Study on Hot Deformation Behavior of Al-xMg-2.8Zn Alloy by Constitutive Equations and Processing Maps

doi:10.12442/j.issn.1002-185X.20210288

Home > Archive>Volume 51, Issue 6, 2022 >2046-2055. DOI:10.12442/j.issn.1002-185X.20210288

Study on Hot Deformation Behavior of Al-xMg-2.8Zn Alloy by Constitutive Equations and Processing Maps
DOI:
                        10.12442/j.issn.1002-185X.20210288
                    
Author:
                        Yao Jingjing1Yao Jingjing
State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
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Zhang Di1,2Zhang Di
State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing 100083, China
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Zhang Jishan1,2Zhang Jishan
State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing 100083, China
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Affiliation:1.State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;2.Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing 100083, China
Clc Number:
Fund Project:Major State Research and Development Program of China (2016YFB0300801); National Natural Science Foundation of China (51971019, 51571013)

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Abstract:

The hot deformation behavior of Al-xMg-2.8Zn alloys at deformation temperature of 300~490 °C, strain rate of 0.001~5 s^-1 was studied by isothermal hot compression tests. After correcting the flow softening from deformation heating in stress-strain curves, Arrhenius-type constitutive equations and processing maps were used to predict and analyze the hot deformation behavior of Al-xMg-2.8Zn alloys. The results show that the flow stress increases with increasing Mg content and strain rate or decreasing temperature. According to the processing maps and corresponding microstructure of alloys, the range of optimum hot deformation parameters of alloys is determined. The range of hot deformation temperature and strain rate both extend and the instability domains extend to the zone of higher temperature and lower strain rate with increasing the Mg content.

Key words:Al-Mg-Zn alloy;hot deformation behavior;constitutive equation;processing map

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Get Citation

[Yao Jingjing, Zhang Di, Zhang Jishan. Study on Hot Deformation Behavior of Al-xMg-2.8Zn Alloy by Constitutive Equations and Processing Maps[J]. Rare Metal Materials and Engineering,2022,51(6):2046~2055.]
DOI：10.12442/j. issn.1002-185X.20210288

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Received:April 02,2021
Revised:November 01,2021
Adopted:January 22,2022
Online: June 29,2022
Published: June 29,2022

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