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Studies on the weldability, microstructure and mechanical properties of flux assisted Nd:YAG laser welds of AISI 904L

Devendranath Ramkumar, K. ; Chaitanya, Gangineni ; Narasimha Varma, Jelli Lakshmi ; Choudhary, Ayush ; Arivazhagan, N. ; Oyyaravelu, R.

Journal of materials research, 2015-08, Vol.30 (15), p.2369-2379 [Periódico revisado por pares]

New York, USA: Cambridge University Press

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Título:
Studies on the weldability, microstructure and mechanical properties of flux assisted Nd:YAG laser welds of AISI 904L
Autor: Devendranath Ramkumar, K. ; Chaitanya, Gangineni ; Narasimha Varma, Jelli Lakshmi ; Choudhary, Ayush ; Arivazhagan, N. ; Oyyaravelu, R.
Assuntos: Analysis ; Applied and Technical Physics ; Biomaterials ; Cellular ; Dendritic structure ; Flux ; Gas flow ; Gases ; Inorganic Chemistry ; Investigations ; Laser beam welding ; Lasers ; Materials Engineering ; Materials Science ; Mechanical properties ; Microstructure ; Nanotechnology ; Plasma ; Protective coatings ; Silicon dioxide ; Stainless steel ; Studies ; Tensile strength ; Thick plates ; Welding
É parte de: Journal of materials research, 2015-08, Vol.30 (15), p.2369-2379
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: This research article investigates the effect of SiO2 flux on Nd:YAG laser welding of 5 mm thick plates of super-austenitic stainless steel, AISI 904L. Microstructure studies revealed multidirectional grain growth comprising columnar and cellular dendrites along with a prominent, fine equiaxed dendritic growth at the centerline of the fusion zone. Tensile studies showcased the fracture at the fusion zone in all the trials. The average tensile strength reported for the flux assisted laser weldments was found to be 587 MPa which was slightly lower than the parent metal. The impoverishment of tensile strength could be attributed to the formation of centerline equiaxed grains. Similarly the impact toughness of the joints was found to be 58 J. The studies demonstrated the possibility of using a 2 kW Nd:YAG laser welding machine to weld 5 mm thick plate with the use of SiO2 flux. A detailed study on the structure–property relationship of flux assisted Nd:YAG laser weldment was carried out using the combined techniques optical microscopy, scanning electron microscopy, and energy dispersive x-ray analysis.
Editor: New York, USA: Cambridge University Press
Idioma: Inglês

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Studies on the weldability, microstructure and mechanical properties of flux assisted Nd:YAG laser welds of AISI 904L

Devendranath Ramkumar, K. ; Chaitanya, Gangineni ; Narasimha Varma, Jelli Lakshmi ; Choudhary, Ayush ; Arivazhagan, N. ; Oyyaravelu, R.

New York, USA: Cambridge University Press

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