Hardening mechanism of MP159 alloy induced by aging

来源期刊：中国有色金属学报(英文版)2002年第2期

论文作者：鲁世强 黄伯云 贺辉 唐建成

文章页码：256 - 259

Key words：aging; hardening mechanism; MP159 alloy; cubic γ′ phase

Abstract: The microstructural changes of both solution heat treated (ST) and cold worked (CW) MP159 alloy during aging were investigated by optical microscopy and transmission electron microscopy (TEM). The results indicate that both solution heat treated (ST) and cold worked (CW) MP159 alloy could be hardened by aging. This aging induced hardening is attributable to the precipitation of a very finely dispersed ordered cubic γ′ phase particles with only several nanometres in diameter. The hexagonal close packed (HCP) ε-martensite precipitated during aging of both CW MP159 and CW MP35N, and the hexagonal ordered Co₃Mo phase of the DO₁₉ structure type precipitated during aging of CW MP35N, have not bee n found in the present investigation.