APPLICATION OF DISORDER TRAPPING THEORY TO THE SOLIDIFICATION OF NI3AL

被引：16

作者：

ASSADI, H

GREER, AL

机构：

[1] University of Cambridge, Department of Materials Science and Metallurgy, Cambridge CB2 3QZ, Pembroke Street

来源：

ISIJ INTERNATIONAL | 1995年 / 35卷 / 06期

关键词：

SOLIDIFICATION; ORDER DISORDER; INTERMETALLIC COMPOUNDS; NI3AL; DISORDER TRAPPING; DENDRITE GROWTH;

D O I：

10.2355/isijinternational.35.574

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A numerical analysis is presented of the solidification of compositions close to Ni3Al. A two-sublattice thermodynamic model for the gamma and gamma' phases is combined with disorder trapping theory and dendrite growth modelling based on the marginal stability hypothesis. It is thereby possible to predict the composition and degree of order in the growing solid as a function of liquid composition and undercooling. Preliminary results are presented on solidification of the liquid of composition Ni-25at%Al.

引用

页码：574 / 579

页数：6

共 13 条

[1] THERMODYNAMIC MODELING OF ORDERED PHASES IN THE NI-AL SYSTEM [J].

ANSARA, I ;

SUNDMAN, B ;

WILLEMIN, P .

ACTA METALLURGICA, 1988, 36 (04) :977-982

[2]

ANSARA I, IN PRESS

[3]

ASSADI H, IN PRESS T TECH

[4]

BAKER JC, 1970, SOLIDIFICATION, P23

[5]

BARTH M, 1994, MAT SCI ENG A-STRUCT, V178, P171

[6] THEORY FOR THE TRAPPING OF DISORDER AND SOLUTE IN INTERMETALLIC PHASES BY RAPID SOLIDIFICATION [J].

BOETTINGER, WJ ;

AZIZ, MJ .

ACTA METALLURGICA, 1989, 37 (12) :3379-3391

[7] THE ORDER-DISORDER TRANSFORMATION IN NI3AL AND NI3AL-FE ALLOYS .1. DETERMINATION OF THE TRANSITION-TEMPERATURES AND THEIR RELATION TO DUCTILITY [J].

CAHN, RW ;

SIEMERS, PA ;

GEIGER, JE ;

BARDHAN, P .

ACTA METALLURGICA, 1987, 35 (11) :2737-2751

[8]

CORIELL SR, 1982, ACTA METALL, V30, P135

[9] RAPID DENDRITE GROWTH IN UNDERCOOLED ALLOYS [J].

LIPTON, J ;

KURZ, W ;

TRIVEDI, R .

ACTA METALLURGICA, 1987, 35 (04) :957-964

[10] SOLIDIFICATION MORPHOLOGIES IN DIRECTIONALLY SOLIDIFIED SUPERALLOYS [J].

QUESTED, PN ;

MCLEAN, M .

MATERIALS SCIENCE AND ENGINEERING, 1984, 65 (01) :171-180

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