摘要
本文应用Gleeble-3500热压缩试验机,对NiTi形状记忆合金开展如下工艺试验:温度范围在:700℃~1100℃,间隔100℃,应变速率为:0.005s-1、0.05s-1、0.5s-1、10s-1,真应变为0.7。获得该合金的应力-应变曲线关系,计算应变速率敏感性指数(m)值、热变形激活能(Q)值,并建立本构方程。揭示该合金的热变形行为特征,为NiTi形状记忆合金热加工及成形制造的工程化应用提供理论依据。
The hot compression deformation of NiTi i shape memory alloy were investigated systematically on a Gleeble-3500 hot simulating tester.Based on the hot compression test behavior and mechanism on high temperature deformation behavior and microstructure evolution,the variation of strain rate sensitivity exponent m,activation energy Q values at different strain rates and different temperatures were obtained.The characteristics of thermal deformation behavior of NiTi shape memory alloy were revealed,which provided a theoretical basis for the engineering application of NiTi shape memory alloy in thermal processing and forming manufacturing.
作者
钟益平
ZHONG Yi-ping(Shanghai Yunzhu 3D Technology Co.,Ltd.,Shanghai 200000,China)
出处
《世界有色金属》
2020年第8期248-250,共3页
World Nonferrous Metals
