Microstructure and mechanical properties of 7075 aluminum alloy parts formed by semi-solid thixoextrusion

被引：8

作者：

Xiao, Guan-fei ^{[1
]}

Jiang, Ju-fu ^{[2
]}

Wang, Ying ^{[3
]}

Liu, Ying-ze ^{[2
]}

Zhang, Ying ^{[2
]}

Guo, Bao-yong ^{[3
]}

He, Zhen ^{[1
]}

Xian, Xi-rui ^{[1
]}

机构：

[1] Nucl Power Inst China, Sci & Technol Reactor Syst Design Technol Lab, Chengdu 610213, Peoples R China

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[3] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2023年 / 33卷 / 11期

基金：

中国国家自然科学基金;

关键词：

7075 aluminum alloy; semi-solid thixoforming; heat treatment; microstructure; mechanical properties; BEHAVIOR; EVOLUTION; PRECIPITATION; EXTRUSION; TEXTURE;

D O I：

10.1016/S1003-6326(23)66330-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Hot-extruded 7075 aluminum alloy was used to form deep cavity cylinders by thixoextrusion. The effects of isothermal temperature and soaking time on the microstructure and mechanical properties of the formed parts were analyzed. The parameters of T6 heat treatment were optimized by orthogonal test, and the influence of T6 heat treatment on the microstructure and mechanical properties of the formed parts was studied. The results indicated that the deep cavity cylinder with a smooth surface could be successfully formed through thixoextrusion. The forming temperature and heating time had remarkable effects on the metallographic structure of the formed components. T6 heat treatment could greatly enhance the mechanical properties of the deep cavity cylinders. The optimum parameters of T6 heat treatment were achieved as: solution at 465 degrees C for 16 h and aging at 150 degrees C for 16 h. When semi-solid billets were heated at 600 degrees C for 10 min, the formed deep cavity cylinder had the best mechanical properties with the ultimate tensile strength of 573.57 MPa, the elongation of 13.44%, and the microhardness of HV 187.12.

引用

页码：3235 / 3249

页数：15

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