Stress-dependent deformation behaviour in bulk nanocrystalline titanium-nickel alloys
Stress-dependent deformation behaviour in bulk nanocrystalline titanium-nickel alloys
复制标题
大块纳米晶钛镍合金的应力相关变形行为
DOI：
10.1080/02670836.2015.1114206
复制
发表时间：
2016
影响因子：
1.8
通讯作者：
Xiangyi Zhang
中科院分区：
文献类型：
--
作者：
Qian Zhang;Wenpeng Song;Xiaohong Li;Vladimir V. Stolyarov;Xiangyi Zhang
研究了平均晶粒度小于10-20 nm的块体纳米晶钛镍在应力作用下的变形机制。结果表明，随着变形应力的增加，变形机制从晶界滑移和晶格旋转到晶界生长和位错活动依次发生变化。这些变形机制不同于以前的理解，即在10-20 nm的临界晶粒度以下，GB滑动和晶格旋转控制着NC材料的塑性变形。
In this study, the deformation mechanisms operating with stress in bulk nanocrystalline (NC) titanium–nickel with an average grain size below a critical size of 10–20 nm have been investigated. We demonstrate a sequential variation of the deformation mechanism from grain boundary (GB) sliding and grain rotation to grain growth and dislocation activity with the increase of the deformation stress. These deformation mechanisms are different from the previous understanding that below a critical grain size of 10–20 nm, GB sliding and grain rotation govern plastic deformation of NC materials.