Laser welding of 3 mm thick laser-cut AISI 304 stainless steel sheet |
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Authors: | Harish Kumar P Ganesh Rakesh Kaul B Tirumala Rao Pragya Tiwari A K Nath Ranjeet Brajpuriya S M Chaudhari |
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Affiliation: | (1) Industrial CO2 Laser Section, Synchrotron Utilization Division, Centre for Advanced Technology, P.O.: CAT, 452 013 Indore, India;(2) University Grants Commission-Department of Atomic Energy Consortium for Scientific Research, 452 017 Indore, India |
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Abstract: | The objective of the present work was to study the laser weldability of laser-cut 3 mm thick AISI 304 austenitic stainless
steel sheet (using oxygen as an assist gas). For minimizing heat input during laser cutting, which is an important factor
influencing the thickness of the oxide layer on the cut surface, laser cutting was performed in pulsed mode. The results of
the study demonstrated that although the laser welding of laser-cut specimens did not result in the formation of weld defects,
the resultant laser weldments exhibited reduced ductility with respect to base metal and bead-on-plate laser weldments. Laser-cut
and laser-welded specimens also displayed higher notch sensitivity than the base metal. However, laser-cut and laser-welded
specimens still possessed enough ductility to pass guided bend tests. |
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Keywords: | austenitic stainless steel CO2 laser laser cutting laser welding |
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