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时效硬化铝合金焊接接头软化行为改善技术综述

Review of Techniques for Improvement of Softening Behavior of Age-Hardening Aluminum Alloy Welded Joints.

作者信息

Cheng Jiwen, Song Gang, Zhang Xiaosheng, Liu Chunbai, Liu Liming

机构信息

Key Laboratory of Liaoning Advanced Welding and Joining Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China.

China FAW Group Co., Ltd, Manufacturing Engineering & Logistics Department, Changchun 130011, China.

出版信息

Materials (Basel). 2021 Oct 4;14(19):5804. doi: 10.3390/ma14195804.

DOI:10.3390/ma14195804
PMID:34640203
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8510448/
Abstract

The softening phenomenon of age-hardening aluminum alloy-welded joints is severe during conventional fusion welding, which increases the likelihood of stress and strain concentration in the joint during the period of service, significantly reduces the mechanical properties compared to the base metal, and represents an obstacle to the exploration of the potential structural performance. This review paper focuses on an overview of the softening phenomenon. Firstly, the welding softening mechanism and the characteristics of age-hardening aluminum alloys are clarified. Secondly, the current main research methods that can effectively improve joint softening are summarized into three categories: low-heat-input welding, externally assisted cooling during welding, and post-weld treatment. The strengthening mechanism and performance change rule of age-hardening aluminum alloy joints are systematically analyzed. Finally, this paper considers the future development trends of further research on joint softening, and it is expected that interest in this topic will increase.

摘要

时效硬化铝合金焊接接头在传统熔焊过程中的软化现象严重，这增加了服役期间接头处应力和应变集中的可能性，与母材相比显著降低了力学性能，并且成为探索潜在结构性能的障碍。这篇综述论文聚焦于软化现象的概述。首先，阐明了焊接软化机制及时效硬化铝合金的特性。其次，将目前能够有效改善接头软化的主要研究方法归纳为三类：低热输入焊接、焊接过程中的外部辅助冷却以及焊后处理。系统分析了时效硬化铝合金接头的强化机制及性能变化规律。最后，本文探讨了接头软化进一步研究的未来发展趋势，预计对此主题的关注度将会提高。

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本文引用的文献

1
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Materials (Basel). 2018 Dec 26;12(1):79. doi: 10.3390/ma12010079.
2
Multi-Objective Optimization of Friction Stir Welding Process Parameters of AA6061-T6 and AA7075-T6 Using a Biogeography Based Optimization Algorithm.基于生物地理学优化算法的AA6061-T6和AA7075-T6搅拌摩擦焊工艺参数多目标优化
Materials (Basel). 2017 May 15;10(5):533. doi: 10.3390/ma10050533.