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Materials Science and Technology Volume 39, 2023 - Issue 10
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Research Article

The evolution of Al2CuMg phase during two-stage homogenisation for 7055 aluminium alloy

Dong Maa School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, People’s Republic of China;b Xi’an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming, Xi’an University of Technology, Xi’an, People’s Republic of China;c Xi’an Shechtman Nobel Prize New Materials Institute, Xi’ an University of Technology, Xi’an, People’s Republic of ChinaView further author information
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Chunjie Xua School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, People’s Republic of China;b Xi’an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming, Xi’an University of Technology, Xi’an, People’s Republic of China;c Xi’an Shechtman Nobel Prize New Materials Institute, Xi’ an University of Technology, Xi’an, People’s Republic of ChinaCorrespondence[email protected]
View further author information
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Can Guoa School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, People’s Republic of China;b Xi’an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming, Xi’an University of Technology, Xi’an, People’s Republic of ChinaView further author information
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Xiangquan Wua School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, People’s Republic of China;b Xi’an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming, Xi’an University of Technology, Xi’an, People’s Republic of ChinaView further author information
,
Jun Tianc Xi’an Shechtman Nobel Prize New Materials Institute, Xi’ an University of Technology, Xi’an, People’s Republic of ChinaView further author information
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Zhongming Zhanga School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, People’s Republic of China;b Xi’an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming, Xi’an University of Technology, Xi’an, People’s Republic of ChinaView further author information
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Sergei Remennikd The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, IsraelView further author information
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Dan Shechtmana School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, People’s Republic of China;c Xi’an Shechtman Nobel Prize New Materials Institute, Xi’ an University of Technology, Xi’an, People’s Republic of China;e Faculty of Materials Engineering, Technion-Israel Institute of Technology, Haifa, IsraelView further author information
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Pages 1187-1198 | Received 20 Sep 2022, Accepted 26 Dec 2022, Published online: 05 Jan 2023
 
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Abstract

In this paper, the effect of two-stage homogenisation treatment on the evolution of the second phase was investigated. The microstructure of the extruded 7055 aluminium alloy was composed of α(Al) matrix and other second phases, including MgZn2, Al2CuMg, and Al7Cu2Fe phases. The segregation of second phase was serious and the content was 27.9%. During the 460°C × 24 h homogenisation, MgZn2 phases dissolved quickly, but there was still a significant amount of Al2CuMg phases present. After two-stage homogenisation (460°C × 24 h + 480°C × 10 h), the content of Al2CuMg phase decreased from 15% to 3% and the degree of segregation was reduced. In addition, the mechanical properties of the extruded 7055 alloy were effectively improved.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by International Science and Technology Cooperation Program of Shaanxi Province(No. 2023-GHZD-50), Higher Education Institution Discipline Innovation and Intelligence Base of Shaanxi Provincial (No. S2021-ZC-GXYZ-0011), Projects of Major Innovation Platforms for Scientific and Technological and Local Transformation of Scientific and Technological Achievements of Xi'an (No. 20GXSF0003), Introduction of National High-end Foreign Experts Project (G2021041003L) and National Natural Science Foundation of China (Grants No. 51801154).

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