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INVESTIGATING TIG ARC WELDMENTS FOR AUSTENITIC STAINLESS STEEL 304 AND 304L: A MECHANICAL AND METALLURGICAL ANALYSIS

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Last updated: 29 Dec 2024

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Abstract

In this study, the mechanical properties and microstructural characteristics of welded joints made from stainless steels 304 and 304L were investigated with respect to the applied TIG welding parameters, including the filler type and applied current. Two different filler electrodes (ER304 and ER309) were used, and two distinct currents (70 and 80 A) were applied during the welding process. The dissimilar metals being joined had a thickness of 2 mm. The welded joints were evaluated using X-Ray radiography examination, tensile strength testing, microhardness testing, and microstructure investigation under all proposed welding conditions. The examination results revealed that all welding passes were continuous and free of internal defects, except for the samples welded with ER309 at 70 A. The sample welded with ER304 at 80 A demonstrated the highest average maximum tensile strength (UTS) of 692 MPa, while the sample welded with ER309 at 70 A had the lowest average UTS of 670 MPa. It was observed that welding with 80 A resulted in higher mechanical properties than welding with 70 A. The microhardness of the base metal (BM), heat-affected zone (HAZ), and weld zone (WZ) was measured for all welding conditions. A dendritic structure was formed at the WZ of the welded joints, with ferrite and austenite homogeneously distributed throughout. Consequently, based on the excellent properties obtained, ER304 at 80 A is recommended for high-tech industrial applications.

DOI

10.21608/erjsh.2023.228930.1205

Keywords

Austenitic Stainless Steel, TIG welding, Welding Parameters, Mechanical performance

Authors

First Name

rasha

Last Name

afify

MiddleName

-

Affiliation

Department of Mechanical Engineering, Faculty of Engineering at Shoubra, Benha University, Cairo 11629, Egypt.

Email

remasm7md33@gmail.com

City

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Orcid

-

First Name

Hamed

Last Name

Abdel-Aleem

MiddleName

A.

Affiliation

Welding Technology and NDT Department, Central Metallurgical Research and Development Institute (CMRDI), Cairo 11422, Egypt

Email

hamedaa@gmail.com

City

-

Orcid

-

First Name

Mohammed

Last Name

Gamil

MiddleName

-

Affiliation

Department of Mechanical Engineering, Faculty of Engineering at Shoubra, Benha University, Cairo 11629, Egypt.

Email

mohammed.gamil@feng.bu.edu.eg

City

-

Orcid

https://orcid.org/00

Volume

53

Article Issue

1

Related Issue

45043

Issue Date

2024-01-01

Receive Date

2023-08-17

Publish Date

2024-01-01

Page Start

181

Page End

188

Print ISSN

3009-6049

Online ISSN

3009-6022

Link

https://erjsh.journals.ekb.eg/article_341620.html

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https://erjsh.journals.ekb.eg/service?article_code=341620

Order

341,620

Type

Research articles

Type Code

2,276

Publication Type

Journal

Publication Title

Engineering Research Journal (Shoubra)

Publication Link

https://erjsh.journals.ekb.eg/

MainTitle

INVESTIGATING TIG ARC WELDMENTS FOR AUSTENITIC STAINLESS STEEL 304 AND 304L: A MECHANICAL AND METALLURGICAL ANALYSIS

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Article

Created At

29 Dec 2024