Thermomechanical response of NiTi shape-memory nanoprecipitates in TiV alloys

Thermomechanical response of NiTi shape-memory nanoprecipitates in TiV alloys
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TiV 合金中 NiTi 形状记忆纳米沉淀物的热机械响应

DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Jiali Zhang
Jiali Zhang
中科院分区：
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文献类型：
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作者：
S. Maisel;W. Ko;B. Grabowski;J. Neugebauer;Jiali Zhang

文献摘要

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基于改进的艾德嵌入原子方法，采用三维原子模拟方法研究了NiTi形状记忆纳米粒子在TiV基体中的相干嵌入特性.为此，我们开发并提出了一个合适的NiTiV潜力，我们的模拟。利用这种潜力，我们确定了触发这种纳米颗粒的马氏体相变的条件，这些条件如何通过修改颗粒的大小，周围基质的组成或系统的温度和应变状态来调整。利用这些见解，我们建立了这种颗粒的相变温度可以在insunenced和形状记忆强化合金的背景下讨论的实际意义。
We study the properties of NiTi shape-memory nanoparticles coherently embedded in TiV matrices using three-dimensional atomistic simulations based on the modified embedded-atom method. To this end, we develop and present a suitable NiTiV potential for our simulations. Employing this potential, we identify the conditions under which the martensitic phase transformation of such a nanoparticle is triggered—specifically, how these conditions can be tuned by modifying the size of the particle, the composition of the surrounding matrix, or the temperature and strain state of the system. Using these insights, we establish how the transformation temperature of such particles can be influenced and discuss the practical implications in the context of shape-memory strengthened alloys.