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Characterization of microstructure, weld heat input, and mechanical properties of Mg−Al−Zn alloy GTA weldments
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Babu, Nagumothu Kishore, Talari, Mahesh Kumar, Srirangam, Prakash, AlFaify, Abdullah Yahia and Rehman, Ateekh Ur (2022) Characterization of microstructure, weld heat input, and mechanical properties of Mg−Al−Zn alloy GTA weldments. Applied Sciences, 12 (9). e4417. doi:10.3390/app12094417 ISSN 2076-3417.
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Official URL: https://doi.org/10.3390/app12094417
Abstract
The present study investigated the influence of welding speed on the microstructure, hardness, and tensile properties of the AZ31 Mg alloy gas tungsten arc (GTA) welds that were prepared using alternating current (AC). A microstructural examination of the weld metal and base metal was performed using stereo, optical, and scanning electron microscopy (HR-SEM and EDS) techniques. The microstructure of all fusion zones consists of two parts: a columnar zone, adjacent to the fusion boundary, and equiaxed grains, in the centre of the weld fusion zone. It is shown that the average width of the equiaxed zone present at the centre of the fusion zone increases with increasing welding speed. Metallographic examination shows that the highest welding speed (5 mm/s) results in the smallest average grain size. The welds prepared with high welding speed exhibit an increase in strength, hardness, and ductility compared with other welding speeds, which is attributed to low heat input.
Item Type: | Journal Article | ||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TS Manufactures |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Library of Congress Subject Headings (LCSH): | Magnesium alloys, Magnesium alloys -- Welding , Aluminum-magnesium-zinc alloys -- Mechanical properties , Gas tungsten arc welding , Aluminum-magnesium-zinc alloys | ||||||
Journal or Publication Title: | Applied Sciences | ||||||
Publisher: | MDPI | ||||||
ISSN: | 2076-3417 | ||||||
Official Date: | 27 April 2022 | ||||||
Dates: |
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Volume: | 12 | ||||||
Number: | 9 | ||||||
Article Number: | e4417 | ||||||
DOI: | 10.3390/app12094417 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 31 May 2022 | ||||||
Date of first compliant Open Access: | 1 June 2022 | ||||||
RIOXX Funder/Project Grant: |
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