摘要
对有序金属间化合物(Fe_(60)Ni_(40))_3(V_(98)Ti_2)的蠕变断裂行为进行了初步研究。用透射电镜观察了稳态蠕变过程中位错亚结构的变化,发现存在大量的堆垛层错和成对位错以及较高密度的位错网络。对断口及近断口剖面的扫描电镜观察指出,晶界上空洞所形成的沿晶断裂是(Fe_(60)Ni_(40))_3(V_(98)Ti_2)蠕变断裂的主要机制。
The creep fracture behaviour of intermetallic compound (Fe_(60)Ni_(40))_3(V_(98)Ti_2) has
been studied under 187, 200, 215 and 248 MPa at 923 K. The variation of dislocation substruc-
ture is observed with TEM in the process of steady-state creep. It is found that there exists
a large amount of stacking faults, dislocation pairs and also high density dislocation networks.
SEM analysis of section near fracture surface points out that intergranular crack due to coale-
scence of small cavities is the main creep fracture mechanism of intermetallic compound
(Fe_(60)Ni_(40))_3(V_(98)Ti_2).
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第4期A311-A314,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
金属间化合物
蠕变
断裂
intermetallic compound
(Fe_(60)Ni_(40))_3(V_(98)Ti_2)
creep
creep fracture
