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EFFECTS OF POST WELD HEAT TREATMENT (PWHT) ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF EN AW-6082 T6 ALUMINUM ALLOY

1 LUCIAN Ciprian Pavel
Co-authors:
2 MITELEA Ion 3 UŢU Ion Dragoş 4 Crăciunescu Corneliu Marius
Institutions:
1 Politehnica University of Timisoara, Timisoara, Romania, EU, ciprian.lucian@student.upt.ro
2 Politehnica University of Timisoara, Timisoara, Romania, EU, ion.mitelea@upt.ro
3 Politehnica University of Timisoara, Timisoara, Romania, EU, dragos.utu@upt.ro
4 Politehnica University of Timisoara, Timisoara, Romania, EU, corneliu.craciunescu@upt.ro
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1247-1252
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
DOI:
https://doi.org/10.37904/metal.2019.741
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
788 views / 355 downloads
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Abstract

The issues which appears at fusion welding of 6082 T6 aluminum alloy are connected with hot cracking (solidification and liquation crackings), porosity and over aging of a portion from heat-affected zone (HAZ). Relatively high thermal expansion and the wide range solidification temperature of the Al alloy are the main causes of susceptibility to welding cracking. Moreover, over aging phenomenon of a portion from HAZ, due to the welding thermal cycle is manifested by the decrease in hardness and mechanical strength of the welded joint. The main objective followed by this paper is to restore the microstructure and the mechanical properties of the pulsed MIG welded joints made from 5 mm thickness sheets by applying a post weld heat treatment of solution quenching followed by artificial aging.

Keywords: Welding, heat treatment, microstructure

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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