Open AccessINVESTIGATION OF WELDING SPEED ON FUSION ZONE CHARACTERISTICS OF GTA WELDED AZ31B MAGNESIUM ALLOY JOINTS
Author(s) -
Subravel,
M Thambidurai
Publication year - 2019
Publication title -
journal of manufacturing engineering
Language(s) - English
Resource type - Journals
ISSN - 0973-6867
DOI - 10.37255/jme.v4i4pp139-143
Subject(s) - welding , materials science , ultimate tensile strength , metallurgy , gas tungsten arc welding , tungsten , magnesium alloy , alloy , heat affected zone , joint (building) , fusion , fusion welding , composite material , magnesium , arc welding , structural engineering , engineering , linguistics , philosophy
In this investigation an attempt has been made to study the effect of welding on fusioncharacteristics of pulsed current gas tungsten arc welded AZ31B magnesium alloy joints. Five joints were fabricated using different levels of welding speed (105 mm/min –145 mm/min). From this investigation, it is found that the joints fabricated using a welding speed of 135 mm/min yielded superior tensile properties compared to other joints. The formation of finer grains and higher hardness in fusion zone and uniformly distributed precipitates are the main reasons for the higher tensile properties of these joints.