Grain refinement of aluminum alloys

被引：0

作者：

Greer, AL ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

SOLIDIFICATION OF ALUMINUM ALLOYS | 2004年

关键词：

casting; aluminum alloys; grain refinement; growth; inoculation; nucleation; poisoning;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A better understanding of the mechanisms of grain refinement can contribute to the development of better refiners and to improved industrial practice. Recent studies of refinement mechanisms are reviewed, focusing on grain initiation on nucleant particles and on the effects of solute content in the melt. Microscopical studies of nucleant particles have been particularly useful in analyzing the adverse (poisoning) effects of certain solutes. Using a particular model for grain initiation, quantitative predictions can be made for the variation of as-cast grain size with alloy composition, refiner addition level, and cooling rate. Comparison is made with results from small-scale tests and full-scale DC casting. Possibilities for improvement of refiners are assessed, and some areas requiring further research are highlighted.

引用

页码：131 / 145

页数：15

共 38 条

[1] DIFFUSION-LIMITED PHASE TRANSFORMATIONS - A COMPARISON AND CRITICAL EVALUATION OF MATHEMATICAL APPROXIMATIONS [J].

AARON, HB ;

FAINSTEIN, D ;

KOTLER, GR .

JOURNAL OF APPLIED PHYSICS, 1970, 41 (11) :4404-+

[2]

ALTENPOHL D, 1955, Z METALLKD, V46, P535

[3] Grain refinement by Al-Ti-B alloys in aluminium melts: a study of the mechanisms of poisoning by zirconium [J].

Bunn, AM ;

Schumacher, P ;

Kearns, MA ;

Boothroyd, CB ;

Greer, AL .

MATERIALS SCIENCE AND TECHNOLOGY, 1999, 15 (10) :1115-1123

[4]

BUNN AM, 1997, P 4 DEC INT C SOL PR, P264

[5] EMBEDDED DROPLET MEASUREMENTS AND AN ADSORPTION MODEL OF THE HETEROGENEOUS NUCLEATION OF SOLIDIFICATION [J].

CANTOR, B .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1994, 178 (1-2) :225-231

[6] Ordering in a fluid inert gas confined by flat surfaces [J].

Donnelly, SE ;

Birtcher, RC ;

Allen, CW ;

Morrison, I ;

Furuya, K ;

Song, MH ;

Mitsuishi, K ;

Dahmen, U .

SCIENCE, 2002, 296 (5567) :507-510

[7]

Easton MA, 2001, LIGHT MET, P927

[8] A COUPLED FINITE-ELEMENT CELLULAR-AUTOMATON MODEL FOR THE PREDICTION OF DENDRITIC GRAIN STRUCTURES IN SOLIDIFICATION PROCESSES [J].

GANDIN, CA ;

RAPPAZ, M .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (07) :2233-2246

[9]

Granger DA, 1998, LIGHT METALS 1998, P941

[10] THE OCCURRENCE, EFFECT, AND CONTROL OF TWINNED COLUMNAR GROWTH IN ALUMINUM-ALLOYS [J].

GRANGER, DA ;

LIU, J .

JOURNAL OF METALS, 1983, 35 (06) :54-59

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