Pressurized solidification of semi-solid aluminum die casting alloy A356

被引：29
|
作者：
Guo, Hong-Min [1 ]
Yang, Xiang-Jie [1 ]
Wang, Jia-Xuan [2 ]
机构：
[1] Nanchang Univ, Sch Mat Sci & Engn, Nanchang 330031, Jiangxi, Peoples R China
[2] Nanchang Aerosp Univ, Sch Mat Sci & Engn, Nanchang 330063, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Metals; Casting; Semi-solid forming; Microstructure; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; MICROSTRUCTURE; MORPHOLOGY;
D O I：
10.1016/j.jallcom.2009.06.083
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pressurized solidification behavior of semi-solid aluminum alloy A356 slurry in relation to the final microstructures and mechanical properties has been investigated. Sound semi-solid slurry has been produced, in which the primary alpha-Al presented in average diameter of 65 mu m and shape factor of 0.84. and featured zero-entrapped eutectic. The structural investigation revealed that application of pressure during solidification of semi-solid Slurry could decrease the grain size, improve the morphology of primary alpha-Al and modify the eutectic silicon due to increasing in the cooling rate. Furthermore, higher applied pressures increased the density and improved tensile properties. Subsequent T6 heat treatment raised the mechanical properties of A356 alloy to average values of tensile strength, 330 MPa, yield strength of 240 MPa and elongation of 13%. (C) 2009 Elsevier B.V. All rights reserved
引用
收藏
页码：812 / 816
页数：5
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