：11
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