基于热压缩模拟实验的800H合金高温变形行为研究

Study on High Temperature Deformation Behavior of 800H Alloy Based on Heat Compression Simulation Experimental

通过对800H合金进行单道次热压缩模拟实验,得到了不同温度、不同应变速率的应力-应变曲线,并通过计算机软件分析,研究了其在不同变形条件下的动态再结晶行为和诱变析出相。结果表明:800H合金在高温变形过程中,高应变速率的变形储能随位错密度的增大不断增加,动态再结晶的临界温度也随之下降。在本文实验条件下,800H合金析出相的含量发生变化的临界温度为950℃。

The stress-strain curves of 800H alloy were obtained by single gate heat compression simulations experimental,and the dynamic recrystallization behavior and mutagenic precipitates under different deformation conditions were studied.The results show that deformation energy storage of 800H alloy in high strain rate increase with the increase of dislocation density in the high temperature deformation process, and the critical temperature of dynamic recrystallization decreases. The critical temperature of 800H alloy, at which the change of the amount of precipitated phase occur, is 950 ℃ under the experimental conditions.