Origin of transformation hysteresis expansion by deformation of shape memory alloys;
塑性变形提高形状记忆合金相变滞后机制的探讨
After appropriate predeformation, a wide hysteresis was observed in such low Nb alloys.
5%)的Ni—Ti—Nb形状记忆合金的微观组织形态和相变特征以及预变形对相变滞后的影响。
At present, the ternary alloy of Ni47Ti44Nb9 is adopted as the typical shape memory alloy with wide hysteresis home and abroad both for basic application and engineering study.
本文采用SEM、XRD、DSC、电阻—温度测试仪及不同温度下的拉伸实验等测试技术,系统地研究了低Nb合金的Ni/Ti比例变化对其组织结构及相变特征的影响,分析了合金的力学行为、变形量对相变滞后及应变恢复率的影响,阐述了NiTiNb合金宽滞后的机理。
The mechanism of increase of martensitic transformation hysteresis after optimum plastic deformation has been discussed by thermodynamics and kinetics of martensitic transformation.
研究了形变对Ni-Mn-Ga合金马氏体相变及其组织形态的影响,并应用马氏体相变热力学和动力学探讨了适当塑性变形后马氏体相变滞后得以大幅度提高的微观本质。