Open AccessEffect of preheat and post heat on mechanical properties of 6061 aluminium tungsten inert gas welded joints
Author(s) -
Alfian Hamsi,
Tulus Burhanuddin Sitorus,
Reflina Sinaga
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/801/1/012086
Subject(s) - gas tungsten arc welding , welding , materials science , aluminium , metallurgy , inert gas , tungsten , ultimate tensile strength , inert , heat affected zone , composite material , arc welding , chemistry , organic chemistry
Tungsten inert gas (TIG) welded joints of 6061 aluminium are often used in the fuel tanks of large launch vehicles, because of the massive loads these vehicles carry, dealing with weld reinforcement on TIG joints represents an important issue in their preheat and post heat on mechanical properties. Experimental and calculation methods were used to investigate the effect of weld preheat and post heat on the mechanical properties of these joints. The purpose of this study was to determine the effect of preheat and post heat on mechanical properties of 6061 aluminium. The experimental result indicated that mechanical properties of Al 6061 of the welding changed. The hardness of weld metal increase in temperature 130°C = 68,72 BHN, in 160°C = 70,51 BHN, and in 190°C = 76,26 BHN. Tensile strength also increase in temperature 130°C = 158,57 N/mm 2 , in 160°C = 169,85 N/mm 2 , in 190°C = 174,50 N/mm 2 .