X-ray Image Characteristics of 2219 Aluminum Alloy Friction Stir Welding Seams and Their Causes

QIU Yiqing; YAO Xuwei; BU Xing; ZHAO Duo; ZHANG Zili; LU Wei; NI Linbin

doi:10.7512/j.issn.1001-2303.2023.06.17

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X-ray Image Characteristics of 2219 Aluminum Alloy Friction Stir Welding Seams and Their Causes
Vol. 53, Issue 6, Pages: 117-121(2023)
DOI： 10.7512/j.issn.1001-2303.2023.06.17

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仇一卿，姚徐伟，卜星，等.2219铝合金搅拌摩擦焊焊缝X射线影像特征及其形成原因［J］.电焊机，2023，53（6）：117-121.

QIU Yiqing, YAO Xuwei, BU Xing, et al.X-ray Image Characteristics of 2219 Aluminum Alloy Friction Stir Welding Seams and Their Causes[J].Electric Welding Machine, 2023, 53(6): 117-121.
仇一卿，姚徐伟，卜星，等.2219铝合金搅拌摩擦焊焊缝X射线影像特征及其形成原因［J］.电焊机，2023，53（6）：117-121. DOI： 10.7512/j.issn.1001-2303.2023.06.17.

QIU Yiqing, YAO Xuwei, BU Xing, et al.X-ray Image Characteristics of 2219 Aluminum Alloy Friction Stir Welding Seams and Their Causes[J].Electric Welding Machine, 2023, 53(6): 117-121. DOI： 10.7512/j.issn.1001-2303.2023.06.17.

摘要

对6 mm厚2219铝合金进行了搅拌摩擦焊接，并利用X射线对焊缝进行检测，同时截取了焊缝横向及纵向金相试样进行对照分析，观察焊缝发现：位于焊缝前进侧区域存在一条明显亮线，焊缝纵向存在呈周期性断续分布的白色月牙状夹杂。分析认为，受搅拌摩擦焊热-力作用以及材料塑性流动的综合影响，在前进侧形成强化相的异常聚集与长大，同时受原材料强化相尺寸及分布特征影响，形成不均匀的月牙形夹杂，但夹杂厚度较小，且与基体形成冶金结合，聚集相对焊缝力学性能无显著影响。

Abstract

In this paper, 6 mm-thick 2219 aluminium alloy were welded by friction stir welding. The results of both the X ray image and the metallographic structure observed at transverse and longitudinal direction were compared and analyzed. A obvious bright line could be observed at the advanced side in the joint and crescent shaped white inclusions could be observed along the weld longitudinal direction with periodic intermittent distribution. It was the combined influence of both thermal mechanical effect and plastic material flow during FSW that cause the abnormal aggregation and growth of strengthening phase at the advanced side in the joint. Under the influence of the size and the distribution characteristics of the strengthening phase of the material, it formed an uneven crescent-shaped inclusion.But the inclusion thickness is thin and formed a metallurgical bond with the matrix. The aggregated phase has no significant effect on the joint mechanical properties.

关键词

2219铝合金搅拌摩擦焊X射线强化相

Keywords

2219 aluminum alloyfriction stir weldingX rayaggregated phase

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