Effects of surface conditions on resistance spot welding of Mg alloy AZ31 Journal Articles

abstract

• In this work, resistance spot welding of Mg alloy AZ31 sheets was investigated in as received and acid cleaned surface conditions. As received sheets had higher contact resistance which required lower current thresholds for weld initiation and for four root t nugget size (where t is sheet thickness). However, it also led to both serious expulsion and internal defects. The fracture mode of welds in as received sheets was interfacial failure while that of the acid cleaned specimens shifted from interfacial to nugget pullout and exhibited better strength. The acid cleaned sheets also produced less damage on electrode tip faces.

authors

• Liu, L
• Zhou, SQ
• Tian, YH
• Feng, JC
• Jung, JP
• Zhou, Norman

status

• published 

publication date

• May 2009

has subject area

• 09 Engineering (FoR)
• Materials (Science Metrix)

published in

• Science and Technology of Welding and Joining  Journal

keywords

• 40 Engineering
• 4014 Manufacturing Engineering

Digital Object Identifier (DOI)

• 10.1179/136217108x394726

start page

• 356

end page

• 361

volume

• 14

issue

• 4