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检索条件：关键词= Ni3Al
谷月峰 , 林栋梁 , 单爱党 , 刘毅 , 叶伟
金属学报
定向凝固（ＤＳ）Ｎｉ３Ａｌ合金在１０００至１０５０℃温区，应变速率为２．１×１０（－４）ｓ（－１）时，应变速率敏感指数ｍ大于０．３，最大延伸可达１８５％，具有超塑变形的行为待征．金相及电子显微镜观察表明：超塑变形后，原始柱状晶内有亚结构及新晶粒生成。认为ＤＳＮｉ３Ａｌ高温变形后发生了动态再结晶过程，...
关键词: 定向凝固 , Ni3Al , high temperature deformation
Shanthi Subramanian , David Muller , John Silcox and Stephen L.Sass (Department of Materials Science and Engineering and Department of Applied and Engineering Physics , Cornell University , Ithaca. NY 14853)
金属学报(英文版)
Local chemistry plays an important role in determining the cohesive strength of grain boundaries in Ni3Al. Doping with B increases the room temperature ductility and changes the fracture mode from intergranular to transgranular, while doping with Zr increases the ductility but leaves the fracture mo...
关键词: : grain boundary chemistry , null , null , null
