论文部分内容阅读
用压缩实验的方法研究了热等静压处理后 ＤＳ ＮｉＡｌ－２８Ｃｒ－５．５Ｍｏ－０．５Ｈｆ合金的高温变形行为．发现流变应力随温度升高或应变速率减小而降低，服从幂指数规律，并求出了合金的应力指数 ｎ和变形激活能 Ｑ．运用 ＨＲＥＭ从微观方面分析了合金中存在的各种界面以及界面与力学性能的关系．
The deformation behavior of DS NiAl-28Cr-5.5Mo-0.5Hf alloy after hot isostatic pressing was studied by compression test. It is found that the flow stress decreases with the increase of temperature or strain rate, obeying the law of power exponent and calculating the stress exponent n and deformation activation energy Q of the alloy. The HREM was used to analyze the various interfaces existing in the alloy and the relationship between interface and mechanical properties.