Modeling for Predicting Flow Stress of Al-14Cu-7Ce Alloy at Elevated Temperature

被引：0

作者：

Wang Zhixiu ^{[1
,2
,3
]}

Li Hai ^{[1
,2
]}

Sun Wangjie ^{[1
,2
]}

Miao Fenfen ^{[1
,2
]}

Song Renguo ^{[1
,2
]}

Zheng Ziqiao ^{[3
]}

机构：

[1] Changzhou Univ, Changzhou 213164, Peoples R China

[2] Key Lab Adv Metall Mat Changzhou City, Changzhou 213164, Peoples R China

[3] Cent S Univ, Changsha 410083, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2014年 / 43卷 / 06期

关键词：

Al-14Cu-7Ce alloy; flow stress; strain compensation; CONSTITUTIVE-EQUATIONS; HOT-DEFORMATION; SIC PARTICLES; RICH CORNER; BEHAVIOR; STEEL; MICROSTRUCTURE; COMPOSITE; WHISKERS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Isothermal hot compression tests of annealed Al-14Cu-7Ce alloy were carried out on Gleeble-3500 system in the temperature range from 573 K to 823 K and the stain rate range from 0.001 s(-1) to 1 s(-1). The resulted true stress-true strain data were employed to establish a constitutive equation for predicting high temperature flow stress. The results show that the flow stress follow well the rate equation (epsilon) over dot = A D(L)Gb/KT [sinh (alpha(L)sigma/G](n). The effect of strain was taken into account by fitting of polynomials into the material parameters A, alpha(L), and n. The proposed constitutive equation can predict precisely high temperature flow stress of Al-14Cu-7Ce alloy. The control mechanism of hot deformation is dislocation climb.

引用

页码：1300 / 1303

页数：4

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