【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.更多还原

【Abstract】 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.更多还原