Influence of boron on mechanical properties of M951 alloy
来源期刊：中国有色金属学报(英文版)2005年第z3期
论文作者：周鹏杰 于金江 孙晓峰 管恒荣 胡壮麒
文章页码：86 - 89
Key words：boron； superalloy； M951 alloy； stress-rupture life； ductility
Abstract: It is generally agreed that appropriate content of boron is beneficial to mechanical properties of many superalloys. In an effort to improve stress rupture properties of a new superalloy M951, the content of boron is optimized. Stress rupture tests were carried out using a FC-20 high temperature creep testing machine. The micro- structure, fracture surface and dislocation structure were investigated by optical microscopy, scanning electron microscopy and transmitting electron microscopy. The results indicate that the addition of boron improves the stress-rupture life at 1100℃ and 40MPa, but does not affect elongation remarkably. The stress-rupture life is the longest when the content of boron is 0.024%. Boron also enhances the tensile ductility and has no obvious effect on the tensile strength.
