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:
Online Access:http://ir.uitm.edu.my/id/eprint/27061/
http://ir.uitm.edu.my/id/eprint/27061/1/TM_AL%20EMRAN%20ISMAIL%20EM%2003_5.pdf
id uitm-27061
recordtype eprints
spelling uitm-270612020-01-06T01:44:19Z http://ir.uitm.edu.my/id/eprint/27061/ Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail 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 NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/27061/1/TM_AL%20EMRAN%20ISMAIL%20EM%2003_5.pdf Ismail, Al Emran (2003) Crack behavior of heat treated sintered steel under cyclic loading / Al Emran Ismail. Masters thesis, Universiti Teknologi MARA.
repository_type Digital Repository
institution_category Local University
institution Universiti Teknologi MARA
building UiTM Institutional Repository
collection Online Access
language English
topic TJ Mechanical engineering and machinery
Mechanical devices and figures. Automata. Ingenious mechanisms.Robots (General)
spellingShingle TJ Mechanical engineering and machinery
Mechanical devices and figures. Automata. Ingenious mechanisms.Robots (General)
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
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
publishDate 2003
url http://ir.uitm.edu.my/id/eprint/27061/
http://ir.uitm.edu.my/id/eprint/27061/1/TM_AL%20EMRAN%20ISMAIL%20EM%2003_5.pdf
first_indexed 2023-09-18T23:17:41Z
last_indexed 2023-09-18T23:17:41Z
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