Indian Welding Journal

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Mechanical Properties of TIG Welded Al-Zn-Mg Alloy


Affiliations
1 Welding Research Laboratory, Deptt. of Mechanical & Industrial Engg., University of Roorkee, Roorkee-247 667, India
2 Fachhochschule fur Technik Kanalstrasse 33, D-7300, Esslingen (FRG), Germany
     

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Welding of Al-Zn-Mg alloy has been carried out by using AG conventional continuous current and pulsed current and pulsed current Tungsten inert gas (TIG) welding processes. The influence of various welding parameters on the soundness of the weld was studied by estimation of flaws in it. The effect of flaw size present like a crack inside the weld on the tensile strength of the weld has been determined. The influence of flaw size on the fracture toughness of the weld deposit has also been studied. It has been observed that for small flaws the failure is net stress controlled, whereas for large flaws the failure has been found to be stress intensity controlled.
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  • Mechanical Properties of TIG Welded Al-Zn-Mg Alloy

Abstract Views: 302  |  PDF Views: 4

Authors

D. K. Singh
Welding Research Laboratory, Deptt. of Mechanical & Industrial Engg., University of Roorkee, Roorkee-247 667, India
P. K. Ghosh
Welding Research Laboratory, Deptt. of Mechanical & Industrial Engg., University of Roorkee, Roorkee-247 667, India
M. Breazu
Welding Research Laboratory, Deptt. of Mechanical & Industrial Engg., University of Roorkee, Roorkee-247 667, India
L. Issler
Fachhochschule fur Technik Kanalstrasse 33, D-7300, Esslingen (FRG), Germany

Abstract


Welding of Al-Zn-Mg alloy has been carried out by using AG conventional continuous current and pulsed current and pulsed current Tungsten inert gas (TIG) welding processes. The influence of various welding parameters on the soundness of the weld was studied by estimation of flaws in it. The effect of flaw size present like a crack inside the weld on the tensile strength of the weld has been determined. The influence of flaw size on the fracture toughness of the weld deposit has also been studied. It has been observed that for small flaws the failure is net stress controlled, whereas for large flaws the failure has been found to be stress intensity controlled.