Studies on Dissimilar Welding of AA5083 and AA6061 Alloys by Laser Beam Welding

B. Srinivas; Katakam Sivaprasad; N. Kishore Babu; V. Muthupandi; P. Susila

doi:10.4028/www.scientific.net/AMR.626.701

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 626Studies on Dissimilar Welding of AA5083 and AA6061...

Studies on Dissimilar Welding of AA5083 and AA6061 Alloys by Laser Beam Welding

Abstract:

Dissimilar welds were prepared between 4 mm thick AA5083 and AA6061 sheets using Nd-YAG laser welding with different laser power, beam spot sizes and welding speeds. The results show that the temperature gradient and cooling rates play a major role in resultant microstructures of the weldments. Room temperature hardness and tensile properties of the weldments in the as-welded condition were studied and correlated with the microstructure. The microhardness examination showed that there was significant variation in hardness values at AA6061 side when compared with AA5083 side due to steeper temperature gradient. It has been observed that welds prepared with 3.5kW laser power, 3.5 m/min welding speed and 180 µm beam spot size exhibited highest tensile strength of 241 MPa.

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Advanced Materials Research (Volume 626)

Pages:

701-705

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.626.701

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Online since:

December 2012

Authors:

B. Srinivas, Katakam Sivaprasad, N. Kishore Babu, V. Muthupandi, P. Susila

Keywords:

Cooling Rate, Laser Beam Welding, Solidification, Temperature Gradient

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