期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 153, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2021.106465
关键词
Surface treatments; Shot peening; Microstructures; Residual stresses; Fractography
资金
- National Science and Technology Major Projects of China [2017-VII-0001-0094, 2019-VII-0015]
The fatigue life of Ti-6Al-4V titanium alloy can be significantly improved by integrating laser shock peening and shot peening, mainly through enhancing the distribution of compressive residual stress and dislocation-gradient microstructure.
In this work, the effect of a novel post process integrating laser shock peening (LSP) with shot peening (SP) on the fatigue property of Ti-6Al-4V titanium alloy is investigated. The fatigue life can be improved (up to 9.3 times) by this post-process. The compressive residual stress (CRS) distribution and dislocation-gradient microstructure obtained were found to be responsible for the improvement. The fatigue crack initiation was hindered by the high-density dislocation layer with high CRS value on the surface and maximum CRS in the sub-surface, while the crack propagation was retarded by the dislocation proliferation layer with large CRS gradient.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据