Thermal stability of surface nanostructure produced by laser shock peening in a Ni-based superalloy

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• 作者：Luo Sihai ; Nie Xiangfan ; Zhou Liucheng ; You Xi ; He Weifeng ; ^{hehe_coco@163.com} ; Li Yinghong ; ^{yinghong_li@126.com}
• 关键词：Laser shock peening ; Ni-based superalloy ; Surface nanocrystalline ; Thermal stability ; In-situ transmission electron microscopy (TEM) annealing
• 刊名：Surface and Coatings Technology
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：311
• 期：Complete
• 页码：337-343
• 全文大小：1149 K
• 卷排序：311

文摘

A nanocrystructure layer with the grain size of about 20 ~ 200 nm in a Ni-based superalloy was fabricated by means of laser shock peening (LSP). The thermal stability of surface nanostructure was investigated by in-situ TEM observation and nanoindentation. The results show that the nanostructure has a good thermal stability and then the stability mechanism was discussed in detail.