摘要
研究了石墨片混乱度Ｓ＝０的Ｆｅ—Ｃ合金和球墨铸铁在不同受力状态下的裂纹扩展现象，以及基体组织对断裂形貌的影响。试验发现：当裂纹遇到与其平行的片状石墨时，裂纹将在石墨内部以（０００１）面之间的解理而扩展；当裂纹遇到与其垂直的片状石墨时，裂纹将沿石墨／基体界面处扩展，也即界面的脱粘；当裂纹遇到球状石墨时，裂纹上要在二次石墨中前进。裂纹在铁素体－下贝氏体中时以在铁素体中的扩展为主。
The fracture behaviour of cast irons with graphite irregularity S=0 and spheroidal graphite iron under three different stress modes was investigated.When the crack was parallel or vertical to the graphite flakes,it would be developed along inside the graphite flakes,i, e the cleavage of(0001) plane of graphite flakes,or propagated along the matrix/graphite interface,i, e decohension between graphite flake and matrix respectively.In the case of spheroidal graphite cast iron with ferrite-bainite matrix,the crack would propagate mainly in ferrite and secondary graphite.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第8期A374-A379,共6页
Acta Metallurgica Sinica
关键词
片状石墨
球状石墨
裂纹扩展
铸铁
Fe-C alloy,flake graphite,spheroidal graphite,crack propagation,cast iron
