Influence of Tool Probe Profiles on the Microstructure Evolution and Mechanical Properties of Al–Zn–Mg–Cu Alloy Friction Stir Weldment

IF 1.6 4区材料科学 Q2 Materials Science

Transactions of The Indian Institute of Metals Pub Date : 2024-07-01 DOI:10.1007/s12666-024-03388-8

B. Nikhil, P. Govindan, D. Sunilkumar, M. P. Roshindas

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Abstract

The present study aims to investigate the influence of tool profiles such as hybrid square, hybrid triangular and conventional threaded tapered on the microstructure evolution and mechanical properties of the aluminium alloys of grade AA7075-T651. The softening of the thermo mechanical affected zone/heat affected zone is the main issue, and it weakens the weldment, which in turn is detrimental to the mechanical properties. There are limited studies on the influence of tool profiles on the mechanical properties of FSW of AA7075-T651. The weld joints were fabricated with the optimised parameters using the design of experiment ANOVA analysis. The processed weldments with all three tool profiles are characterised on the ground of microstructure evolution using optical microscopy, electron back scattered diffraction and correlated with mechanical properties such as hardness and tensile test. The results conceded that the hybrid square tool profile has a maximum ultimate strength of 450.3 MPa and elongation of 7% with process parameters such as rotational speed of 1325 rpm and 120 mm/min.

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工具探针剖面对 Al-Zn-Mg-Cu 合金摩擦搅拌焊接微观结构演变和力学性能的影响

本研究旨在探讨混合方形、混合三角形和传统螺纹锥形等工具轮廓对 AA7075-T651 级铝合金微观结构演变和机械性能的影响。热机械影响区/热影响区的软化是主要问题，它会削弱焊接件，进而损害其机械性能。关于工具轮廓对 AA7075-T651 FSW 机械性能影响的研究十分有限。采用实验设计方差分析法对焊接接头的参数进行了优化。使用光学显微镜、电子背散射衍射法对三种工具轮廓加工的焊缝进行了微观结构演变表征，并将其与硬度和拉伸试验等机械性能相关联。结果表明，在转速为 1325 转/分钟和速度为 120 毫米/分钟的工艺参数下，混合方形刀具的最大极限强度为 450.3 兆帕，伸长率为 7%。

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来源期刊

Transactions of The Indian Institute of Metals Materials Science-Metals and Alloys

CiteScore

2.60

自引率

6.20%

发文量

期刊介绍： Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering. Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.