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王富岗 , 祝苏明 , 朱世杰 , 任晓民 , 谭毅 , 张俊善
金属学报
在两种不同晶界状态下研究了Fe-Cr15-Ni25合金的蠕变裂纹扩展行为。单相合金的空洞在晶界三叉点处形核,而对晶界上有碳化物析出的合金,空洞在晶界碳化物上形核。晶界碳化物阻碍了空洞的长大和连接,因而大大提高了蠕变裂纹扩展抗力。
关键词: 蠕变 , crack growth , grain boundary carbide , cavity , Fe-Cr15-Ni25 alloy
WANG Fugang ZHU Suming ZHU Shijie REN Xiaomin TAN Yi ZHANG Junshan Dalian University of Technology , Dalian , China
金属学报(英文版)
Creep crack growth behavior of Fe-Cr15-Ni25 alloys with different grain boundary features has been studied.Cavities nucleate at triple junctions of grain boundaries for the single phase alloy and at grain boundary carbide for the alloy with grain boundary carbide.Grain bounda- ry carbide particles are obstacles to cavity growth and coalescence,and therefore increase the creep crack growth resistance greatly.
关键词: creep , null , null , null , null
