Laser shock peening induced surface nanocrystallization and martensite transformation in austenitic stainless steel
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- 作者：Liucheng Zhou ; Weifeng He ; Sihai Luo ; Changbai Long ; Cheng Wang ; Xiangfan Nie ; Guangyu He ; XiaoJun Shen ; Yinghong Li ; yinghong_li@126.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：AISI 304ss ; Laser shock peening ; Surface nanocrystallization ; Martensite
- 刊名：Journal of Alloys and Compounds
- 出版年：2016
- 出版时间：15 January 2016
- 年：2016
- 卷：655
- 期：Complete
- 页码：66-70
- 全文大小：1365 K
文摘
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We founded that a layer of isometric nanocrystalline with a size of 50–300 nm has been formed on the surface of AISI 304 stainless steel subjected to multiple laser shock peening (LSP) impacts.
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And we found that the deformation-induced martensite (DIM) is an important deformation mechanism for grain refinement in the top surface at ultra-high strain rates in AISI 304ss subjected to multiple LSP impacts.
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The intersectional MTs and DIMs aligned in multiple directions plays an important role in the grain refinement of coarse grains in the surface layer of AISI 304ss.