Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment

Low carbon steel has been extensively used in various industries, but its limited strength restricted the potential development in applications. In recent years, ultrafine grained (UFG) structural materials have been studied, because they are expected to provide superior mechanical properties. The p...

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Main Author:	Motham, Kanchana
Format:	Thesis
Language:	English
Published:	2018
Subjects:	T Technology
Online Access:	http://eprints.usm.my/56167/1/Microstructure%2C%20Mechanical%20Properties%2C%20And%20Corrosion%20Behavior%20Of%20Cryorolled%20Low%20Carbon%20Steel%20Subjected%20To%20Heat%20Treatment_Kanchana%20Motham.pdf
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spelling	my-usm-ep.561672022-12-30T04:42:39Z Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment 2018-12-01 Motham, Kanchana T Technology TN Mining Engineering. Metallurgy Low carbon steel has been extensively used in various industries, but its limited strength restricted the potential development in applications. In recent years, ultrafine grained (UFG) structural materials have been studied, because they are expected to provide superior mechanical properties. The present works aim at producing UFG in low carbon steel using cryorolling and investigated its effect on heat treatment and thickness reduction on microstructure, mechanical properties and corrosion behavior. The details of microstructural characteristics and mechanical properties of low carbon steel were investigated using optical microscope (OM), scanning electron microscope (SEM), electron back scattered diffraction (EBSD), X-ray diffraction (XRD), Vickers microhardness and tensile test. Low carbon steel underwent pre-annealing at 550°C, 750°C, and 900°C at 15, 30, 60 and 120 minutes followed by cryorolling. Sample treated at 550°C (60 minutes) shows the optimum properties and was chosen for futher investigation on different thickness reduction; 50%, 60%, 70%, 80% and 90%. The highest hardness and tensile strength attained at 90% reduction with the values of 208.5 Hv and 826.5 MPa respectively which result in the smallest crystallite size (38.16 nm) and highest lattice strain (20.58 x 10-4). Corrosion resistance decreases with thickness reduction. Post-annealed at 450°C shows recrystallization state for 90% reduction and achieved ultrafine grain with hardness and tensile strength of 157.9 Hv and 587.7 MPa respectively. 2018-12 Thesis http://eprints.usm.my/56167/ http://eprints.usm.my/56167/1/Microstructure%2C%20Mechanical%20Properties%2C%20And%20Corrosion%20Behavior%20Of%20Cryorolled%20Low%20Carbon%20Steel%20Subjected%20To%20Heat%20Treatment_Kanchana%20Motham.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Motham, Kanchana Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment
description	Low carbon steel has been extensively used in various industries, but its limited strength restricted the potential development in applications. In recent years, ultrafine grained (UFG) structural materials have been studied, because they are expected to provide superior mechanical properties. The present works aim at producing UFG in low carbon steel using cryorolling and investigated its effect on heat treatment and thickness reduction on microstructure, mechanical properties and corrosion behavior. The details of microstructural characteristics and mechanical properties of low carbon steel were investigated using optical microscope (OM), scanning electron microscope (SEM), electron back scattered diffraction (EBSD), X-ray diffraction (XRD), Vickers microhardness and tensile test. Low carbon steel underwent pre-annealing at 550°C, 750°C, and 900°C at 15, 30, 60 and 120 minutes followed by cryorolling. Sample treated at 550°C (60 minutes) shows the optimum properties and was chosen for futher investigation on different thickness reduction; 50%, 60%, 70%, 80% and 90%. The highest hardness and tensile strength attained at 90% reduction with the values of 208.5 Hv and 826.5 MPa respectively which result in the smallest crystallite size (38.16 nm) and highest lattice strain (20.58 x 10-4). Corrosion resistance decreases with thickness reduction. Post-annealed at 450°C shows recrystallization state for 90% reduction and achieved ultrafine grain with hardness and tensile strength of 157.9 Hv and 587.7 MPa respectively.
format	Thesis
qualification_level	Master's degree
author	Motham, Kanchana
author_facet	Motham, Kanchana
author_sort	Motham, Kanchana
title	Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment
title_short	Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment
title_full	Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment
title_fullStr	Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment
title_full_unstemmed	Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment
title_sort	microstructure, mechanical properties, and corrosion behavior of cryorolled low carbon steel subjected to heat treatment
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2018
url	http://eprints.usm.my/56167/1/Microstructure%2C%20Mechanical%20Properties%2C%20And%20Corrosion%20Behavior%20Of%20Cryorolled%20Low%20Carbon%20Steel%20Subjected%20To%20Heat%20Treatment_Kanchana%20Motham.pdf
_version_	1776101142977052672

Microstructure, Mechanical Properties, And Corrosion Behavior Of Cryorolled Low Carbon Steel Subjected To Heat Treatment

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