Improved Post-Weld Heat Treatment for Argon TIG Welded Joint of a New Al – Zn – Mg – Cu Alloy

An argon TIG welded joint of the Al – Zn –Mg – Cu alloy was studied. Based on the hardness and differential scanning calorimetry studies, a post-weld alloy heat treatment regimen has been proposed to ensure a welded joint strength of 622 MPa versus the strength of the base metal of 676 MPa. The post...

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Bibliographic Details
Published in:Metal science and heat treatment 2018-09, Vol.60 (5-6), p.399-402
Main Authors: Zhang, Liang, Li, Xiaoyan, Nie, Zuoren, Huang, Hui, Niu, Lanqiang
Format: Article
Language:English
Subjects:
Aging (artificial)
Aluminum base alloys
Argon
Base metal
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Copper
Copper base alloys
Engineering Thermodynamics
Heat and Mass Transfer
Heat treating
Magnesium
Materials Science
Metallic Materials
Post-weld heat treatment
Solid solutions
Solution heat treatment
Welded joints
Zinc
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Summary:An argon TIG welded joint of the Al – Zn –Mg – Cu alloy was studied. Based on the hardness and differential scanning calorimetry studies, a post-weld alloy heat treatment regimen has been proposed to ensure a welded joint strength of 622 MPa versus the strength of the base metal of 676 MPa. The post-weld heat treatment provides for a two-stage solid solution treatment (470°C, 90 min + 500°C, 20 min) and artificial aging at 120°C for 24 h.
ISSN:0026-0673
1573-8973
DOI:10.1007/s11041-018-0290-6