形状记忆合金最成功的商业应用是管接头和机械紧固件。当这些合金用作热机械接头元件时,重要之点是在整个使用期间安装部分应保持奥氏体状态。 如果它们变成马氏体,回复应力至少会减至马氏体屈服应力,形状记忆连接就会失效。因此在过去,人们使用在任何正常使用温度下均保持奥氏体状态的低温合金(Ms<290K)。于是人们进行了一些研究,旨在开发新的可用于低温的Cu基形状记忆合金,它们 The most successful commercial applications of shape memory alloys are fittings and mechanical fasteners. When these alloys are used as thermo-mechanical coupling elements, it is important that the mounting section should remain austenitic throughout its service life. If they become martensite, the return stress will be reduced to at least the martensitic yield stress, and the shape memory connection will fail. Therefore, in the past, people used a low-temperature alloy (Ms <290K) that maintained an austenitic state at any temperature normally used. So a few studies were carried out to develop new Cu-based shape memory alloys for low temperature applications