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近年来由于制造加工技术的改善,形状记忆效应和TiNi合金得到研究者、工程师和设计人员越来越多的关注.对形状记忆合金在高应变率下行为的理解取得了较大的进展.文章回顾了钛镍形状记忆合金在高应变率加载下行为的研究进展,并给出了研究年表.观测了在不同温度和应变率下的热-力学响应,以及高应变率对TiNi形状记忆合金的功能特性的影响.提出基于屈服准则来描述马氏体TiNi形状记忆合金的动态力学行为.在实验中通过控制电脉冲的幅度和宽度,确定导致马氏体TiNi合金非弹性应变的临界载荷幅值和特征时间,以及确定基于“孵化时间”概念的屈服参数.
In recent years, due to the improvement of manufacturing and processing technology, shape memory effect and TiNi alloy get more and more attention from researchers, engineers and designers, and great progress has been made in the understanding of the behavior of shape memory alloy at high strain rate. The research progress of titanium-nickel shape memory alloy under high strain rate loading is reviewed, and the chronology of the study is given. The thermal-mechanical response at different temperature and strain rates and the effect of high strain rate on TiNi shape memory alloy The dynamic mechanical behavior of martensitic TiNi shape memory alloy is proposed based on the yield criterion.The critical load amplitude of martensitic TiNi alloy inelastic strain is determined by controlling the amplitude and width of the electric pulse in the experiment Value and signature time, and yield parameters based on the concept of “hatch time”.