Pulse MIG Welding of 6061-T6/A356-T6 Aluminum Alloy Dissimilar T-joint

Dissimilar T-joints between 4-mm-thick wrought 6061-T6 and cast A356-T6 aluminum alloy plates are made with pulse metal inert gas welding (P-MIG) process, and the weld geometry, microstructure and mechanical properties of the joints are investigated. The average tensile load of the joints is 9488 N...

Full description

Saved in:
Bibliographic Details
Published inJournal of materials engineering and performance Vol. 27; no. 9; pp. 4760 - 4769
Main Authors Li, Peng, Nie, Fuheng, Dong, Honggang, Li, Shuai, Yang, Guoshun, Zhang, Hai
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2018
Subjects
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
P-MIG
mechanical property
microstructure
weld geometry
dissimilar aluminum alloy
T-joint
Online AccessGet full text

Cover

More Information
Summary:Dissimilar T-joints between 4-mm-thick wrought 6061-T6 and cast A356-T6 aluminum alloy plates are made with pulse metal inert gas welding (P-MIG) process, and the weld geometry, microstructure and mechanical properties of the joints are investigated. The average tensile load of the joints is 9488 N at travel speed 12 mm/s and welding current 165 A with 6061 aluminum alloy as web plate and A356 aluminum alloy as flange plate. The weld zone (WZ) is composed of dendrite zone and columnar zone, which is wide at bottom of weld making it become a weak zone. Besides, grain boundary (GB) liquation, consisting of GB eutectic and solute-depleted α-Al, occurs in the partially melted zone on 6061 aluminum alloy side. The T-joint with highest tensile load fails at the root of WZ and the flange plate near the weld with different fracture modes.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-018-3528-y