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The relationship between case depth and bending fatigue strength of gas carburized SAE 8620 steel

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dc.contributor.author Asi, Osman.
dc.contributor.author Can, A.Ç.
dc.contributor.author Pineault, J.
dc.contributor.author Belassel, M.
dc.date.accessioned 2019-08-16T11:33:15Z
dc.date.available 2019-08-16T11:33:15Z
dc.date.issued 2007
dc.identifier.issn 0257-8972
dc.identifier.uri https://hdl.handle.net/11499/4297
dc.identifier.uri https://doi.org/10.1016/j.surfcoat.2006.11.006
dc.description.abstract The fatigue performance of gas carburized SAE 8620 steel was evaluated as a function of case depth. To vary the case depths, different carburizing times were applied. The typical times were: 45 min, 3 and 5 h at the temperature of 940 °C. To cause failure in the rotating bending fatigue specimens, the applied load was chosen as the equivalent load at 106 cycles for the material when is subjected to bending fatigue. The characterization of the specimens was carried out using X-ray diffraction technique for stress measurement and retained austenite and optical metallographic examination. The fractured surfaces were cleaned in an ultrasonic bath and examined using scanning electron microscope (SEM) equipped with EDX to evaluate the crack initiation and growth characteristics of the materials in the core and carburized case regions of specimens. The results showed that the fatigue limit was associated with the microstructure, the case depth, the distribution of retained austenite, the depth of the internal oxidation and the compressive residual stresses near the surface. The bending fatigue strength of gas carburized specimens was showed to decrease with the increasing case depths caused by the increasing of internal oxidation and nonmartensitic transformation present at the surface. © 2006 Elsevier B.V. All rights reserved. en_US
dc.language.iso en en_US
dc.relation.ispartof Surface and Coatings Technology en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.subject Bending fatigue strength en_US
dc.subject Case depth en_US
dc.subject Gas carburizing en_US
dc.subject Internal oxidation en_US
dc.subject Austenite en_US
dc.subject Bending (deformation) en_US
dc.subject Carburizing en_US
dc.subject Compressive stress en_US
dc.subject Crack initiation en_US
dc.subject Crack propagation en_US
dc.subject Fatigue of materials en_US
dc.subject Metallographic microstructure en_US
dc.subject Residual stresses en_US
dc.subject Stress analysis en_US
dc.subject Steel en_US
dc.title The relationship between case depth and bending fatigue strength of gas carburized SAE 8620 steel en_US
dc.type Article en_US
dc.identifier.volume 201 en_US
dc.identifier.issue 12 en_US
dc.identifier.startpage 5979
dc.identifier.startpage 5979 en_US
dc.identifier.endpage 5987 en_US
dc.authorid 0000000320966075
dc.identifier.doi 10.1016/j.surfcoat.2006.11.006
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.identifier.scopus 2-s2.0-33846644086 en_US
dc.identifier.wos WOS:000244578100035 en_US

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