Comparison of numerical and experimental macrostructure in Nd: YAG laser welding of Hastelloy C-276

In this study, an attempt is made to correlate the macrostructure of Nd: YAG laser butt welded Hastelloy C-276 joints obtained by numerical and experimental methods, and which were performed at varied process parameters viz., welding speed (350 mm/min-450 mm/min), pulse energy (10–14 J/mm) and pulse...

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Bibliographic Details
Published in:Optik (Stuttgart) 2019-02, Vol.180, p.562-568
Main Authors: Saravanan, S., Raghukandan, K., Kumar, G. Shanthos
Format: Article
Language:English
Subjects:
Hardness
Hastelloy
Macrostructure
SYSWELD
YAG laser welding
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Summary:In this study, an attempt is made to correlate the macrostructure of Nd: YAG laser butt welded Hastelloy C-276 joints obtained by numerical and experimental methods, and which were performed at varied process parameters viz., welding speed (350 mm/min-450 mm/min), pulse energy (10–14 J/mm) and pulse duration (6–8 ms). The numerical macrostructure of the weld zone is determined in SYSWELD 16 - a 3D finite element software package, while experimentation was performed in a 600 W Nd: YAG laser welding machine. Complete penetration is observed for the attempted conditions, though the morphology of the laser weld differs. The variation in the temperature distribution across the various regions of the weld zone and the hardness distribution is reported.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2018.11.139