摘要
利用ＴＥＭ原位观察技术研究了充氢Ｎｉ_３Ａｌ｛１１０｝型解理断裂裂纹萌生、扩展过程。发现｛１１０｝型解理裂纹的萌生是由于｛１１１｝型主裂纹前端位错塞积产生的局部应力集中造成的，且氢的存在降低了｛１１０｝面的解理能。
The {110} cleavage fracture of Ni_3Al after charging hydrogen has been investigated by in situ TEM observation technique. The dislocations which piled up at the {111} crack tip generate high stress concentration to nucleate microcrack in {110}. In addition,hydrogen decrease the cohension of {110}
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第7期A331-A336,共6页
Acta Metallurgica Sinica
关键词
NI3AL
解理断裂
金属互化物
Ni_3Al, intermetallic compound, cleavage, dislocation piling up
