Constitutive behavior of aluminum alloy in a wide temperature range from warm to semi-solid regions

被引：33

作者：

Chen, Gang ^{[1
]}

Lin, Fengyu ^{[1
]}

Yao, Shengjie ^{[1
]}

Han, Fei ^{[1
]}

Wei, Bin ^{[1
]}

Zhang, Yumin ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Weihai 264209, Peoples R China

[2] Harbin Inst Technol, Sch Astronaut, Harbin 150001, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 674卷

基金：

中国国家自然科学基金;

关键词：

Constitutive behavior; Aluminum alloys; Semi-solid processing; Deformation; Microstructure; HOT DEFORMATION; FLOW-STRESS; STATE;

D O I：

10.1016/j.jallcom.2016.02.254

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：

The constitutive behavior of aluminum alloy 7075 was characterized using compression tests performed over a wide range of temperatures (350-600 degrees C, from warm deformation temperature to semi-solid region) and strain rates (10(-3)-1 s(-1)). This work is of significance for the development of compound forming which combines plastic forming and semi-solid processing. The constitutive behavior in the wide temperature range was divided into two types: plastic deformation when the alloy is in solid state and containing a small fraction of liquid (350-490 degrees C); thixotropic deformation when the alloy is in the semi-solid state (above 490 degrees C). An adjusting factor which denotes the effect of liquid on the constitutive behavior was proposed. The constitutive model of peak stress as a function of temperature and strain rate was obtained for the wide range of temperatures (350-600 degrees C). The average relative errors between the calculated and measured values are 3.88% (350-490 degrees C) and 4.189% (above 490 degrees C), respectively. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：26 / 36

页数：11

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