摘要
Fe_3Al中加入少量的Ce,室温强度显著增高,而同时加入Ce和Cr,则可使强度和塑性均得到改善。含Ce的Fe_3Al其断口有大约70％的穿晶解理能断裂和30％的沿晶断裂。在Fe_?Al的形变试样中,观察到的主要是b=1/4a′_0〈111〉的单根位错。但含Cr的合金的形变试样中则可观察到大量的超点阵位错。
An addition of small amount Ce to Fe_3Al increases significantly the
room temperature strength, and a mixed addition of Ce and Cr improves both strength
and ductility. The fracture mode of Fe_3Al containing Ce is a mixed one of ap-
proximately 70% transgranular cleavage and 30% intergranular failure. The disloca-
tions observed are mainly single ones with b=1/4a′_0<111> in the deformed specimens
of bare binary Fe_3Al, but a number of super-lattice dislocations in that with Cr
added.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第4期A255-A260,共6页
Acta Metallurgica Sinica
关键词
FE3AL合金
金属间化合物
力学性能
Fe_3Al
intermetallics
mechanical property
superlattice dislocation
