High-strength titanium alloy nanopillars with stacking faults and enhanced plastic flow
High-strength titanium alloy nanopillars with stacking faults and enhanced plastic flow
复制标题
具有堆垛层错和增强塑性流动的高强度钛合金纳米柱
DOI：
10.1063/1.3683489
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发表时间：
2012-02-06
影响因子：
4
通讯作者：
Ma, Evan
中科院分区：
文献类型：
--
作者：
Yu, Qian;Li, Suzhi;Ma, Evan
通过非原位和原位压缩和拉伸试验的微米和亚微米尺寸的单晶六方密堆积（HCP）的钛合金柱取向的棱柱滑移，我们已经观察到“越小越强”和较大的样品表现出明显的应变爆发。然而，对于非常小的样品，塑性流动变得更加稳定，无论是在压缩和拉伸，主要是由于出现了高密度的基底堆垛层错（SF）驱动的极高的应力，很少出现在较大的样品和散装对应。这项工作展示了一个配方，对超高强度（GPa级）的纳米样品与连续塑性流动。(C)2012年美国物理学会。[doi：10.1063/1.3683489]
Through ex situ and in situ compression and tension tests of micrometer- and submicrometer-sized single crystal hexagonal close packed (HCP) Ti alloy pillars oriented for prismatic slip, we have observed that "smaller is stronger" and the larger samples exhibit obvious strain bursts. However, for extremely small samples, the plastic flow becomes much more stable both in compression and tension, mainly due to the emergence of a high density of basal stacking faults (SFs) driven by extremely high stress, which rarely appear in larger samples and bulk counterpart. This work demonstrates a recipe towards ultra-high strength (GPa level) nanoscale samples with continous plastic flow. (C) 2012 American Institute of Physics. [doi:10.1063/1.3683489]