Open AccessInfluence of Filler Wire Feed Speed on Microstructure and Properties of MIG Welding of 7005 Aluminum Alloy
Author(s) -
Xiang Zhang,
Dejie Xie,
Bo Chen
Publication year - 2019
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/612/2/022093
Subject(s) - welding , materials science , dimple , filler metal , gas metal arc welding , heat affected zone , composite material , ultimate tensile strength , metallurgy , joint (building) , flash welding , microstructure , alloy , base metal , tensile testing , fracture (geology) , electric resistance welding , aluminium , arc welding , structural engineering , engineering
Metal inert-gas welding (MIG) test was carried out using ER5356 welding wire as filler metal and 7005 aluminum alloy plate as base material. Different welding samples were obtained by changing the filler wire feed speed, and their microstructure and mechanical properties were observed and tested. The results show that the MIG welding joint of 7005 aluminum alloy usually consists of 3 parts: welding metal, heat affected zone and base material zone. The lowest hardness of the MIG welding joint is in the weld seam, which is the weakest position of the welding joint. The largest tensile strength of all the test samples is 303Mpa, which is 76.3% of the tensile strength of the base metal. The tensile fracture mode of all the test samples is dimple fracture, and the dimple fracture of the sample with a filler wire feed speed of 9.8m/min is small and dense, with the deepest depth of all the samples.