有序化对(Fe,Ni)_3V合金环境氢脆的影响  

Effect of Ordering on Environmental Embrittlement of (Fe,Ni)_3V

作　　者：朱再飞[1] 陈业新[1] 万晓景[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《上海大学学报（自然科学版）》2005年第5期522-526,539,共6页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50371050)

摘　　要：研究了室温下不同有序度的(Fe,Ni)3V在真空、空气和氢气中的力学性能.结果表明:不同有序度的(Fe,Ni)3V均不存在空气中水气诱发的环境氢脆;无序态(Fe,Ni)3V在氢气环境下存在轻微的脆性;而有序态在氢气中有强烈的脆化作用,其脆性随有序化程度提高而增加.扫描电镜观察表明:无序态合金在不同气氛中断裂时全部为韧性断口;有序态合金在空气和真空中基本上也为穿晶韧性断口,但在氢气中的断口形貌大部分为脆性断口.Mechanical properties of disordered and ordered （Fe, Ni）3V in vacuum, air and hydrogen have been investigated at room temperature. The results show that there is no moisture-induced environmental embrittlement for the disordered and ordered （Fe, Ni）3V when tested in air. The results also indicate that a small degree of H2-induced environmental embrittlement was observable for the disordered （Fe, Ni）3V when tested in gaseous hydrogen. However, the ordered （Fe, Ni）3V is very sensitive to gaseous H2-induced environmental embrittlemen, and the embrittlement becomes severer as the degree of order increases. The fracture surface observation shows that the fracture modes of disordered （ Fe, Ni）3V in the above three environments are ductile transgranularly, The fracture modes of ordered （Fe, Ni）3V in vacuum and air are almost ductile. However, the fracture mode of ordered （Fe, Ni）3V in H2 is mostly brittle,

关 键 词：(Fe Ni)3V 无序态 有序态 环境氢脆 

分 类 号：TG172[金属学及工艺—金属表面处理] TG146.1[金属学及工艺—金属学]