The evolution of Al<sub>2</sub>CuMg phase during two-stage homogenisation for 7055 aluminium alloy-Reference-Cited by-同舟云学术

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

Published:2023-07 Issue:10 Volume:39 Page:1187-1198
ISSN:0267-0836
Container-title:Materials Science and Technology
language:en
Short-container-title:Materials Science and Technology

Author:

Ma Dong¹²³,Xu Chunjie¹²³,Guo Can¹²,Wu Xiangquan¹²,Tian Jun³,Zhang Zhongming¹²,Remennik Sergei⁴,Shechtman Dan¹³⁵

Affiliation:

1. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, People's Republic of China

2. 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

3. Xi'an Shechtman Nobel Prize New Materials Institute, Xi’ an University of Technology, Xi'an, People's Republic of China

4. The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, Israel

5. Faculty of Materials Engineering, Technion-Israel Institute of Technology, Haifa, Israel

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.

Funder

National Natural Science Foundation of China

Projects of Major Innovation Platforms for Scientific and Technological and Local Transformation of Scientific and Technological Achievements of Xi'an

Higher Education Institution Discipline Innovation and Intelligence Base of Shaanxi Provincia

Introduction of National High-end Foreign Experts Project

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://journals.sagepub.com/doi/pdf/10.1080/02670836.2022.2163743

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