Influence of Sr and Mn additions on intermetallic compound morphologies in Al-Si-Cu-Fe cast alloys

被引：61

作者：

Ashtari, P ^{[1
]}

Tezuka, H

Sato, T

机构：

[1] Tokyo Inst Technol, Dept Met & Ceram Sci, Tokyo 1528552, Japan

[2] Tokyo Inst Technol, Dept Met & Ceram Sci, Tokyo 1528552, Japan

来源：

MATERIALS TRANSACTIONS | 2003年 / 44卷 / 12期

关键词：

aluminum-silicon alloys; strontium addition; intermetallic compounds; modification;

D O I：

10.2320/matertrans.44.2611

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of Sr or Sr and Mn combined additions on the Fe-containing intermetallic compounds in Al-Si-Cu-Fe cast alloys has been investigated using Al-6.5%Si-3.5%Cu-1.0%Fe and Al-6.5%Si-3.5%Cu-1.0%Fe-0.3%Mn alloys (in mass%) with a similar composition to the 319 aluminum alloy. The results show that Sr successfully modifies the large, highly branched beta-needle-like phase (beta: Al5FeSi) into the individual, less-branched and finer one. The combined addition of Mn and Sr results in modification of the needle-like beta-phase as well as promotion of Chinese script and sludge morphology formation. The mechanism of the above morphological changes has been discussed in accordance with the mechanism of nucleation and growth of the beta-needle-like phase during solidification.

引用

页码：2611 / 2616

页数：6

共 11 条

[1]

BACKERUD L, 1990, SOLIDIFICATION CHARA, V2, P84

[2]

Crosley PB, 1966, MOD CAST, V49, P89

[3]

IGARASHI Y, 2001, 139 JFS M, P57

[4] THE MECHANISM OF SILICON MODIFICATION IN ALUMINUM-SILICON ALLOYS - IMPURITY INDUCED TWINNING [J].

LU, SZ ;

HELLAWELL, A .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1987, 18 (10) :1721-1733

[5]

Mondolfo LF, 1978, ALUMINUM ALLOYS STRU, P678

[6] Effect of Mg on the ageing behaviour of Al-Si-Cu 319 type aluminium casting alloys [J].

Ouellet, P ;

Samuel, FH .

JOURNAL OF MATERIALS SCIENCE, 1999, 34 (19) :4671-4697

[7] Observations on the formation of beta-Al5FeSi phase in 319 type Al-Si alloys [J].

Samuel, AM ;

Samuel, FH ;

Doty, HW .

JOURNAL OF MATERIALS SCIENCE, 1996, 31 (20) :5529-5539

[8] Effect of Mg and Sr additions on the formation of intermetallics in Al-6 wt pct Si-3.5 wt pct Cu-(0.45) to (0.8) wt pct Fe 319-type alloys [J].

Samuel, FH ;

Ouellet, P ;

Samuel, AM ;

Doty, HW .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (12) :2871-2884

[9]

SIGWORTH GK, 1989, AFS T, V97, P811

[10]

SIGWORTH GK, 1987, MOD CAST, V77, P23

← 1 2 →