Study of Fractography and Overaging in Ly12 Alloy

被引：0
|
作者：
Khan, W. Q. [1 ]
Wang, Q. [1 ]
Jin, X. [1 ]
机构：
[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
来源：
PROCEEDINGS OF THE 2015 INTERNATIONAL CONFERENCE ON STRUCTURAL, MECHANICAL AND MATERIAL ENGINEERING (ICSMME 2015) | 2016年 / 19卷
关键词：
Aging; GP zones; Solution treatment; Eutectic; Grain boundary;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This work is aimed to optimize the heat treatment parameters of Ly12 (Al -Cu -Mg) alloy for improvement in properties. Also to study the aging behavior for determination of peak strength and highlighting the limitations of over -aging (over -burning). Normal composition of the alloy is 4.0 Cu, 0.7 Mn, 0.8 Mg, 0.5 Si and balance Al. Thermal treatment process to achieve the ultimate properties is solution treatment at 500 C followed by quenching in cold water and then natural aging at room temperature for 96 hours. Main phases in this alloy are Mg2Si & CuAl2. If the heating temperature goes beyond 500 C, the over -aging of Mg2Si phase occurs. Over -aging is grouped into three categories a) slightly over -ageing b) medium over -ageing and c) serious over -ageing. In the present work samples of Al alloy were heat treated at different temperatures and then the effect of over burning on microstructure and mechanical properties was studied.
引用
收藏
页码：94 / 97
页数：4
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