Open AccessInfluence of Tool Pin Profile on Mechanical Properties and Microstructure of Friction Stir Welded Aluminium AA7075 Alloy
Author(s) -
G. Venkateswarlu
Publication year - 2020
Publication title -
international journal of modern trends in science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-3778
DOI - 10.46501/ijmtst061002
Subject(s) - equiaxed crystals , materials science , microstructure , friction stir welding , welding , aluminium , rotational speed , alloy , metallurgy , aluminium alloy , traverse , composite material , mechanical engineering , engineering , geodesy , geography
The present investigation describes the effect of different tool pin profiles on microstructure and mechanicalproperties of friction stir welded aluminium AA-7075 alloy. The tool pin profiles namely taper cylindricalthreaded (TT), cylindrical (CT), square (SQ), triangular (TR), pentagonal (PT), hexagonal (HX) with constantshoulder diameter have been selected to make joints. The friction stir welding was done at constant toolrotational speed and traverse speed. From this study, it is noted that the weld joints prepared using tapercylindrical threaded pin profile exhibited good mechanical properties when compared to other pin profiles. Itis due to more surface contact of tool pin and production of equiaxed fine grain structure in the weld region.