A UNIFIED SOLUTE DIFFUSION-MODEL FOR COLUMNAR AND EQUIAXED DENDRITIC ALLOY SOLIDIFICATION

被引：116

作者：

WANG, CY

BECKERMANN, C

机构：

[1] Department of Mechanical Engineering, The University of Iowa, Iowa City

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 171卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90407-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A unified solute diffusion model is proposed for columnar and equiaxed dendritic alloy solidification, in which nucleation, growth kinetics and dendrite morphology are taken into account. Various applications to a uniformly solidified system are demonstrated, with emphasis on three special cases: complete solute mixing in the liquid, columnar growth with significant dendrite tip undercooling, and equiaxed dendritic growth. Theoretical predictions of microsegregation, eutectic fractions and cooling curves are compared with a number of previous theoretical and experimental results, and good agreement is found.

引用

页码：199 / 211

页数：13

共 37 条

[1]

AHUJA S, 1992, ASME HTD218 PUBL, P85

[2] MATHEMATICAL-MODELING OF MICROSEGREGATION IN BINARY METALLIC ALLOYS [J].

BATTLE, TP ;

PEHLKE, RD .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1990, 21 (02) :357-375

[3]

BENDERSKY LA, 1985, RAPIDLY QUENCHED MET, V1, P887

[4]

BRODY HD, 1966, T METALL SOC AIME, V236, P615

[5]

BURDEN MH, 1974, J CRYST GROWTH, V22, P109, DOI 10.1016/0022-0248(74)90127-4

[6] SOLUTE REDISTRIBUTION DURING SOLIDIFICATION WITH RAPID SOLID-STATE DIFFUSION [J].

CLYNE, TW ;

KURZ, W .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1981, 12 (06) :965-971

[7]

DUSTIN I, 1986, Z METALLKD, V77, P265

[8]

FLEMINGS MC, 1990, CIM AN CONF, P173

[9] BEHAVIOR OF METAL-ALLOYS IN THE SEMISOLID STATE [J].

FLEMINGS, MC .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (05) :957-981

[10] A MODEL OF A CASTING [J].

FLOOD, SC ;

HUNT, JD .

APPLIED SCIENTIFIC RESEARCH, 1987, 44 (1-2) :27-42

← 1 2 3 4 →