孙扬善
,
郭军
,
张力宁
,
张谨平
金属学报
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。
关键词:
Fe_3Al
,
intermetallics
,
mechanical property
,
superlattice dislocation
SUN Yangshan GUO Jun ZHANG Lining ZHANG Jinping Southeast University
,
Nanjing
,
China
金属学报(英文版)
Small amount addition of Ce to Fe_3Al results in a significant increase of room temperature strength of the alloy,and the combined addition of Ce and Cr improves both strength and ductility.The fracture mode of Fe_3Al containing Ce is a mixed one of approximately 70% transgranular cleavage and 30% intergranular failure.In the deformed specimens of binary Fe_3Al the dislocations observed are mainly single dislocations with =(1/4)a_0~'〈111〉. However,a number of superlattice dislocations can be observed in the deformed specimens of the alloys with Cr addition.
关键词:
Fe_3Al
,
null
,
null
,
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