Microstructural features of as-cast A356 alloy inoculated with Sr, Sb modifiers and Al-Ti-C grain refiner simultaneously

被引：33

作者：

Rao, A. K. Prasada ^{[1
]}

Das, K. ^{[2
]}

Murty, B. S. ^{[3
]}

Chakraborty, M. ^{[2
]}

机构：

[1] Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Pohang 790784, South Korea

[2] Indian Inst Technol Kharagpur, Dept Met & Mat Engn, Kharagpur, W Bengal, India

[3] Indian Inst Technol Madras, Dept Met & Mat Engn, Madras, Tamil Nadu, India

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 02期

关键词：

Al-Si alloy; modification; microstructure; solidification; grain refinement;

D O I：

10.1016/j.matlet.2007.05.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article focuses on the microstructural refinement of as-cast A356 alloy, obtained by melt inoculation of the same. The inoculants used are Sr (modifier), Sb (modifier) and Al-Ti-C (grain refiner). Microstructural characterization of A356 alloy reveals that the Secondary Dendritic Arm Spacing (SDAS) of alpha-Al dendrites and size/morphology of eutectic silicon decrease by treating the melt with pre-defined amounts of Sr, Sb and Al-5Ti-2C grain refiner. Microstructure of the inoculated as-cast A356 alloy shows that, modified eutectic-sil icon exhibits fine fibrous morphology at shorter melt holding, while the same exhibits fine lamellar morphology on longer melt holding. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：273 / 275

页数：3

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