Ce和Cr对Fe_3Al室温力学性能的影响  

EFFECTS OF Ce AND Cr ON ROOM TEMPERATURE MECHANICAL PROPERTIES OF Fe_3 Al

作　　者：孙扬善[1] 郭军[1] 张力宁[1] 张谨平 

机构地区：[1]东南大学

出　　处：《金属学报》1991年第4期A255-A260,共6页Acta Metallurgica Sinica

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.

关 键 词：FE3AL合金 金属间化合物 力学性能 

分 类 号：TG141[一般工业技术—材料科学与工程]