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Lupine Publishers Group

Lupine Publishers


ISSN: 2641-6921

Modern Approaches on Material Science

Research Article(ISSN: 2641-6921)

Effect of Laser Welding Parameters on Porosity of Welds in Cast Magnesium Alloy AM50

Volume 1 - Issue 2

Karl Fahlström1*, Jon Blackburn2, Leif Karlsson3 and Lars-Erik Svensson3

  • Author Information Open or Close
    • 1Swerea KIMAB, Kista, University West, Sweden
    • 2The Welding Institute, Great Britain
    • 3University West, Sweden

    *Corresponding author: Karl Fahlström, Swerea KIMAB, Isafjordsgatan 28A, 164 40 Kista, Sweden

Received: December 03, 2018;   Published: December 14, 2018

DOI: 10.32474/MAMS.2018.01.000106

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Pores in the weld metal lower the mechanical properties of the weld. It is therefore important to understand the pore formation mechanisms and find procedures that could reduce porosity. This study focused on laser welding of 3 mm thick magnesium alloy AM50, investigating how different parameters affect porosity formation. Low levels of porosity content were achieved by either increasing the welding speed or using a two-pass welding approach. It was found that higher welding speeds did not allow pores, which were pre-existing from the die-casting process, to have sufficient time to coalesce and expand. In the two-pass welding technique, pores were removed as a result of a degassing process which occurred through the second pass.

Keywords: Laser welding; Magnesium, Cast; Metallurgy; Porosity; Automotive; AM50

Abstract| Introduction| Experimental| Results| Effect of Welding Parameters on Porosity| Discussion| Conclusion| Acknowledgement| References|


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