航空材料学报2026，Vol.46Issue(8)：58-65,8.DOI:10.11868/j.issn.1005-5053.2026.000105
小角度晶界对一种第三代单晶高温合金760～980℃拉伸行为的影响
Effects of low angle boundaries on tensile behaviors of a third generation single crystal superalloy at 760-980℃
杨万鹏 1李嘉荣 1赵金乾 1喻健 1王效光 1刘世忠 1陈巧1
作者信息
- 1. 中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095
- 折叠
摘要
Abstract
The influence of low angle boundaries(LABs)on the tensile behavior of a third generation single crystal superalloy at temperatures of 760,850℃,and 980℃has been explored.The microstructure of the specimens after tensile rupture is examined using scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The findings reveal that the third generation single crystal superalloy with LABs demonstrates favorable tensile properties.LABs with angles ranging from 0° to 8.9° have a negligible impact on the yield strength and ultimate tensile strength of the alloy at 760,850℃,and 980℃.At 980℃,the tensile strength of the specimen with LABs of 11.4° decreases by 80 MPa compared to that of the specimen with LABs of 0°.As the angle of the LABs increases,the elongation of the alloy with LABs in the range of 0°-11.4° at 980℃exhibits a downward trend.Additionally,the propensity for intergranular fracture in the alloy with LABs becomes more pronounced as either the angle of the LABs increases or the temperature rises.关键词
第三代单晶高温合金/小角度晶界/拉伸性能/断裂机制Key words
third generation single crystal superalloy/low angle boundaries/tensile property/fracture mechanism分类
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杨万鹏,李嘉荣,赵金乾,喻健,王效光,刘世忠,陈巧..小角度晶界对一种第三代单晶高温合金760～980℃拉伸行为的影响[J].航空材料学报,2026,46(8):58-65,8.
