Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing

Metastable austenitic stainless steels are distinguished by their susceptibility to the Transformation Induced Plasticity (TRIP) effect, where austenite (γ) to martensite (α’- and/or ε) transformation is triggered mechanically. They present an optimal relationship between mechanical and physical pro...

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Detalles Bibliográficos
Autor: Sucarrats i Olius, Raimon
Tipo de recurso: tesis de maestría
Fecha de publicación:2020
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/341156
Acceso en línea:https://hdl.handle.net/2117/341156
Access Level:acceso abierto
Palabra clave:Austenitic stainless steel
Matter -- Properties
Materials -- Mechanical properties
Grinding
Metastable austenitic stainless steel
Acer inoxidable austenític
Matèria -- Propietats
Materials -- Propietats mecàniques
Àrees temàtiques de la UPC::Enginyeria dels materials
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spelling Characterization of the surface modification of a Metastable Stainless Steel induced by Ground PolishingSucarrats i Olius, RaimonAustenitic stainless steelMatter -- PropertiesMaterials -- Mechanical propertiesGrindingMetastable austenitic stainless steelAcer inoxidable austeníticMatèria -- PropietatsMaterials -- Propietats mecàniquesÀrees temàtiques de la UPC::Enginyeria dels materialsMetastable austenitic stainless steels are distinguished by their susceptibility to the Transformation Induced Plasticity (TRIP) effect, where austenite (γ) to martensite (α’- and/or ε) transformation is triggered mechanically. They present an optimal relationship between mechanical and physical properties. Surface modification of TRIP steels, and particulaly an AISI 301LN metastable austenitic stainless steel specimens, was performed in order to study the possibility of enhancing their tribological and mechanical properties, by means of a parametric ground polishing analysis, used as a Surface Mechanical Modification Technique. To the best knowledge of the author, this technique has not been studied yet for this application, according to the performed literature review. Microstructural and mechanical properties are studied with the help of advanced characterisation techniques, e.g. Field-Emission Scanning Electron Microscopy (FESEM), Focus Ion Beam (FIB), etc. Experimental results demonstrate that an increase in grinding abrasion induces phase transformation and nano-structuring of the materials’ subsurface, by generation of compressive residual stresses, which contribute to an increase in the overall hardness of the material, which has been noticeable up to the micro-range. In addition, a qualitative analysis of the tribological images obtained leads to demonstrating an evolution in the surface deformation mechanisms, from shear bands to mechanisms related to the grain boundary rotation, as the grinding treatment intensifies. The path opened by this investigation could allow future studies to focus on a more exhaustive analysis of the benefits produced by this surface modification technique, by studying wear rates, the evolution of the friction coefficient and also the fatigue properties.Universitat Politècnica de CatalunyaRoa Rovira, Joan JosepMateo García, Antonio Manuel20202020-10-1420212021-03-08master thesishttp://purl.org/coar/resource_type/c_bdccNAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/masterThesisapplication/pdfhttps://hdl.handle.net/2117/341156reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 3.0 Spainhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3411562026-05-27T15:37:01Z
dc.title.none.fl_str_mv Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
title Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
spellingShingle Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
Sucarrats i Olius, Raimon
Austenitic stainless steel
Matter -- Properties
Materials -- Mechanical properties
Grinding
Metastable austenitic stainless steel
Acer inoxidable austenític
Matèria -- Propietats
Materials -- Propietats mecàniques
Àrees temàtiques de la UPC::Enginyeria dels materials
title_short Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
title_full Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
title_fullStr Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
title_full_unstemmed Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
title_sort Characterization of the surface modification of a Metastable Stainless Steel induced by Ground Polishing
dc.creator.none.fl_str_mv Sucarrats i Olius, Raimon
author Sucarrats i Olius, Raimon
author_facet Sucarrats i Olius, Raimon
author_role author
dc.contributor.none.fl_str_mv Roa Rovira, Joan Josep
Mateo García, Antonio Manuel
dc.subject.none.fl_str_mv Austenitic stainless steel
Matter -- Properties
Materials -- Mechanical properties
Grinding
Metastable austenitic stainless steel
Acer inoxidable austenític
Matèria -- Propietats
Materials -- Propietats mecàniques
Àrees temàtiques de la UPC::Enginyeria dels materials
topic Austenitic stainless steel
Matter -- Properties
Materials -- Mechanical properties
Grinding
Metastable austenitic stainless steel
Acer inoxidable austenític
Matèria -- Propietats
Materials -- Propietats mecàniques
Àrees temàtiques de la UPC::Enginyeria dels materials
description Metastable austenitic stainless steels are distinguished by their susceptibility to the Transformation Induced Plasticity (TRIP) effect, where austenite (γ) to martensite (α’- and/or ε) transformation is triggered mechanically. They present an optimal relationship between mechanical and physical properties. Surface modification of TRIP steels, and particulaly an AISI 301LN metastable austenitic stainless steel specimens, was performed in order to study the possibility of enhancing their tribological and mechanical properties, by means of a parametric ground polishing analysis, used as a Surface Mechanical Modification Technique. To the best knowledge of the author, this technique has not been studied yet for this application, according to the performed literature review. Microstructural and mechanical properties are studied with the help of advanced characterisation techniques, e.g. Field-Emission Scanning Electron Microscopy (FESEM), Focus Ion Beam (FIB), etc. Experimental results demonstrate that an increase in grinding abrasion induces phase transformation and nano-structuring of the materials’ subsurface, by generation of compressive residual stresses, which contribute to an increase in the overall hardness of the material, which has been noticeable up to the micro-range. In addition, a qualitative analysis of the tribological images obtained leads to demonstrating an evolution in the surface deformation mechanisms, from shear bands to mechanisms related to the grain boundary rotation, as the grinding treatment intensifies. The path opened by this investigation could allow future studies to focus on a more exhaustive analysis of the benefits produced by this surface modification technique, by studying wear rates, the evolution of the friction coefficient and also the fatigue properties.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-10-14
2021
2021-03-08
dc.type.none.fl_str_mv master thesis
http://purl.org/coar/resource_type/c_bdcc
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/341156
url https://hdl.handle.net/2117/341156
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat Politècnica de Catalunya
publisher.none.fl_str_mv Universitat Politècnica de Catalunya
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869411078946947072
score 15.300724

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