Investigation of microstructure and mechanical properties of Nd:YAG laser welded lean duplex stainless steel joints

This research investigates welding morphology, microstructure, tensile strength, hardness, ferrite ratio and fractograph of Nd:YAG laser welded lean duplex stainless steel joints. Effect of peak power (4.4–4.6kW), pulse duration (13–14ms), pulse frequency (6.5–7Hz) and speed (200–250mm/min) on tensi...

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Bibliographic Details
Published in:Optik (Stuttgart) 2017-02, Vol.131, p.1-10
Main Authors: G, Sivakumar, S, Saravanan, K, Raghukandan
Format: Article
Language:English
Subjects:
Laser welding
Lean duplex stainless steel
Response surface method
Tensile strength
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Summary:This research investigates welding morphology, microstructure, tensile strength, hardness, ferrite ratio and fractograph of Nd:YAG laser welded lean duplex stainless steel joints. Effect of peak power (4.4–4.6kW), pulse duration (13–14ms), pulse frequency (6.5–7Hz) and speed (200–250mm/min) on tensile strength is analysed using response surface methodology (RSM) based Box-Behnken design. Results show peak power and welding speed influence the joint strength significantly and laser welded LDSS joints have appreciable austenite-ferrite ratio and good joint strength.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2016.11.062