山东科学2018，Vol.31Issue(1)：48-54,7.DOI:10.3976/j.issn.1002-4026.2018.01.009
TiAl-Nb合金相平衡转变及显微组织结构研究
Study on equilibrium phase transformation and microstructure of TiAl-Nb alloy
方春梅 1徐勇 1许斌 1袁乃强1
作者信息
- 1. 山东建筑大学材料科学与工程学院,山东济南250101
- 折叠
摘要
Abstract
The phase composition and microstucture characteristics of Ti-Al and Ti-Al-Nb alloys were analyzed by qualitative and quantitative X-ray diffraction and optical micrscopic methods.The effects of Nb addition in Ti-Al alloys on phase composition of Ti-Al-Nb alloy,grain size and distribution were also investigated.It was found that Nb addition could dramatically improve the stability of β and α2 phases,while the precipitation of α and γ phases was hindered as Nb addition.Meanwhile,the area of α2+γ two-phase region was enlarged,and the γ phase region was made to shift to the right.Furthermore,the grain size of Ti-Al-Nb alloys was significantly refinded by Nb addition within a specific composition range.关键词
高Nb-TiAl合金/平衡相转变/显微组织结构Key words
high Nb-TiAl alloys/equilibrium phase transformations/microscopic structure分类
矿业与冶金引用本文复制引用
方春梅,徐勇,许斌,袁乃强..TiAl-Nb合金相平衡转变及显微组织结构研究[J].山东科学,2018,31(1):48-54,7.
