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Optimizing pulsed Nd: YAG laser welding of high-Mn TWIP steel using response surface methodology technique
Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran.
Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran.
Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran.
Department of Nanotechnology Engineering, Faculty of Advanced Sciences and Technologies University of Isfahan, Isfahan, Iran.
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2019 (English)In: Optics and Laser Technology, ISSN 0030-3992, E-ISSN 1879-2545, Vol. 120, article id 105721Article in journal (Refereed) Published
Abstract [en]

In the present study, the microstructural and mechanical properties of laser beam-welded thin sheet twinning-induced plasticity (TWIP) steel were investigated. The pulsed neodymium: yttrium-aluminum-garnet (Nd: YAG) laser beam welding process parameters were modeled and optimized based on experimental data and statistical analysis using response surface methodology (RSM) technique. Process parameters range, i.e. the power input (2000–3000 W), welding speed (0.2–1 mm/min), and spot size (0.3–0.7 mm) were selected properly in order to obtain the desired mechanical properties. Main effects of each factor along with interaction effect with other factors were determined quantitatively. The predicted and actual values of the mechanical properties compared using analysis of variance (ANOVA) in order to verify the adequacy of the developed model. Optimal laser beam welding parameters were identified as the power input, welding speed and spot size of 2586 W, 0.53 mm/min, and 0.48 mm, respectively. Using parameters in the optimal conditions, a welding joint with tensile load of 2001 N (% 94 strength of the base metal) was obtained. In addition, the welding zone with an average grain size coarser than the one for the base metal and a random texture was identified.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 120, article id 105721
Keywords [en]
Pulsed Nd: YAG laser welding, Twinning-induced plasticity (TWIP) steel, Response surface methodology (RSM), Optimization
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-45493DOI: 10.1016/j.optlastec.2019.105721Scopus ID: 2-s2.0-85070098714Local ID: ;JTHMaterialISOAI: oai:DiVA.org:hj-45493DiVA, id: diva2:1341241
Available from: 2019-08-08 Created: 2019-08-08 Last updated: 2019-08-19Bibliographically approved

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Ghassemali, Ehsan

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