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首页> 外文期刊>Philosophical Magazine Letters >In situ characterization of the martensitic transformation temperature of NiTi shape memory alloys via instrumented microindentation
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In situ characterization of the martensitic transformation temperature of NiTi shape memory alloys via instrumented microindentation

机译：NiTi形状记忆合金马氏体转变温度的原位表征

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摘要

A novel, instrumented microindentation technique was successfully used to measure the temperature associated with the martensitic transformation leading to the recovery of plastic strain in a Nickel-Titanium (NiTi) shape memory alloy. Following a standard indentation cycle, the indenter was partially unloaded such that a good contact was maintained between indenter and specimen surface. The onset and finish temperature of the martensitic transformation, the associated volume contraction, and the amount of the recovered plastic deformation were determined by quantifying the indenter displacement as a function of temperature. These experiments were compared to conventional measurements of the transformation temperature by differential scanning calorimetry and compression testing.
机译：一种新型的仪器化微压痕技术已成功用于测量与马氏体相变相关的温度，从而导致镍钛（NiTi）形状记忆合金的塑性应变得以恢复。在标准压痕循环之后，压头被部分卸载，从而在压头和样品表面之间保持良好的接触。马氏体转变的开始和结束温度，相关的体积收缩和恢复的塑性变形量通过量化压头位移随温度的变化来确定。通过差示扫描量热法和压缩测试将这些实验与转化温度的常规测量进行了比较。

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