A comprehensive study on the effect of line energy during laser bending of duplex stainless steel

•Laser bending of duplex stainless steel is explored which is not reported in the literature.•Effect of line energy on bending mechanism, bend angle, edge effect, and mechanical properties is investigated in detail.•The role of temperature distribution on the variation in bend angle, and mechanical...

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Bibliographic Details
Published in:Optics and laser technology 2022-07, Vol.151, p.108025, Article 108025
Main Authors: Yadav, Ramsingh, Goyal, Dhruva Kumar, Kant, Ravi
Format: Article
Language:English
Subjects:
Bend properties
Bending
Ductility
Duplex stainless steels
Edge effect
Hardness
Laser bending
Lasers
Line energy
Mechanical properties
Micro-bending
Microstructural analysis
Sigma phase
Stainless steel
Temperature distribution
Thermo-mechanical simulation
Ultimate tensile strength
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Summary:•Laser bending of duplex stainless steel is explored which is not reported in the literature.•Effect of line energy on bending mechanism, bend angle, edge effect, and mechanical properties is investigated in detail.•The role of temperature distribution on the variation in bend angle, and mechanical and microstructural properties is explored. Laser bending is a well-established process to achieve bending with high accuracy and good controllability. This study discusses the effect of line energy on bending mechanism, bend angle, edge effect, mechanical properties, and microstructural characterization for laser bending of duplex stainless steel. Numerical simulations have been carried out for a better understanding of the bending mechanisms. Additionally, the role of temperature distribution at the bottom surface on the variation in bend angle has been analyzed. It is found that at low laser powers, the bend angle increases with line energy, but at a decreasing rate. Whereas at high laser powers, the bend angle increases with line energy; attains peak and then decreases. At constant line energy, the bend angle increases with the increase in laser power and scanning speed. The hardness of laser-scanned specimens is increased, and ductility is reduced. Besides, the ultimate strength and yield strength remain almost constant. The sigma phase formation has been observed during the microstructural analysis, which further correlates with the high hardness and low ductility.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2022.108025