Phase equilibria of the Ti-Al-Nb system at 1400 °C

被引：18
|
作者：
Xu, Shuai [1 ]
Ding, Xianfei [2 ]
Xu, Yong [3 ]
Liang, Yongfeng [1 ]
Xu, Xiangjun [4 ]
Ye, Teng [1 ]
He, Jianping [1 ]
Lin, Junpin [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Beijing Inst Aeronaut Mat, Beijing 100080, Peoples R China
[3] Shandong Jianzhu Univ, Sch Mat Sci & Engn, Jinan 250101, Shandong, Peoples R China
[4] Yangtze Normal Univ, Sch Mech & Elect Engn, Chongqing 408100, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 730卷
基金：
中国国家自然科学基金;
关键词：
TiAl alloy; Intermetallics; Phase diagram; Microstructure; Phase transformation; 1400-DEGREES-C ISOTHERMAL SECTION; THERMODYNAMIC ASSESSMENT; ALLOY; TRANSFORMATIONS; MICROSTRUCTURE; REEVALUATION;
D O I：
10.1016/j.jallcom.2017.09.326
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Phase equilibria in the Ti-Al-Nb ternary system at 1400 degrees C was established, using scanning electron microscopy (SEM), electron backscattered diffraction (EBSD) and electron probe micro- analysis (EPMA). No ternary compound was observed in this work. Compared with the calculated results, the alpha + beta + gamma three-phase region moves to higher Nb and Al contents and the sigma - beta - gamma three-phase region moves to a lower Ti content in our experimental results. The tie-triangle of sigma - delta - beta moves to lower Ti and higher Nb contents. As a result, the homogeneity range of single alpha phase hugely expands to higher Nb and Al contents and the homogeneity range of single beta phase region hugely expands to a higher Al content. The phase regions are also different with the previous reported experimental results. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：270 / 278
页数：9
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