Effects of pulsed magnetic field on microstructures and morphology of the primary phase in semisolid A356 Al slurry

被引：34

作者：

Zhang, L. ^{[2
]}

Li, W. ^{[1
]}

Yao, J. P. ^{[2
]}

Qiu, H. ^{[2
]}

机构：

[1] Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Peoples R China

[2] Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, Nanchang 330063, Peoples R China

来源：

MATERIALS LETTERS | 2012年 / 66卷 / 01期

关键词：

Pulsed magnetic field; Semisolid slurry; Solidification microstructure; Refinement; FORCED ELECTROMAGNETIC VIBRATIONS; ALUMINUM-ALLOYS; REFINEMENT; SOLIDIFICATION; FREQUENCY; BILLETS; MELT;

D O I：

10.1016/j.matlet.2011.08.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel technique for introducing pulsed magnetic field (PMF) during isothermal holding period of A356 Al alloy has been employed to prepare semisolid slurry. The effects of vibration frequency of PMF on morphology of the primary phase in semisolid A356 Al alloy slurry were studied, and some characteristic parameters characterized the morphology and grain size of the primary phase were obtained. The results show that the primary alpha-Al particles become smaller and rounder with the increase of vibration frequency. The slurry with primary alpha-Al particle average diameter of about 79 pm and average shape factor of about 0.58 can be prepared under the action of a PMF at 10 Hz and 600 degrees C for 4 min. It is feasible to use PMF processing to prepare semisolid alloy slurry, because of its strong forced convection within the whole bulk melt. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：190 / 192

页数：3

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