Nanoscale deformation twinning at ultrahigh strain rates during kinetic spraying of nickel

被引：14
作者：
Bae, Gyuyeol [1 ]
Kang, Kicheol [1 ]
Lee, Changhee [1 ]
机构：
[1] Hanyang Univ, Div Engn & Mat Sci, Kinet Spray Coating Lab, Seoul 133791, South Korea
来源：
MATERIALS LETTERS | 2012年 / 89卷
基金：
新加坡国家研究基金会;
关键词：
Deformation twinning; Nickel; Nanocrystalline materials; Metallurgy; Ultrahigh strain rates; Kinetic (or cold) spray; MECHANICAL-PROPERTIES; TEMPERATURE; REFINEMENT; TITANIUM; FLOW;
D O I：
10.1016/j.matlet.2012.08.133
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanoscale twins parallel to the {111} planes were observed to be formed by deformation twinning in a nano-sized grain during kinetic spraying of nickel ( >99.5% purity) at ultrahigh strain rates ( > 10(7) s(-1)), high strain levels ( > 100%) and high temperatures ( >873 K). An interfacial region dominated by strain hardening over thermal softening upon impact, as shown by finite element simulations, is considered to facilitate twinning with the aid of the effects of small amounts of solute atoms and nanocrystalline/amorphous nickel oxides trapped at local interfaces. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：320 / 323
页数：4
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