Constitutive analysis to predict high-temperature flow stress in 2099 Al-Li alloy

被引：0
|
作者：
Zhang, Fei [1 ,2 ]
Shen, Jian [1 ]
Yan, Xiaodong [1 ]
Sun, Jianlin [2 ]
机构：
[1] Nonferrous Metals Processing Division, General Research Institute of Non-ferrous Metals, Beijing 100088, China
[2] University of Science and Technology Beijing, Beijing 100083, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2014年 / 43卷 / 06期
关键词：
Constitutive analysis for hot working of 2099 aluminum-lithium (Al-Li) alloy was carried out employing friction and temperature corrected flow curves from isothermal hot compression test; in a wide range of temperatures 300~500°C; at strain rates 0.001~10 s-1 and strains 0.1~0.7. The effects of temperature and strain rate on hot deformation behavior were represented in terms of a hyperbolic sine type Zener-Holloman (Z) parameter equation. The influence of strain was incorporated in the constitutive analysis by considering the effect of strain on material constants. Consequently; a model to predict the high-temperature flow behavior of 2099 Al-Li alloy has been established. The true stress-true strain curves predicted by the developed model are in good agreement with the experiment results throughout the deformation conditions except at 300°C in 10 s-1. Copyright © 2014; Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved;
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页码：1312 / 1318
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