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
出处
《材料工程》
EI
CAS
CSCD
北大核心
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
关键词
镍基单晶高温合金
DD100
显微组织
断裂分析
nickel-based single crystal superalloy
eutectic
island-like microstructure
microporosity
