Microstructural evolution of a forged TiAl based alloy during heat treatment at subtransus temperature
来源期刊:中国有色金属学报(英文版)2000年第2期
论文作者:唐建成 黄伯云 刘文胜 贺跃辉
文章页码:183 - 186
Key words:TiAl base alloy; heat treatment; microstructure
Abstract: Microstructural evolution of a forged TiAl based alloy during heat treatment from 1180℃ to 1300℃ was investigated. The grain sizes of the alpha phases as well as the sizes and the volume fractions of the gamma phases were evaluated as a function of heat treatment temperature and time. When the alloys are isothermally heat treated at subtransus temperatures, the sizes of gamma phases(Dγ) increase slightly with heat treatment temperature and time and those of alpha phases(Dα) and the volume fractions of gamma phases(φγ) vary significantly with holding time in the early stages of heat treatments, but after heat treatments for 2 h,φ