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EN AW-2024-T3铝合金接头搅拌摩擦焊参数的多准则优化

Multi-Criteria Optimisation of Friction Stir Welding Parameters for EN AW-2024-T3 Aluminium Alloy Joints.

作者信息

Kubit Andrzej, Trzepieciński Tomasz, Kluz Rafał, Ochałek Krzysztof, Slota Ján

机构信息

Department of Manufacturing and Production Engineering, Rzeszow University of Technology, al. Powst. Warszawy 8, 35-959 Rzeszów, Poland.

Department of Mechanical Engineering, State School of Higher Vocational Education, Rynek 1, 38-400 Krosno, Poland.

出版信息

Materials (Basel). 2022 Aug 7;15(15):5428. doi: 10.3390/ma15155428.

DOI:10.3390/ma15155428
PMID:35955362
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9369800/
Abstract

The aim of this research was the selection of friction stir welding (FSW) parameters for joining stiffening elements (Z-stringers) to a thin-walled structure (skin) made of 1 mm-thick EN AW-2024 T3 aluminium alloy sheets. Overlapping sheets were friction stir welded with variable values of welding speed, pin length (plunge depth), and tool rotational speed. The experimental research was carried out based on a three-factor three-level full factorial Design of Experiments plan (DoE). The load capacity of the welded joints was determined in uniaxial tensile/pure shear tests. Based on the results of the load capacity of the joint and the dispersion of this parameter, multi-criteria optimisation was carried out to indicate the appropriate parameters of the linear FSW process. The optimal parameters of the FSW process were determined based on a regression equation assessed by the Fisher-Senecor test. The vast majority of articles reviewed concern the optimisation of welding parameters for only one selected output parameter (most often joint strength). The aim of multi-criteria optimisation was to determine the most favourable combination of parameters in terms of both the smallest dispersion and highest load capacity of the joints. It was found that an increase in welding speed at a given value of pin length caused a decrease in the load capacity of the joint, as well as a significant increase in the dispersion of the results. The use of the parameters obtained as a result of multi-criteria optimisation will allow a minimum load capacity of the joints of 5.38 kN to be obtained with much greater stability of the results.

摘要

本研究的目的是选择搅拌摩擦焊（FSW）参数，用于将加强元件（Z形桁条）连接到由1毫米厚的EN AW-2024 T3铝合金薄板制成的薄壁结构（蒙皮）上。采用不同的焊接速度、销钉长度（ plunge深度）和工具转速对搭接板材进行搅拌摩擦焊。基于三因素三水平全因子实验设计方案（DoE）开展了实验研究。通过单轴拉伸/纯剪切试验测定焊接接头的承载能力。基于接头承载能力的结果以及该参数的离散度，进行了多准则优化，以确定线性搅拌摩擦焊工艺的合适参数。搅拌摩擦焊工艺的最佳参数是根据通过Fisher-Senecor检验评估的回归方程确定的。绝大多数综述文章仅针对一个选定的输出参数（最常见的是接头强度）优化焊接参数。多准则优化的目的是确定在接头离散度最小和承载能力最高方面最有利的参数组合。研究发现，在给定销钉长度值时，焊接速度的增加会导致接头承载能力下降，以及结果离散度显著增加。使用多准则优化得到的参数将能够获得最小承载能力为5.38 kN的接头，且结果的稳定性更高。

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