DD100镍基单晶合金的高温断裂分析  

ANALYSIS OF THE HIGH-TEMPERATURE FRACTURE OF Ni-BASED SINGLE CRYSTAL SUPERALLOY DD100

作　　者：周灿栋[1] 董显平[1] 郁金星[1] 张源虎[1] 孙传棋[2] 刘泽尧 李其娟 吴昌新 

机构地区：[1]上海交通大学 [2]北京航空材料研究院

出　　处：《航空材料学报》1997年第1期23-30,共8页Journal of Aeronautical Materials

摘　　要：通过对DD100单晶合金组织、断裂等方面的研究，探讨了影响单晶的断裂延性的因素。当DD100单晶合金中加入适量Hf元素后，单晶合金中无明显的疏松孔洞，γ／γ'共晶数量增加。发生瞬间断裂的不含Hf元素的试样中存在亚晶界、疏松孔洞以及γ／γ'共晶，但亚晶界的危害超过后两者。The microstructure and fracture of Ni-based single crystal DD100 and the factors of influencing the ductility of the alloy have been investigated. With an addition of Hf in DD100 alloy,no obvious porosities were found and the amount of γ/γ' eutectic was increased. Sub-boundaries,porosities and γ/γ' eutectics appear in the tensile specimens without containing Hf. It was found that the effect of sub-boundary on the properties was greater than the others.

关 键 词：镍基 高温合金 断裂 亚晶界 

分 类 号：TG113.12[金属学及工艺—物理冶金] TG111.91[金属学及工艺—金属学]