The influence of modification of the geometry of the front surface of the RFSSW tool inner sleeve on the fatigue life of joints during joining clad sheets made of aluminum alloy 2024-T3

IF 4.4 3区工程技术 Q1 ENGINEERING, CIVIL Archives of Civil and Mechanical Engineering Pub Date : 2024-11-05 DOI:10.1007/s43452-024-00963-0

Waldemar Łogin, Romana Ewa Śliwa, Waldemar Ziaja, Robert Ostrowski

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Abstract

Refill Friction Stir Spot Welding (RFSSW) has a number of advantages that make it a possible alternative to riveting and resistance welding in aerospace structures, the automotive industry and other applications. Adequate determination of technological parameters which ensure the desired properties of welds and their functioning in various operating conditions requires, among others, appropriate fatigue life of connections. The article presents the results of comparative tests of the mechanical properties of welds (load-bearing capacity and fatigue life at selected three load levels) made with a basic tool (G0) and a tool with a modified geometry (G4). The samples were made of 1.27 mm thick clad sheets of 2024-T3 aluminum alloy with an additional oxide anodic coating. It has been shown that the modified geometry of the working surface of the inner sleeve of the RFSSW tool improves the conditions and course of the plasticization and stirring process of the joined materials. The use of a G4 geometry tool allowed for approximately 30% higher joint load-bearing capacity and approximately twice as long fatigue life (at lower load levels) compared to welds made with the G0 tool.

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改变射频超声波焊接工具内套筒前表面的几何形状对连接铝合金 2024-T3 复合板时接头疲劳寿命的影响

填充式搅拌摩擦点焊（RFSSW）具有许多优点，因此在航空航天结构、汽车工业和其他应用中，可以替代铆接和电阻焊接。要充分确定技术参数，以确保焊缝的理想特性及其在各种工作条件下的功能，除其他外，还需要适当的连接疲劳寿命。文章介绍了使用基本工具（G0）和改进几何形状工具（G4）对焊缝的机械性能（在选定的三个载荷水平下的承载能力和疲劳寿命）进行比较试验的结果。样品由厚度为 1.27 毫米的 2024-T3 铝合金复合板制成，复合板上有一层额外的氧化阳极涂层。结果表明，射频无缝钢管工具内套筒工作面的改进几何形状改善了接合材料塑化和搅拌过程的条件和进程。与使用 G0 工具焊接的焊缝相比，使用 G4 几何形状工具焊接的焊缝承载能力提高了约 30%，疲劳寿命延长了约两倍（载荷水平较低）。

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来源期刊

Archives of Civil and Mechanical Engineering 工程技术-材料科学：综合

CiteScore

6.80

自引率

9.10%

发文量

201

审稿时长

4 months

期刊介绍： Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science. The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics. The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation. In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.