Experimental study of phase equilibria in the Nb-Ti-Al system

被引：21
作者：
Chaumat, V [1 ]
Ressouche, E
Ouladdiaf, B
Desre, P
Moret, F
机构：
[1] CEA, CEREM, DEM, Serv Mat Engn, F-38054 Grenoble 9, France
[2] CEA, DRFMC, SPSMS MDN, F-38054 Grenoble, France
[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[4] Ecole Natl Super Electrochim & Electrome Grenoble, LTPCM, F-38402 St Martin Dheres, France
来源：
SCRIPTA MATERIALIA | 1999年 / 40卷 / 08期
关键词：
D O I：
10.1016/S1359-6462(99)00032-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The phase equilibria of polycrystalline Nb-Ti-Al alloys were studied using neutron diffraction experiments. Results indicated strong influence of the alloy composition on the order-disorder transition of the metal. B2→A2 transition occurred at 1200 K (±5) for the composition Ti30-Nb55-Al15 (at.%) and occurred below 873 K for the close concentration Ti30-Nb60-Al10 (at.%). The transition temperature of Ti-rich composition Ti53-Nb20-Al27 (at.%) was higher at 1455 K (±5). These results were validated by cluster variation calculations.
引用
收藏
页码：905 / 911
页数：7
相关论文
共 14 条
[1]   MAXIMUM-LIKELIHOOD METHODS IN POWDER DIFFRACTION REFINEMENTS [J].
ANTONIADIS, A ;
BERRUYER, J ;
FILHOL, A .
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 1990, 46 :692-711
[2]   COHERENT PRECIPITATES IN THE BCC ORTHORHOMBIC 2-PHASE FIELD OF THE TI-AL-NB SYSTEM [J].
BENDERSKY, LA ;
BOETTINGER, WJ ;
ROYTBURD, A .
ACTA METALLURGICA ET MATERIALIA, 1991, 39 (08) :1959-1969
[3]  
CHAUMAT V, IN PRESS J PHASE EQU
[4]  
CHAUMATJACOB V, 1996, THESIS INPG GRENOBLE
[5]  
HELLWIG A, 1990, THESIS U DORTMUND
[6]   The ordering scheme in N-B aluminides with the B2 crystal structure [J].
Hou, DH ;
Fraser, HL .
SCRIPTA MATERIALIA, 1997, 36 (06) :617-623
[7]   PHASE-EQUILIBRIA IN NIOBIUM RICH NB-AL-TI ALLOYS [J].
MENON, ESK ;
SUBRAMANIAN, PR ;
DIMIDUK, DM .
SCRIPTA METALLURGICA ET MATERIALIA, 1992, 27 (03) :265-270
[8]   Phase transformations in Nb-Al-Ti alloys [J].
Menon, ESK ;
Subramanian, PR ;
Dimiduk, DM .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (06) :1647-1659
[9]  
NAKA S, 1993, 1 INT S STRUCT INT 2
[10]  
PEREPEZKO JH, 1989, HIGH TEMPERATURE ALU
12