Influence of tool plunging rate on mechanical properties and microstructure of friction stir welded DMR249A high strength low alloy (HSLA) steel butt joints-Reference-Cited by-同舟云学术

Influence of tool plunging rate on mechanical properties and microstructure of friction stir welded DMR249A high strength low alloy (HSLA) steel butt joints

Published:2023-08-21 Issue:10 Volume:65 Page:1528-1538
ISSN:0025-5300
Container-title:Materials Testing
language:en
Short-container-title:

Author:

Nathan Seerangan Ragu¹^ORCID,Balasubramanian Visvalingam²^ORCID,Gourav Rao Ardula³^ORCID,Sonar Tushar⁴^ORCID,Ivanov Mikhail⁴^ORCID,Rajendran Chinnasamy⁵^ORCID

Affiliation:

1. Micromachining Research Centre (MMRC), Department of Mechanical Engineering , Sree Vidyanikethan Engineering College , Tirupati , 517102 , Andhra Pradesh , India

2. Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering , Annamalai University , Chidambaram , 608002 , Tamil Nadu , India

3. DRDO Naval Materials Research Laboratory (NMRL) , Ambernath, 421506 , Maharashtra , India

4. Department of Welding Engineering , Institution of Engineering and Technology, South Ural State University (National Research University) , Chelyabinsk , 454080 , Russian Federation

5. Department of Mechanical Engineering, Sri Krishna College of Engineering and Technology , Coimbatore , 641008 , Tamil Nadu, India

Abstract

Abstract The main aim of this study is to analyse the influence of tool plunging rate on tool wear and stir zone characteristics of DMR249A high strength low alloy (HSLA) steel joints developed using friction stir welding (FSW). The HSLA steel plates were welded at five levels of tool plunging rates varying from 2.0 mm min−1 to 3.0 mm min−1. The tool rotational speed of 600 rpm and welding speed of 30 mm min−1 were kept constant during welding. The wear of FSW tool was analysed by microscopic observations of tool condition after welding, stir zone characteristics, weight loss measurement and pin profile analysis. The characterization techniques of optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to analyse the microstructural characteristics of stir zone of welded joints. Results disclosed that the severe degradation of FSW tool occurred due to the sudden dynamic impact load on tool pin while plunging and more diffusion of work piece material into the tool pin which leads to insufficient plasticized material flow. The tool plunging rate of 2.5 mm min−1 showed minimum tool wear and produced defect free sound joint.

Funder

DRDO, Naval Material Research Laboratory (NMRL), Ambernath, India

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.degruyter.com/document/doi/10.1515/mt-2023-0043/pdf

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