Exit-hole repairing in 7475 aluminium alloy welded joints based on refill friction stir processing

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science and Technology of Welding and Joining Pub Date : 2023-07-23 DOI:10.1080/13621718.2023.2235791

T. Yuan, Shaoqian Kang, Xiaoqing Jiang, P. Zhao

引用次数: 1

Abstract

In this study, the refill friction stir processing (RFSP) method was utilised to repair a exit-hole defect located at the end of the friction stir welding (FSW) joints in 7475 aluminium alloy plate. The morphology, macroscopic defects, and mechanical properties of the repaired joints were investigated. The results demonstrate that the exit-hole was successfully refilled after RFSP. Material flow caused the refill voids, annular grooves, and un-stirred material defects. The maximum strength reached 415 Mpa, equal to 105% of the base defect-free weld. The mechanical properties of repaired joint were largely influenced by the stir zone (SZ) boundary and un-stirred material defects.

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基于再填充搅拌摩擦工艺的7475铝合金焊接接头出口孔修复

本研究采用再填充搅拌摩擦处理(RFSP)方法修复7475铝合金板搅拌摩擦焊接(FSW)接头末端的出口孔缺陷。对修复后接头的形貌、宏观缺陷和力学性能进行了研究。结果表明，RFSP后出口孔洞充填成功。物料流动造成了补料空洞、环形槽和未搅拌的物料缺陷。最大强度达到415 Mpa，相当于基材无缺陷焊缝的105%。修复接头的力学性能受搅拌区边界和未搅拌材料缺陷的影响较大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science and Technology of Welding and Joining 工程技术-材料科学：综合

CiteScore

6.10

自引率

12.10%

发文量

审稿时长

1.7 months

期刊介绍： Science and Technology of Welding and Joining is an international peer-reviewed journal covering both the basic science and applied technology of welding and joining. Its comprehensive scope encompasses all welding and joining techniques (brazing, soldering, mechanical joining, etc.) and aspects such as characterisation of heat sources, mathematical modelling of transport phenomena, weld pool solidification, phase transformations in weldments, microstructure-property relationships, welding processes, weld sensing, control and automation, neural network applications, and joining of advanced materials, including plastics and composites.