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  Journal Paper


Paper Title :
Effect of Grain Size Deformation on Laser Processed Sheet Steel under High Temperature

Author :Stephen A. Akinlabi, Madindwa P. Mashinini, Olawale O. Fatoba, Esther T. Akinlabi

Article Citation :Stephen A. Akinlabi ,Madindwa P. Mashinini ,Olawale O. Fatoba ,Esther T. Akinlabi , (2018 ) " Effect of Grain Size Deformation on Laser Processed Sheet Steel under High Temperature " , International Journal of Mechanical and Production Engineering (IJMPE) , pp. 23-28, Volume-6,Issue-2

Abstract : Laser material processing is a novel technique employed to process and deform plates and sheets metals such as steels, aluminium, magnesium and titanium, with the uniqueness of high thermal expansion coefficient. This technique has large applications in shipbuilding, automotive and aerospace industries. Laser beam forming is a rapid heating and cooling process that evolve with unique microstructures at different processing conditions. However, processing at high temperature may be desirable depending on the application and ability to control the process. The crystal structure of low carbon steel is a body-centered cubic (BCC) structure whereby little percentage carbon content can dissolve in ferrite at room temperature. Upon heating, the Body Centre Cubic (BCC) ferrite transforms to Face Centre Cubic (FCC) austenite at 912oC. These crystal structures impart different properties to the steel material. Improving the strength and mechanical properties of materials i s achieved by processing it to bring about the desired deformation and further refine the grain structures. The heat treatment processes improve the strength further. This study report on the effects of grain sizes on the deformation of laser formed sheet steel. The result revealed that the grain sizes measured at the LBF sample 24 were refined at about 38% when compared with the parent material while a grain refinement of 2% for LBF sample 9. Index Terms - Deformation, Grain size, Laser Material Processing and Microstructure.

Type : Research paper

Published : Volume-6,Issue-2


DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-11249   View Here

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