Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail

Fatigue crack nucleation and initiation at particles or defects in materials have been the interest of many researchers over the past years . This is because the understanding of theses phenomena would provide a better understanding of production of new fatigue resistanc e materials. In this study a...

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Main Author:	Ismail, Al Emran
Format:	Thesis
Language:	English
Published:	2003
Subjects:	TJ Mechanical engineering and machinery
Online Access:	https://ir.uitm.edu.my/id/eprint/27061/1/TM_AL%20EMRAN%20ISMAIL%20EM%2003_5.pdf
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id	my-uitm-ir.27061
record_format	uketd_dc
spelling	my-uitm-ir.270612022-08-18T06:34:25Z Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail 2003 Ismail, Al Emran TJ Mechanical engineering and machinery Mechanical devices and figures. Automata. Ingenious mechanisms.Robots (General) Fatigue crack nucleation and initiation at particles or defects in materials have been the interest of many researchers over the past years . This is because the understanding of theses phenomena would provide a better understanding of production of new fatigue resistanc e materials. In this study a test was developed to evaluate the fatigue properties and to observe fatigue crack nucleation and initiation in sintered steel. The fatigue test was carried out on polished specimens which was based on plate bending gives balanced biaxial tension. The experimental results shows that there were mixed mode of crack nucleation and initiation such that most cracks initiated at the interface of particles and matrix especially at high stress values . Cracks were also observed to initiate at voids and beneath the surface. Quenched specimens which were tempered between temperature range of 300°C and 600°C shows similar crack initiation mechanisms. The significant differenc e between as-rece ived and tempered specimens was that the number of cycles to fail due to di fferences in material hardne ss and internal defect s. The result s of the experimentation are discussed in the light of possible micro crack toughening at the crack tip and the presence of residual stresses due, to temperature changes. It is believed that some effects of residual stresses at the surface and beneath playa role in the nucleation of crack in sinter ed steel. 2003 Thesis https://ir.uitm.edu.my/id/eprint/27061/ https://ir.uitm.edu.my/id/eprint/27061/1/TM_AL%20EMRAN%20ISMAIL%20EM%2003_5.pdf text en public masters Universiti Teknologi MARA Faculty of Mechanical Engineering
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery TJ Mechanical engineering and machinery Ismail, Al Emran Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail
description	Fatigue crack nucleation and initiation at particles or defects in materials have been the interest of many researchers over the past years . This is because the understanding of theses phenomena would provide a better understanding of production of new fatigue resistanc e materials. In this study a test was developed to evaluate the fatigue properties and to observe fatigue crack nucleation and initiation in sintered steel. The fatigue test was carried out on polished specimens which was based on plate bending gives balanced biaxial tension. The experimental results shows that there were mixed mode of crack nucleation and initiation such that most cracks initiated at the interface of particles and matrix especially at high stress values . Cracks were also observed to initiate at voids and beneath the surface. Quenched specimens which were tempered between temperature range of 300°C and 600°C shows similar crack initiation mechanisms. The significant differenc e between as-rece ived and tempered specimens was that the number of cycles to fail due to di fferences in material hardne ss and internal defect s. The result s of the experimentation are discussed in the light of possible micro crack toughening at the crack tip and the presence of residual stresses due, to temperature changes. It is believed that some effects of residual stresses at the surface and beneath playa role in the nucleation of crack in sinter ed steel.
format	Thesis
qualification_level	Master's degree
author	Ismail, Al Emran
author_facet	Ismail, Al Emran
author_sort	Ismail, Al Emran
title	Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail
title_short	Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail
title_full	Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail
title_fullStr	Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail
title_full_unstemmed	Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail
title_sort	crack behavior of heat treated sintered steel under cyclic loading / al emran ismail
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Mechanical Engineering
publishDate	2003
url	https://ir.uitm.edu.my/id/eprint/27061/1/TM_AL%20EMRAN%20ISMAIL%20EM%2003_5.pdf
_version_	1783733922984624128

Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail

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