Previous work did not identify occurrence stage and degree of martensitic stabilization in Cu-based shape memory alloys due to lower heating rate. By flash heating into liquid metals, we systematically clarified contribution of static ageing and the ones of dynamic ageing during process of quenching and heating to the martensitic stabilization in directly-quenched CuZnAl alloys. We discovered that the dynamic ageing during the cooling process of quenching could instantaneously stabilize a few already formed martensites totally although it did not stabilize the overwhelming majority of martensites. The dynamic ageing during the process of subsequent slow heating was responsible for the partial and total stabilization of overwhelming majority of martensites. Both the amounts of martensites stabilized totally by the two dynamic ageing positively depended on M_s temperature. The conventional up-quenching into oil or air actually made more martensites stabilized due to the dynamic ageing during the process of slow heating. The increase in A_s temperature owing to the static ageing also positively depended on the M_s temperature. These dependences cannot be explained by two well-known mechanisms for the martensitic stabilization.

由于加热速率较低，以前的工作没有确定铜基形状记忆合金中马氏体稳定的发生阶段和程度。通过快速加热液态金属，我们系统地阐明了淬火和加热过程中静态时效和动态时效对直接淬火 CuZnAl 合金马氏体稳定化的贡献。我们发现，淬火冷却过程中的动态时效可以瞬间稳定少数已经形成的马氏体，尽管它不能稳定绝大多数马氏体。随后缓慢加热过程中的动态时效是绝大多数马氏体部分和全部稳定的原因。_s温度。由于缓慢加热过程中的动态时效，传统的油或空气上淬实际上使更多的马氏体稳定。由于静态老化导致的A _s温度升高也正依赖于M _s温度。这些依赖性不能用两种众所周知的马氏体稳定机制来解释。