Macro- and microstructure analysis of SSM A356 produced by electromagnetic stirring

被引：63

作者：

Zoqui, EJ

Paes, A

Es-Sadiqi, E

机构：

[1] Univ Estadual Campinas, Fac Mech Engn, Dept Mfg Engn, BR-13081970 Campinas, SP, Brazil

[2] CANMET NRCan, Mat Technol Lab, Nat Resources Canada, Ottawa, ON, Canada

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2002年 / 120卷 / 1-3期

基金：

巴西圣保罗研究基金会;

关键词：

rheocast; aluminium-silicon alloys; electromagnetic stirring; microstructure; macrostructure;

D O I：

10.1016/S0924-0136(01)01148-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The objective of this work is to present the relationship between macro- and microstructure of the rheocast alloy A356 obtained by electromagnetic stirring. There is a direct relationship between grain size (macrostructure) and globule size/shape factor (microstructure): the smaller the grain size, the smaller are the globule size and shape factor. The A356 alloy was processed in a simple device, which constitutes a semi-continuous casting system, coupled with a power source. The A356 (Al-7.0 wt.%Si) alloy was electromagnetically stirred under different cooling rates (controlled by the casting speed of 1 and 3 cm/s) and different power levels (600-1200 W). Ingots with 45 mm of diameter and 3 kg with very refined and homogeneous rheocast structures were obtained. The direct relationship between macro- and microstructures of the ingots were exploited. A quality index is proposed to better characterise the rheocast structure. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：365 / 373

页数：9

共 14 条

[1] SPECIAL GRAIN-BOUNDARIES IN RHEOCAST AL-MG [J].

APAYDIN, N ;

PRABHAKAR, KV ;

DOHERTY, RD .

MATERIALS SCIENCE AND ENGINEERING, 1980, 46 (02) :145-150

[2]

BLAIS S, 1996, P 4 INT C SEM PROC A, P187

[3]

DOSSANTOS EG, 2000, THESIS STATE U CAMPI

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

FLEMINGS, MC .

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

[5]

Ito Y, 1992, P TMS S NAT PROP SEM, P3

[6] Microstructural evolution during partial remelting of Al-Si7Mg alloys [J].

Loue, WR ;

Suery, M .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1995, 203 (1-2) :1-13

[7] 3D study of the structure of primary crystals in a rheocast Al-Cu alloy [J].

Niroumand, B ;

Xia, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 283 (1-2) :70-75

[8]

NOROUMANDI B, 1998, P 5 INT C SEM PROC A, P637

[9]

PAES M, 2000, P 6 C SEM SOL PROC A, P693

[10]

SALVO L, 1996, P 4 INT C SEM PROC A, P10

← 1 2 →