Abstract Phase transformation and shape memory response of NiTi alloys are sensitive to the variation of temperature and stress. Thus, the phase transformation of NiTi alloys becomes more complex during machining process. This study presents findings from a major study involving modelling of machining-induced phase transformation of NiTi alloys performed by modifying Helmholtz free energy-based microstructure model. Orthogonal cutting tests were performed to validate the predicted outputs from the simulation, such as cutting forces, temperatures and chip morphology. This work provides a strong evidence that the developed new model can accurately predict the experimentally recorded outputs in machining of NiTi alloys.

中文翻译：

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NiTi 形状记忆合金正交加工中的切屑形成和相变：基于显微结构的建模和实验验证

摘要 NiTi合金的相变和形状记忆响应对温度和应力的变化很敏感。因此，NiTi合金的相变在加工过程中变得更加复杂。本研究展示了一项主要研究的结果，该研究涉及通过修改基于亥姆霍兹自由能的微观结构模型对 NiTi 合金的加工诱导相变进行建模。进行正交切削试验以验证模拟的预测输出，例如切削力、温度和切屑形态。这项工作提供了强有力的证据，表明开发的新模型可以准确预测 NiTi 合金加工中实验记录的输出。