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Investigation of surface integrity in laser-assisted turning of AISI 4340 hardened steel: Finite element simulation with experimental verification

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dc.contributor.author Khatir, Farzad Ahmadi
dc.contributor.author Sadeghi, Mohammad Hossein
dc.contributor.author Akar, Samet
dc.date.accessioned 2022-05-27T12:51:56Z
dc.date.available 2022-05-27T12:51:56Z
dc.date.issued 2022-03
dc.identifier.citation Khatir, Farzad Ahmadi; Sadeghi, Mohammad Hossein; Akar, Samet (2022). "Investigation of surface integrity in laser-assisted turning of AISI 4340 hardened steel: Finite element simulation with experimental verification", Optics and Laser Technology, Vol. 147. tr_TR
dc.identifier.issn 0030-3992
dc.identifier.uri http://hdl.handle.net/20.500.12416/5595
dc.description.abstract This study investigates the laser-assisted turning (LAT) of AISI 4340 hardened steel (∼52 HRC). Despite the various advantages of this process for machining hard materials, the issues related to the machined surface integrity remain the most important challenge. The laser heating used in this process substantially affects the surface integrity characteristics of the workpiece and its mechanical properties. Therefore, it is important to understand, predict, and optimize the workpiece's heat effects at various regions. Due to the complexity of the process, experimental investigations alone cannot reveal thorough information of various phenomena involved. Therefore, a reliable finite element model has been developed to predict the effect of various process input parameters on the metallurgical changes of the machined workpieces. Since general-purpose finite element codes cannot predict the phenomena of interest, three user-defined subroutines have been developed to capture surface integrity parameters such as heat-affected zone, hardness variations of the machined surface, and white layer formation. The developed FE model consists of three parts: mechanical model, thermal model, and coupled thermo-mechanical model. The results of the FE models are verified with experimental data, and a good agreement has been observed. The effect of various process parameters on the surface integrity characteristics of the workpiece has been studied in detail. It has been observed that the laser scanning speed, laser power, and undeformed chip thickness have the most significant influence on the metallurgical effects on the workpiece, respectively. © 2021 tr_TR
dc.language.iso eng tr_TR
dc.relation.isversionof 10.1016/j.optlastec.2021.107623 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject AISI 4340 tr_TR
dc.subject Finite Element Analysis tr_TR
dc.subject Laser-Assisted Turning tr_TR
dc.subject Surface Integrity tr_TR
dc.title Investigation of surface integrity in laser-assisted turning of AISI 4340 hardened steel: Finite element simulation with experimental verification tr_TR
dc.type article tr_TR
dc.relation.journal Optics and Laser Technology tr_TR
dc.contributor.authorID 315516 tr_TR
dc.identifier.volume 147 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü tr_TR


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