Thermal deformation behavior and microstructural evolution of the rapidly-solidified Al-Zn-Mg-Cu alloy in hot isostatic pressing state

被引：7

作者：

Zhang, Zhen ^{[1
]}

Cong, Hailong ^{[1
]}

Yin, Zijuan ^{[1
]}

Qi, Bo ^{[1
]}

Dong, Yi ^{[2
]}

Kong, Lingjun ^{[2
]}

Li, Haichao ^{[1
,2
]}

Prashanth, Konda Gokuldoss ^{[3
,4
]}

机构：

[1] Shanghai Univ Engn Sci, Sch Mat Sci & Engn, Shanghai 201620, Peoples R China

[2] Jiangsu Pacific Precis Forging Co Ltd, Taizhou 225599, Peoples R China

[3] Tallinn Univ Technol, Dept Mech & Ind Engn, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

[4] Vellore Inst Technol, Sch Mech Engn, CBCMT, Vellore 630014, Tamil Nadu, India

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 30卷

基金：

中国国家自然科学基金;

关键词：

Al-Zn-Mg-Cu alloy; Hot isostatic pressing; Constitutive model; Processing map; Microstructure evolution; DYNAMIC RECRYSTALLIZATION; ALUMINUM-ALLOY; ISOTHERMAL COMPRESSION; CONSTITUTIVE EQUATION; FRICTION; EXTRUSION; MECHANISM; METAL; COLD; EBSD;

D O I：

10.1016/j.jmrt.2024.04.235

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Isothermal uniaxial compression experiments were performed in the temperature range of 340-460 degrees C and the deformation rate range of 0.001-1 s(-1) to analyze the hot deformation behavior of the rapidly-solidified Al-Zn-Mg-Cu alloy in hot isostatic pressing state. A strain-compensated constitutive model was established to determine the flow stress in the alloy (based on the true stress-true strain data), and the average activation energy for the hot deformation was calculated as Q = similar to 146 kJ/mol. The proposed model exhibited a high predictability with an average absolute relative error of 2.68% and a correlation coefficient of 0.99724. The processing map revealed that the alloy in the hot isostatic pressed state offers better workability than the spray-deposited alloy, and its optimal workable ranges at a strain of 0.78 are 370-390 degrees C/0.004-0.01 s(-1) and 400-460 degrees C/0.005-0.06 s(-1), respectively. The microstructural evolution shows that the main dynamic softening mechanism changes from dynamic recovery to continuous dynamic recrystallization with the increase in temperature and the decrease in strain rate.

引用

页码：5927 / 5939

页数：13

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