A Study on the Implication of Modified Joint Configuration in Friction Stir Welding

IF 0.3 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Soldagem & Inspecao Pub Date : 2021-01-01 DOI:10.1590/0104-9224/SI26.07

Uttam Acharya, Tanmoy Medhi, Durjyodhan Sethi, S. Choudhury, Abhijit Banik, S. C. Saha, B. S. Roy

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引用次数: 3

Abstract

The current investigation is a preliminary approach proposing the feasibility of a modified joint configuration namely double-butt-lap (DBL) in the field of friction stir welding (FSW). The main scope of adopting this kind of joint configuration is to essentially eliminate the irregularities in material flow and defects (root gap, kissing bond) that are observed while joining by using the commonly followed simple square butt joint configuration (SSB) technique. Two different geometries of the joint configuration are fabricated on 6 mm thick AA6061-T6 plates. FSW is carried out at a parametric combination of 1100 rpm, 75 mm/min and 1.5° tilt angle. The comparison of the macrographs of DBL with SSB reveals a quite distinct cross-sectional macrostructure of DBL from SSB in terms of material flow in the nugget zone (NZ). Sharp material flow lines without any macro defects are observed in the case of DBL 2. Mechanical test analysis reveals remarkable enhancement in the mechanical properties of some joint configuration of DBL over SSB. The current research work may act as a foundation for future research work in the utility of such configurations in the diverse field of FSW. Key-words: Friction stir welding, joint configuration; Macrostructure; Weld defects; Microstructure; Mechanical properties.

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改进接头结构对搅拌摩擦焊的影响研究

目前的研究是提出一种改进的连接结构即双对接(DBL)在搅拌摩擦焊接(FSW)领域的可行性的初步方法。采用这种连接形式的主要范围是为了从根本上消除通常采用的简单方对接连接形式(SSB)技术在连接过程中观察到的材料流动的不规则性和缺陷(根隙、亲和键)。在6mm厚的AA6061-T6板上制作了两种不同几何形状的接头配置。FSW在1100rpm、75mm /min和1.5°倾角的参数组合下进行。对DBL和SSB的宏观图进行比较，发现在核块区(NZ)的物质流动方面，DBL和SSB的横截面宏观结构非常不同。在dbl2的情况下，观察到尖锐的材料流线，没有任何宏观缺陷。力学试验分析表明，DBL的某些关节构型比SSB的力学性能有显著提高。目前的研究工作可以作为未来研究这种结构在FSW各个领域的应用的基础。关键词:搅拌摩擦焊;接头形态;宏观结构;焊接缺陷;微观结构;机械性能。

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

Soldagem & Inspecao 工程技术-冶金工程

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

12 weeks

期刊介绍： The Journal Soldagem & Inspeção (S&I) js a techno-scientific journal created in 1995. Printed issues of this journal are distributed free of charge to libraries in Brazil, Latin America and the Iberian Peninsula. It has been printed regularly every quarter since September, 2002, and, since the beginning of 2007, its electronic version is available in the address: (http://www.abs-soldagem.org.br/s&i/). The journal is sponsored by the Brazilian Welding Association (ABS). Since its creation several well known professionals working in welding contributed with the Journal Soldagem & Inspeção and its editorial board crosses the Brazilian borders. During its evolution the Journal received ta special contribution from the Editors-in-chief : Ronaldo Paranhos, Américo Scoti, Paulo Modenesi e Alexandre Bracarence. Since January 2012 the Editor-in-chief is Ana Sofia C. M. D’Oliveira, Full professor at Universidade Federal do Paraná (UFPR) . Her work focus mainly on Hardfacing and Physical Metallurgy. The jornal Soldagem & Inspeção also counts with 10 Associate Editors and a fix Editorial board of referees. short-term (Ad Hoc) referees can be invited to evaluate some papers submitted to the journal. The Soldagem & Inspeção journal is the scientific divulgation channel of the Brazilian Welding Association (ABS). It aims to publish original papers related to the scientific and technological development of welding, inspection, and related fields. Review papers or letters on current and controversial subjects are also published in the Journal. Its abbreviated title is Soldag. insp. (Impr.), which should be used in bibliographies, footnotes and bibliographical references and strips.