Microstructure and Mechanical Properties of Welded Joints of Aluminum Alloy AA7020-T6 Obtained by Friction Stir Welding


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Abstract

Plates from alloy AA7020 (Al – Zn – Mg) with a thickness of 4.5 mm are studied after T6 heat treatment and friction stir welding. Tensile and bending tests are performed. The hardness of the welds is measured in transverse direction. The microstructure over cross section of a weld is studied by the methods of light and transmission electron microscopy. The weldability of alloy AA7020 by friction stir welding is shown to be high.

About the authors

G. Srinivasa Rao

Department of Mechanical Engineering, SRM University

Author for correspondence.
Email: gsrinu1882@gmail.com
India, NCR Campus, Delhi

V. V. Subba Rao

Department of Mechanical Engineering, JNTUK

Email: gsrinu1882@gmail.com
India, Kakinada

S. R. K. Rao

Department of Mechanical Engineering, SSN College of Engineering

Email: gsrinu1882@gmail.com
India, Chennai

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