Semi solid metal processing: The fraction solid dilemma

被引：31

作者：

Nafisi, S. ^{[1
]}

Emadi, D. ^{[2
]}

Ghomashchi, R.

机构：

[1] EVRAZ Inc, Regina, SK S4P 3C7, Canada

[2] Nat Resources Canada, CanmetENERGY, CEPG, Ottawa, ON K1A 1M1, Canada

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 507卷 / 1-2期

关键词：

Fraction solid; Semi-solid; Cooling rate; Thermal analysis; Image analysis; SOLIDIFICATION; ALLOYS;

D O I：

10.1016/j.msea.2008.11.052

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

One of the most challenging aspects in semi solid metal (SSM) processing is to determine the actual volume fraction of the solid at the processing temperature. The fraction has great impact on the SSM slurry viscosity and the subsequent filling of the mold in the casting stage. Three methods, namely quantitative metallography, thermodynamic calculation. and thermal analysis are employed to investigate and clarify the contradictory open literature reports about the real value of the volume fraction of primary particles. It is reported that the discrepancies between the results obtained by different methods are caused mainly by variations in cooling rates and by coarsening of the primaries during the quenching process. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：87 / 92

页数：6

共 19 条

[1]

Backerud LennartJ., 1990, SOLIDIFICATION CHARA, V2

[2] Solidification curves of Al-Cu, Al-Mg and Al-Cu-Mg alloys [J].

Chen, SW ;

Huang, CC .

ACTA MATERIALIA, 1996, 44 (05) :1955-1965

[3]

de Figueredo AM, 1998, LIGHT METALS 1998, P1103

[4] Applications of thermal analysis in quality control of solidification processes [J].

Emadi, D ;

Whiting, LV ;

Nafisi, S ;

Ghomashchi, R .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2005, 81 (01) :235-241

[5]

EMADI D, 2002, AFS T, P503

[6]

Flemings M. C., 1974, SOLIDIFICATION PROCE

[7]

Gowri S., 1994, AFS Transactions, V102, P503

[8]

KIUCHI M, 1996, P 4 INT C SEM PROC A, P278

[9] Deformation behavior of semi-solid A356 Al-Si alloy at low shear rates: Effect of fraction solid [J].

Lashkari, Omid ;

Ghomashchi, Reza .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 486 (1-2) :333-340

[10]

Mackay R., 2000, AFS T, V25, P521

← 1 2 →