Mechanical Behaviour of MAG Pulsed Welded Joints from 6082 T6 Aluminium Alloy

7th International Conference on Advanced Materials and Structures

Lucian, C.P.^1 ; Mitelea, I.^1 ; Burc, M.^1 ; Uu, I.D.^1

University Politehnica Timisoara, Piata Victoriei no. 2, Timisoara, Romania^1

关键词: 6082-T6 alloys;    Base metals;    Fusion welding;    Mechanical behaviour;    Mechanical resistance;    Micro-structural;    Over-aging;    Thick sheets;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/416/1/012009/pdf
DOI  :  10.1088/1757-899X/416/1/012009

来源: IOP

【 摘 要 】

One of the difficulties encountered by aluminum alloys fusion welding consist in reducing of the mechanical resistance characteristics of the weld seam and of the heat-affected zone (HAZ) compared to those of the base metal. The paper investigates the microstructural and mechanical properties changes of pulsed MAG welded joints made from the 6082-T6 alloy delivered in the form of 5 mm thick sheets. The dissolving phenomena of the hardenable phases in the sub-zones near the molten metal bath and the overaging of alloy in HAZ sub-zones at temperatures lower than those of precipitates redissolving, justifies the decrease of the mechanical resistance in the HAZ zone.