Impact toughness in Al-12Si and Al-12Si-3Cu cast alloys - Part 1: Effect of process variables and microstructure

被引：29
|
作者：
Basavakumar, K. G. [1 ]
Mukunda, P. G. [1 ]
Chakraborty, M. [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
来源：
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2008年 / 35卷 / 04期
关键词：
impact toughness; grain refinement : modification; eutectic Al-Si cast alloys;
D O I：
10.1016/j.ijimpeng.2007.03.002
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The charpy impact energy of Al-12Si and Al-12Si-3Cu cast alloys was measured in terms of the total absorbed energy. The standard charpy specimens 10 x 10 x 55 turn with a 2 turn V-notch were prepared from the castings. Effect of process variables and microstructural changes on the impact toughness of Al-12Si and Al-12Si-3Cu cast alloys was investigated. The results indicate that combined grain refined and modified Al-12Si-3Cu cast alloys have microstructures consisting of uniformly distributed alpha-Al dendrites, eutectic Al-Si and fine CuAl2 particles in the interdendritic region. These alloys exhibited better impact toughness in the cast condition compared with the same alloy subjected to only grain refinement or modification. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：199 / 205
页数：7
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