Laser Welding Studies on a Co-based Superalloy

Satapathy, Yashobanta (2017) Laser Welding Studies on a Co-based Superalloy. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

The effect of laser welding of a cobalt based super alloy on the microstructure evolution and strength of the alloy was investigated. For this purpose, the alloy was welded by bead - on - plate type welding technique with CO 2 laser with a rgon as shielding gas and welding parameters are 3.5kw power, argon flow rate of 20lt/m i n, welding speed of 3m/m i n and 0.18mm beam diameter. Microstructural study revealed cuboidal morphology of the gamma prime precipitate in the base metal zone as well as fusion zone. There was a decrease in the hardness of the weld metal in comparison to the base metal. Hardness decreased from the base metal zone to the partially melted zone to the fusion zone due to decrease in precipitate size which act as a primary str engthening phase in this alloy.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Thesis (Masters)
Uncontrolled Keywords: TD843
Subjects: Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 30 Jun 2017 09:11
Last Modified: 30 Jun 2017 09:11
URI: http://raiith.iith.ac.in/id/eprint/3318
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