Study about heat treatment on microstructure, electrical conductivity and mechanical properties of Al-1Si-0.6Mg-0.2Fe alloy

被引：0

作者：

Liu, Houyun ^{[1
]}

Liu, Jie ^{[1
]}

Wang, Yan ^{[1
]}

Liu, Shiying ^{[2
]}

Wang, Jun ^{[2
]}

Wang, Yongxiao ^{[1
]}

Li, Xinghui ^{[1
]}

Li, Hui ^{[1
]}

Cui, Hongwei ^{[1
]}

Pan, Yaokun ^{[1
]}

Feng, Rui ^{[1
]}

Cui, Xiaoli ^{[1
,3
]}

机构：

[1] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255000, Shandong, Peoples R China

[2] Binzhou Bohai Piston Co Ltd, Binzhou 256600, Shandong, Peoples R China

[3] 266 Xincun West Rd, Zibo, Shandong, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2024年 / 209卷

关键词：

Conductive material; Heat treatment; Electrical conductivity; Mechanical properties; Microstructure; MG-SI ALLOY; ENHANCED STRENGTH; GRAIN-SIZE; ALUMINUM; DEFORMATION; EVOLUTION; TEXTURE; STRESS; MICRO; FE;

D O I：

10.1016/j.matchar.2024.113700

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the electrical conductivity (EC) and mechanical properties of extruded state Al-1Si-0.6Mg-0.2Fe alloy (ES-Alloy) are enhanced through T6 heat treatment, and the underlying mechanisms are analyzed in conjunction with model calculations. Results demonstrate that the optimal heat treatment process for the ESAlloy is 550 degree celsius / 2 h + 230 degree celsius / 16 h. Through the heat treatment process, the alloy's EC and ultimate tensile strength are 57.0% IACS and 247.6 MPa, respectively, which are improved by 4.6% and 54.8%, respectively. For ES-Alloy, after heat treatment, owing to reversion and recrystallization, the average grain size of the alloy is 175.9 mu m and becomes 6.93 times larger. Combined with theoretical calculation, the contribution of grain boundary strengthening to the alloy's strength is only reduced by 9.1 MPa. However, the reduction of grain boundary area reduces the scattering of free electrons during the transport process, which is beneficial to improving EC. Moreover, by modifying the heat treatment parameters, nanoscale Mg2Si and large-size AlFeSi second phases present in the alloy keep a favorable lattice match with the Al matrix, proving that this makes the main contribution to the alloy's strength. The microstructures give consideration for both the high efficiency of electron transport and the enhancement of mechanical properties. So, it is advantageous for the improvement of EC and mechanical properties.

引用

页数：9

共 36 条

[1] Atomic scale investigation of the crystal structure and interfaces of the B′ precipitate in Al-Mg-Si alloys [J].

Chen, Haonan ;

Lu, Jiangbo ;

Kong, Yi ;

Li, Kai ;

Yang, Tong ;

Meingast, Arno ;

Yang, Mingjun ;

Lu, Qiang ;

Du, Yong .

ACTA MATERIALIA, 2020, 185 :193-203

[2] Effect of dislocation characteristics on electrical conductivity and mechanical properties of AA 6201 wires [J].

Cho, Chang-Hee ;

Cho, Hoon .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2021, 809

[3] Study on microstructure characterization, electrical conductivity and mechanical property improvement mechanisms of a novel Al-Si-Mg-Fe-Cu alloy [J].

Cui, X. L. ;

Li, X. H. ;

Ye, H. ;

Cui, H. W. ;

Li, H. ;

Pan, Y. K. ;

Feng, R. ;

Wu, Y. Y. ;

Liu, X. F. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 885

[4] The improvement mechanism of good matching between electrical conductivity and mechanical properties for Al-4Si-0.8Mg-0.6Fe alloy [J].

Cui, Xiaoli ;

Ye, Hui ;

Liu, Houyun ;

Li, Xinghui ;

Man, Qianming ;

Li, Hui ;

Cui, Hongwei ;

Feng, Rui ;

Pan, Yaokun .

JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 938

[5] On the origin of deformation mechanisms in a heterostructured aluminum alloy via slip trace and lattice rotation analyses [J].

Dash, S. S. ;

Li, D. J. ;

Zeng, X. Q. ;

Li, D. Y. ;

Chen, D. L. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 867

[6] Experimental measurement of dislocation density in metallic materials: A quantitative comparison between measurements techniques (XRD, R-ECCI, HR-EBSD, TEM) [J].

Gallet, J. ;

Perez, M. ;

Guillou, R. ;

Ernould, C. ;

Le Bourlot, C. ;

Langlois, C. ;

Beausir, B. ;

Bouzy, E. ;

Chaise, T. ;

Cazottes, S. .

MATERIALS CHARACTERIZATION, 2023, 199

[7] EFFECT OF GRAIN-SIZE AND STRAIN ON TENSILE FLOW-STRESS OF ALUMINUM AT ROOM-TEMPERATURE [J].

HANSEN, N .

ACTA METALLURGICA, 1977, 25 (08) :863-869

[8] Nano-scale precipitates: The key to high strength and high conductivity in Al alloy wire [J].

Hou, J. P. ;

Wang, Q. ;

Zhang, Z. J. ;

Tian, Y. Z. ;

Wu, X. M. ;

Yang, H. J. ;

Li, X. W. ;

Zhang, Z. F. .

MATERIALS & DESIGN, 2017, 132 :148-157

[9] Mechanisms behind the macro- and microscopic behaviors of the electric heated Al-Mg-Si alloy wires [J].

Hou, Jiapeng ;

Chen, Ling ;

Wang, Qiang ;

Zhang, Yi ;

Zhou, Xianghai ;

Hong, Jing ;

Zhang, Zhenjun ;

Yuan, Qulong ;

Zhang, Zhefeng .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2022, 849

[10] Grain size-dependent Mg/Si ratio effect on the microstructure and mechanical/electrical properties of Al-Mg-Si-Sc alloys [J].

Jiang, Shengyu ;

Wang, Ruihong .

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2019, 35 (07) :1354-1363

← 1 2 3 4 →