Foundation and application of Al-Zn-Mg-Cu alloy flow stress constitutive equation in friction screw press die forging

被引：14

作者：

Xu, Lei ^{[1
]}

Dai, Guangze ^{[1
]}

Huang, Xingmin ^{[1
]}

Zhao, Junwen ^{[1
]}

Han, Jing ^{[1
]}

Gao, Jiewei ^{[1
]}

机构：

[1] SW Jiaotong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Peoples R China

来源：

MATERIALS & DESIGN | 2013年 / 47卷

关键词：

Aluminum alloy; Flow stress; Constructive equation; Hot forming; HOT DEFORMATION-BEHAVIOR; 7050; ALUMINUM-ALLOY; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURE EVOLUTION; ELEVATED-TEMPERATURES; FEM-SIMULATION; STRAIN;

D O I：

10.1016/j.matdes.2012.12.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Flow stress behavior of extruded Al-5.7Zn-1.9Mg-1.5Cu alloy bar was studied by thermal compression test with temperature and strain rate ranging from 300 degrees C to 450 degrees C and 0.01 s(-1) to 10 s(-1) respectively. It was founded that the characteristic of flow stress during 350-450 degrees C can be described by exponential correlation with activate apparent energy of 152 kJ/mol. With the founded constitutive equation, the die forging processing of a connecting rod in friction screw press was simulated with DEFORM-3D software. The optimum preheat temperature of die forging process are 425 degrees C for billet, and 200 degrees C for container. The simulation of the hot forming process shows good agreement with experiments results of geometry and streamline of the workpiece. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：465 / 472

页数：8

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