Effect of online quenching on microstructure and mechanical properties of 7A62 aluminum alloy

被引：0

作者：

Yue X.-M. ^{[1
]}

Liu W.-H. ^{[1
,2
]}

Song Y.-F. ^{[1
]}

Hu Q. ^{[1
]}

Huang H. ^{[3
]}

Li H. ^{[1
]}

机构：

[1] School of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan

[2] School of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen

[3] Jianglu Machinery Electronics Group Co., Ltd., Xiangtan

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 11期

基金：

中国国家自然科学基金;

关键词：

7A62 aluminum alloy; mechanical property; microstructure; online quenching;

D O I：

10.11817/j.ysxb.1004.0609.2023-44138

中图分类号：

学科分类号：

摘要：

The effects of the online quenching on the microstructures and mechanical properties of the 7A62 aluminum alloy were studied by means of EBSD, SEM, TEM observations together with hardness and dynamic impact performance tests, and the conventional offline quenching process was compared. The results show that the retained high density of dislocations before aging treatment can compensate for the contribution of the supersaturated solid solution to the strength of the short-process flow online quenched alloy, so that it can achieve the same mechanical properties as the conventional offline quenched alloy. Compared with the offline quenched 7A62 aluminum alloy, the recrystallization and grain growth behavior in the online quenched alloy are inhibited, and the high-density dislocations generated by plastic deformation are also retained, which accelerates the precipitation nucleation process, thus leading to the size of η′phase decreases by 9.5%. After aging treatment, the online quenched 7A62 alloy obtains the comparable dynamic impact performance as the offline quenched alloy, and the peak flow stress and energy absorption value reach 681.6 MPa and 147.6 MJ/m3, respectively. © 2023 Central South University of Technology. All rights reserved.

引用

页码：3595 / 3605

页数：10

共 30 条

[1]

LANG Yu-jing, ZHOU Gu-xin, WANG Sheng, Et al., Composition design and trans-scale precipitates strengthening of high-strength weldable 7A62 Al-alloy, The Chinese Journal of Nonferrous Metals, 30, 1, (2020)

[2]

ZHOU Gu-xin, LANG Yu-jing, DU Xiu-zheng, Et al., Dynamic mechanical response and J-C constitutive equation of high strength 7A62 aluminum alloy, The Chinese Journal of Nonferrous Metals, 31, 1, (2021)

[3]

CHANG Li-jun, YUAN Sheng-lin, HUANG Xing-yuan, Et al., Determination of Johnson-Cook damage model for 7xxx laminated aluminum alloy and simulation application, Materials Today Communications, 34, (2023)

[4]

GENG Hui-cheng, WANG Yi-lin, ZHU Bin, Et al., Effect of solution treatment time on plasticity and ductile fracture of 7075 aluminum alloy sheet in hot stamping process[J], Transactions of Nonferrous Metals Society of China, 32, 11, (2022)

[5]

DURSUN T, SOUTIS C., Recent developments in advanced aircraft aluminium alloys[J], Materials & Design, 56, (2014)

[6]

ZHU Guo-chuan, XIONG Bai-qing, TONG You-zhi, Et al., Effect of solution treatment on mechanical properties and fracture behavior of 7B52 aluminum alloy plate, The Chinese Journal of Nonferrous Metals, 27, 5, (2017)

[7]

LIU Jiao-jiao, WU Yue, LAI Yong-qiu, Et al., Effects of solution temperature on microstructures and properties of 7B50 aluminum alloy, The Chinese Journal of Nonferrous Metals, 23, 11, (2013)

[8]

ZHANG Cun-sheng, ZHANG Zhao-gang, LIU Ming-fu, Et al., Effects of single-and multi-stage solid solution treatments on microstructure and properties of as-extruded AA7055 helical profile[J], Transactions of Nonferrous Metals Society of China, 31, 7, (2021)

[9]

ZHANG Yong, DENG Yun-lai, ZHANG Xin-ming, Et al., Quenching sensitivity of 7050 aluminium alloy hot-rolled plate, The Chinese Journal of Nonferrous Metals, 18, 10, (2008)

[10]

JIANG Fu-qing, HUANG Ji-wu, JIANG Ying-ge, Et al., Effects of quenching rate and over-aging on microstructures, mechanical properties and corrosion resistance of an Al-Zn-Mg (7046A) alloy, Journal of Alloys and Compounds, 854, (2021)

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