Contributor(s)
Andrew Socha
Publication Date
2013
Abstract
Magnesium is the lightest structural metal; therefore it has been used in a variety of industries such as automotive, aerospace, electronics and defense. Among different joining processes, laser welding is advantageous due to its low heat input, high depth-to-width weld ratio and good mechanical properties. In this study, a fiber laser is used to weld AZ31B magnesium alloy in a lap joint configuration. Pores were formed in the weld bead that are caused by a thick oxide layer existing on the surface of as-received AZ31B samples. Process parameters including laser power and welding speed are studied to determine their effects on pore formation and maximum lap-shear load of the weld bead. Hardness and tensile tests are carried out to reveal the mechanical properties of the weld bead. A regression analysis is performed that establishes a mathematical relation between the process parameters and the weld maximum lap-shear load. Three regression models are compared in order to determine their accuracy in prediction of the maximum lap-shear load and results revealed that the linear model could best predict the maximum lap-shear load by process parameters.
Document Type
Conference Proceeding
Keywords
laser welding, process parameters, Magnesium, porosity, melting ratio
Disciplines
Engineering | Manufacturing | Mechanical Engineering
Extent
12 pages
Format
Language
English
Recommended Citation
M. Harooni, B. Carlson, R. Kovacevic, "Effect of Process Parameters on the Weld Quality in Laser Welding of AZ31B Magnesium Alloy in Lap Joint Configuration", ICALEO 2013, Miami, FL., pp. 509-519.
Notes
This paper was presented at ICALEO 2013 in Miami, FL.