Stability of TiAl in the Ti-Al-Cr system

被引:39
作者
Jewett, TJ
Ahrens, B
Dahms, M
机构
[1] TECH UNIV HAMBURG,DEPT MAT SCI & TECHNOL,D-21073 HAMBURG,GERMANY
[2] FLENSBURG POLYTECH INST,D-24943 FLENSBURG,GERMANY
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 225卷 / 1-2期
关键词
Ti-Al-Cr ternary system; TiAl; invariant reaction; isothermal sections;
D O I
10.1016/S0921-5093(96)10841-8
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The solubility of Cr in TiAl, at 1000 and 80O degrees C, in the Ti-Al-Cr ternary system is examined. Based on the results, partial isothermal sections, showing the relationship of TiAl with the neighboring phases have been constructed. The solubility of TiAl increases into the ternary with increasing Al content at 1000 degrees C, to a maximum of about 8 at.% Cr. At 800 degrees C, the maximum solubility of TiAl is about 4.5 at.% Cr. The separation of the beta/B2 phase field into the beta(Cr) and B2 phase regions is examined. The phase separation temperature was found to be about 1100 degrees C. Finally, the data from the current study is combined with information from the literature to construct isothermal sections of the Ti-Al-Cr system at 1000 and 800 degrees C. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:29 / 37
页数:9
相关论文
共 26 条
[1]   MICROSTRUCTURE OF ALUMINA-FORMING OXIDATION-RESISTANT AL-TI-CR ALLOYS [J].
BRADY, MP ;
SMIALEK, JL ;
TEREPKA, F .
SCRIPTA METALLURGICA ET MATERIALIA, 1995, 32 (10) :1659-1664
[2]  
BRADY MP, 1995, HIGH TEMPERATURE ORD, V7, P1309
[3]  
CLEMENS H, 1993, STRUCTURAL INTERMETALLICS, P205
[4]  
DAHMS M, 1994, ADV PERFORM MATER, V1, P161
[5]  
ENCE E, 1960, BINARY TERNARY DIAGR, P1
[6]  
GAMA S, 1988, TERNARY ALLOYS COMPR, V4
[7]  
HAO S, 1995, ACTA METALL SIN, V31, pB152
[8]  
HASHIMOTO K, 1993, STRUCTURAL INTERMETALLICS, P309
[9]  
HUANG SC, 1993, STRUCTURAL INTERMETALLICS, P299
[10]  
HUANG SC, 1991, MICROSTRUCTURE / PROPERTY RELATIONSHIPS IN TITANIUM ALUMINIDES AND ALLOYS, P105