摘要
在760℃,850℃和980℃温度条件下,研究了DD6单晶高温合金扭转小角度晶界的横向拉伸性能和断裂特征。结果表明,相同晶界角度的试样,随着温度的升高,DD6单晶高温合金拉伸强度降低。在760℃,850℃和980℃三个温度下,晶界角度分别为10.8,°6.4,°3.8°时,试样出现沿晶断裂,小角度晶界试样的拉伸强度降低。小角度晶界试样沿晶断裂明显降低试样的拉伸塑性。
The transverse tensile properties and fracture behaviour of the twist low angle boundary of DD6 single crystal superalloy were investigated at 760℃ , 850℃ and 980℃. The transverse tensile strength of the specimens with the same twist LAB decreases with the increasing of temperature. When the LAB of the specimen is 10.8° at 760℃ , 6.4° at 850℃ and 3.8° at 980℃ respectively, intergranular rupture can be observed and the tensile strength decreases. The intergranular rupture mode makes the tensile plastic of the specimen decrease.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2009年第3期88-92,共5页
Journal of Aeronautical Materials
关键词
DD6
单晶高温合金
小角度晶界
拉伸性能
DD6
single crystal superalloy
low angle boundary
tensile properties
