Investigation of microstructure and mechanical properties of GTAW and GMAW joints on AA7075 aluminum alloy

Author

Sivashanmugam, M. ; Jothi, Shanmugam C ; Kumar, Tanesh ; Sathishkumar, M.

Author_Institution

Dept. of Mech. & Production Eng., Sathyabama Univ., Chennai, India

fYear

2010

fDate

25-27 Nov. 2010

Firstpage

241

Lastpage

246

Abstract

Aluminum and its alloys have been used extensively due to their light weight, moderate strength and good corrosion resistance. Aluminium alloy 7075 has been researched upon especially as a potential candidate for aircraft material. This alloy is difficult to weld using conventional welding techniques like GMAW and GTAW. An attempt has been made in this investigation to weld 7075 alloy using GTAW and GMAW with argon as a shielding gas. Mechanical properties of the joint like tensile strength, Hardness and impact strength have been tested and reported. Microstructural characterization has been done using standard metallography. SEM micrographs have also been taken to study the fracture characteristics.

Keywords

aerospace materials; aluminium alloys; fracture; fracture toughness; fracture toughness testing; hardness; hardness testing; impact strength; impact testing; tensile strength; GMAW joint; GTAW joint; SEM micrographs; aircraft material; aluminum alloy; argon; corrosion resistance; fracture characteristics; hardness; impact strength; mechanical property; metallography; microstructural characterization; microstructure; shielding gas; tensile strength; weld alloy; welding technique; Aluminum alloys; Joints; Materials; Microstructure; Welding; AA 7075 aluminum allo; Gas metal arc welding; Gas tungsten arc welding; Mechanical properties; Microstructure characterization;

fLanguage

English

Publisher

ieee

Conference_Titel

Frontiers in Automobile and Mechanical Engineering (FAME), 2010

Conference_Location

Chennai

Print_ISBN

978-1-4244-9081-3

Type

conf

DOI

10.1109/FAME.2010.5714843

Filename

5714843