镍基单晶高温合金DD100的显微组织和断裂分析  

Fracture and Microstructure Analysis of Nickel based Single Crystal Superalloy DD100

作　　者：周灿栋[1,2] 郁金星[1] 张源虎[1] 杨正瑞 蒋国昌[2] 

机构地区：[1]上海交通大学，上海 200030 [2]上海大学，上海 200072

出　　处：《材料工程》2000年第11期38-40,44,共4页Journal of Materials Engineering

基　　金：中科院腐蚀与防护研究所重点资助项目

摘　　要：对 DD10 0单晶合金进行了显微组织分析 ,结果表明 ,DD10 0单晶显微组织内存在弥散分布的岛状组织、边缘具有白色亮带的 γ/γ′共晶和显微疏松孔洞 ;共晶边缘、岛状组织和显微疏松孔洞既是裂纹萌生比较有利的位置 。the microstructure of DD100 single crystal superalloy has been analyzed The results show that there are many γ/γ′ eutectic with γ′ depleted white band and many island like microstructures distributing dispersingly on the γ/γ′ microstructure There also exists much microporosity in the microstructure The margin of the γ/γ′ eutectics and island like microstructures and microporosity in DD100 are the sites which are favorable for the initiating of the cracks and are also the easy ways for the crack propagation

关 键 词：镍基单晶高温合金 DD100 显微组织 断裂分析 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG132.32[金属学及工艺—金属材料]