The role of solute in grain refinement of magnesium

被引：906

作者：

Lee, YC ^{[1
]}

Dahle, AK ^{[1
]}

StJohn, DH ^{[1
]}

机构：

[1] Univ Queensland, Dept Min Minerals & Mat Engn, CRC Cast Met Mfg, CAST, Brisbane, Qld 4072, Australia

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2000年 / 31卷 / 11期

关键词：

D O I：

10.1007/BF02830349

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of separate solute additions of Al, Zr, Sr, Si, and Ca on grain size of Mg has been investigated. Increasing the Al content in hypoeutectic Mg-Al alloys resulted in a continuous reduction in grain size up to 5 wt pet Al, reaching a relatively constant grain size for higher Al contents (above 5 wt pet). The effect of Sr additions was investigated in both low- and high-Al content magnesium alloys, and it was found that Sr had a significant grain refining effect in low-Al containing alloys but a negligible effect on grain size in Mg-9Al. Additions of Zr, Si, and Ca to pure magnesium resulted in efficient grain refinement. The grain refinement is mainly caused by their growth restriction effects, i.e., constitutional undercooling, during solidification, but the effect of nucleant particles, either introduced with the alloying additions or as secondary phases formed as a result of these additions, may enhance the grain refinement. A brief review of grain refinement of magnesium alloys is included in this article to provide an update on research in this field.

引用

页码：2895 / 2906

页数：12

共 22 条

[1]

Backerud L, 1996, LIGHT METALS 1996, P679

[2]

BUSK RS, 1945, T AM I MIN MET ENG, V161, P266

[3] Mechanical properties and structure of ignition-proof Mg-Ca-Zr alloys produced by squeeze casting [J].

Chang, SY ;

Tezuka, H ;

Kamio, A .

MATERIALS TRANSACTIONS JIM, 1997, 38 (06) :526-535

[4]

Davis J.A., 1945, T AM FOUNDRYMENS SOC, V53, P352

[5] Grain refinement of aluminum alloys: Part I. The nucleant and salute paradigms - A review of the literature [J].

Easton, M ;

StJohn, D .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (06) :1613-1623

[6] Grain refinement of aluminum alloys: Part II. Confirmation of, and a mechanism for, the solute paradigm [J].

Easton, M ;

StJohn, D .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (06) :1625-1633

[7]

EMLEY EF, 1966, PRINCIPLES MAGNESIUM, P260

[8]

GLASSON EL, 1968, SOLIDIFICATION METAL, P1

[9]

GRUZLESKI JE, 1992, Patent No. 5143564

[10]

Hall H., 1945, MAGNES REV ABS, V3, P68

← 1 2 3 →