Open AccessThe Effects of In-Process Cooling during Friction Stir Welding of 7475 Aluminium Alloy
Author(s) -
Ashish Jacob,
Sachin Maheshwari,
Arshad Noor Siddiquee,
Abdulrahman AlAhmari,
Mustufa Haider Abidi,
S. V. Konovalov,
Xizhang Chen
Publication year - 2021
Publication title -
sains malaysiana
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 29
eISSN - 2735-0118
pISSN - 0126-6039
DOI - 10.17576/jsm-2021-5009-20
Subject(s) - welding , materials science , friction stir welding , metallurgy , fusion welding , friction welding , aluminium , joint (building) , aluminium alloy , microstructure , alloy , cold welding , heat affected zone , gas metal arc welding , structural engineering , engineering
Certain age hardenable alloys such as AA7475 cannot be joined with perfection using fusion welding techniques. This requires non-conventional welding technique such as friction stir welding process to join these ‘difficult to weld’ alloys. In this study, three different cooling conditions i.e. cryogenic, sub-zero, and zero-degree Celsius temperature conditions have been analyzed to understand its impact on the welding process. In-process cooling was found to behave effectively and also enhanced the mechanical properties of the welded joints. A stable microstructure was clearly seen in the images observed under the metallurgical microscope. The weld efficiencies were found to be good in each of the samples which are indicative of a strong metallic joint. The effective cooling conditions employed had an overall positive impact on the joint.