Effect of tool pin profile on the heat generation model of the friction stir welding of aluminium alloy

IF 0.7 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Materials Research Pub Date : 2023-08-31 DOI:10.1515/ijmr-2022-0217

Rahul Kesharwani, Kishor Kumar Jha, C. Sarkar, M. Imam

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Abstract

Abstract The present work aims to model the three-dimensional heat transfer coupled with the material flow model of 7075-T6 aluminium alloy material using the three tool pin profiles, square, pentagon, and hexagon, in the friction stir welding process. The temperature rise and fluid flow behaviour from the top to the bottom of the tool were evaluated. Also, the strain rate and dynamic viscosity variation were found near the tool pin and shoulder region. The results showed that the frictional contact heat between the shoulder surface and workpiece was responsible for the maximum heat generation. The probe area was minimum in the square tool pin geometry, which results in high heat generation due to the maximum shoulder surface contact area with the workpiece model. Furthermore, the analytical formula for calculating the heat generation on the tool shoulder/workpiece interface and the tool pin/workpiece contact region were also evaluated. The numerical modelling of heat generation was evaluated by COMSOL Multiphysics V5.3a software.

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刀具销型对铝合金搅拌摩擦焊热生成模型的影响

摘要本文采用方形、五角形和六角形三种刀具销型，对7075-T6铝合金材料在搅拌摩擦焊接过程中的三维传热耦合流动模型进行了建模。对工具从顶部到底部的温升和流体流动行为进行了评估。此外，应变速率和动态黏度在刀销和肩附近也有变化。结果表明，肩部表面与工件之间的摩擦接触热是产生最大热量的原因。在方形工具销几何形状中，探头面积最小，由于与工件模型的最大肩表面接触面积导致高热量产生。此外，还对刀肩/工件界面和刀销/工件接触区域产热的解析公式进行了评价。利用COMSOL Multiphysics V5.3a软件对热生成进行数值模拟。

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

International Journal of Materials Research 工程技术-冶金工程

CiteScore

1.30

自引率

12.50%

发文量

119

审稿时长

6.4 months

期刊介绍： The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.