Effects of polymer sealant interlayer on quality of EN AW-2024-T3 aluminum alloy lap joint prepared by friction stir welding

IF 4.4 3区工程技术 Q1 ENGINEERING, CIVIL

Archives of Civil and Mechanical Engineering Pub Date : 2024-09-24 DOI:10.1007/s43452-024-01047-9

Andrzej Kubit, Hamed Aghajani Derazkola, Piotr Myśliwiec, Paulina Szawara, Ján Slota, Wojciech Macek

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Abstract

This study investigates the influence of polymer interlayers on the mechanical properties and fracture behavior of friction stir welded EN AW-2024-T3 aluminum alloy joints. Aqualock AL 6002 (Adhesive_1) and 3M Adhesion Promoter 86A (Adhesive_2) were selected as polymeric sealants for EN AW-2024-T3 aluminum alloy interfaces. Force analysis revealed that the choice of polymer interlayer significantly affects the axial force during welding, with Adhesive_1 joints showing a significant reduction in force compared to other variants. The axial force during FSW in Adhesive_1 was 18% less than in Adhesive_2. Cross-sectional analysis revealed distinct features in joint morphology and defects, with Adhesive_1 joints exhibiting favorable thermal stability and minimal defects compared to Adhesive_2 joints. Tensile strength analysis showed a significant increase in load capacity for the Adhesive_1 (9470N) joint, while the Adhesive_2 (5030N) joint exhibited reduced strength due to inadequate heat flow. The Adhesive_1 joint showed a 93% increase in tensile strength compared to Adhesive_2. The mixing of Adhesive_2 with the joint area produced hard complex particles that reduced the strength of the final joint. Fracture analysis revealed complex fracture mechanisms, with Adhesive_1 joints exhibiting ductile fracture zones and Adhesive_2 joints exhibiting quasi-cleavable intergranular cracking. Microhardness distribution analysis showed variation between the joint variants, with Adhesive_2 joints showing higher microhardness in the weld nugget.

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聚合物密封剂夹层对搅拌摩擦焊制备的 EN AW-2024-T3 铝合金搭接接头质量的影响

本研究探讨了聚合物中间膜对摩擦搅拌焊接 EN AW-2024-T3 铝合金接头的机械性能和断裂行为的影响。Aqualock AL 6002（粘合剂_1）和 3M Adhesion Promoter 86A（粘合剂_2）被选为 EN AW-2024-T3 铝合金接口的聚合物密封剂。力分析表明，聚合物中间膜的选择对焊接过程中的轴向力有很大影响，与其他变体相比，Adhesive_1 接头的力明显减小。在 FSW 过程中，Adhesive_1 的轴向力比 Adhesive_2 小 18%。横截面分析显示了接头形态和缺陷的明显特征，与粘合剂_2 相比，粘合剂_1 接头具有良好的热稳定性，缺陷极少。拉伸强度分析表明，Adhesive_1（9470N）接头的承载能力显著提高，而 Adhesive_2（5030N）接头由于热流不足而强度降低。与粘合剂_2 相比，粘合剂_1 接头的拉伸强度提高了 93%。粘合剂_2 与接头区域混合后产生了坚硬的复杂颗粒，降低了最终接头的强度。断裂分析显示了复杂的断裂机制，Adhesive_1 接头显示了韧性断裂区，而 Adhesive_2 接头则显示了准可溶解的晶间裂纹。显微硬度分布分析表明，接头变体之间存在差异，Adhesive_2 接头的焊点显微硬度较高。

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

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.