Influence of boron-doping on the H2-induced environmental embrittlement of Ni3Fe intermetallics  

作　　者：石丹丹 陈业新 万晓景 LIU Chain Tsuan 

机构地区：[1]Institute of Materials Science, Shanghai University, Shanghai 200072, P. R. China [2]Department of Materials Science and Engineering, University of Tennessee, TN37996-2200, USA

出　　处：《Journal of Shanghai University(English Edition)》2007年第2期102-105,共4页上海大学学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos. 50371050, 50671057）

摘　　要：In this paper the tensile properties of both ordered and disordered Ni-24Fe and Ni-24Fe-0.03%B （wt%） alloys in gaseous hydrogen was investigated. The result shows that the ductility of the disordered Ni3Fe is significantly larger than that of ordered material in gaseous hydrogen. However, the ductility of ordered Ni3Fe doped with 0.03%B is nearly the same as that of disordered one indicating the obvious suppressing effect of boron on the H2-induced embrittlement. Based on the segregation behavior of boron in Ni3A1, it is proposed that the suppressing effect of boron in Ni3Fe on the H2-induced embrittlement is attributed to the segregation of boron on grain boundaries, thereby reducing the hydrogen diffusivity along the grain boundaries.In this paper the tensile properties of both ordered and disordered Ni-24Fe and Ni-24Fe-0.03%B （wt%） alloys in gaseous hydrogen was investigated. The result shows that the ductility of the disordered Ni3Fe is significantly larger than that of ordered material in gaseous hydrogen. However, the ductility of ordered Ni3Fe doped with 0.03%B is nearly the same as that of disordered one indicating the obvious suppressing effect of boron on the H2-induced embrittlement. Based on the segregation behavior of boron in Ni3A1, it is proposed that the suppressing effect of boron in Ni3Fe on the H2-induced embrittlement is attributed to the segregation of boron on grain boundaries, thereby reducing the hydrogen diffusivity along the grain boundaries.

关 键 词：hydrogen embrittlement Ni3Fe alloy boron addition 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG146.15[金属学及工艺—金属学]