Hot Deformation Behavior and Processing Maps of As-Cast Hypoeutectic Al-Si-Mg Alloy

被引：19
|
作者：
Liang, Zhenglong [1 ]
Zhang, Qi [1 ]
Niu, Liqun [1 ]
Luo, Wei [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2019年 / 28卷 / 08期
基金：
中国国家自然科学基金;
关键词：
dynamic recovery; Hansel-Spittel model; hot deformation behavior; hypoeutectic Al-Si-Mg alloy; processing maps; A356; ALUMINUM-ALLOY; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; FLOW BEHAVIOR; TEMPERATURE; SR;
D O I：
10.1007/s11665-019-04229-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hot deformation behavior of as-cast hypoeutectic Al-Si-Mg alloy has been investigated through hot compression tests at temperatures between 573 and 773 K and the strain rate of 0.001-1 s(-1). A modified Hansel-Spittel constitutive model is proposed, which takes the effect of strain rate on strain hardening into account. The processing maps are established based on the dynamic material model and the Murty criterion. Microstructure observations show that dynamic recovery dominates the dynamic softening behavior, and recrystallized grains are found in the sample tested at 773 K with strain rate of 0.01 and 0.001 s(-1). The size of Si particles decreases by about 64.73% with the effective strain increasing from 0 to 1.2. The optimal hot processing parameters of as-cast hypoeutectic Al-Si-Mg alloy are established based on the processing maps.
引用
收藏
页码：4871 / 4881
页数：11
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