Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

The automotive field is continuously researching safer, high-strength, ductile materials. Nowadays, dual-phase (DP) steels are gaining importance, since they meet all these requirements. Dual-phase steel made of ferrite and bainite is the object of a complete microstructural and mechanical character...

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Autores principales:	Emilio Bassini, Antonio Sivo, Daniele Ugues
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dual-phase steel advanced high-strength steel cold rolling bainitic–ferritic steel Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/515b4e7b0e2d4de783e763f0d07fd0a4
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spelling	oai:doaj.org-article:515b4e7b0e2d4de783e763f0d07fd0a42021-11-11T18:10:37ZAssessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel10.3390/ma142166621996-1944https://doaj.org/article/515b4e7b0e2d4de783e763f0d07fd0a42021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6662https://doaj.org/toc/1996-1944The automotive field is continuously researching safer, high-strength, ductile materials. Nowadays, dual-phase (DP) steels are gaining importance, since they meet all these requirements. Dual-phase steel made of ferrite and bainite is the object of a complete microstructural and mechanical characterization, which includes tensile and bending tests. This specific steel contains ferrite and bainite in equal parts; ferrite is the soft phase while bainite acts as a dispersed reinforcing system. This peculiar microstructure, together with fine dispersed carbides, an extremely low carbon content (0.09 wt%), and a minimal degree of strain hardening (less than 10%) allow this steel to compete with traditional medium-carbon single-phase steels. In this work, a full pearlitic C67 steel containing 0.67% carbon was used as a benchmark to build a comparative study between the DP and SP steels. Moreover, the Crussard–Jaoul (C-J) and Voce analysis were adopted to describe the hardening behavior of the two materials. Using the C-J analysis, it is possible to separately analyze the ferrite and bainite strain hardening and understand which alterations occur to DP steel after being cold rolled. On the other hand, the Voce equation was used to evaluate the dislocation density evolution as a function of the material state.Emilio BassiniAntonio SivoDaniele UguesMDPI AGarticledual-phase steeladvanced high-strength steelcold rollingbainitic–ferritic steelTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6662, p 6662 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dual-phase steel advanced high-strength steel cold rolling bainitic–ferritic steel Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	dual-phase steel advanced high-strength steel cold rolling bainitic–ferritic steel Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Emilio Bassini Antonio Sivo Daniele Ugues Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel
description	The automotive field is continuously researching safer, high-strength, ductile materials. Nowadays, dual-phase (DP) steels are gaining importance, since they meet all these requirements. Dual-phase steel made of ferrite and bainite is the object of a complete microstructural and mechanical characterization, which includes tensile and bending tests. This specific steel contains ferrite and bainite in equal parts; ferrite is the soft phase while bainite acts as a dispersed reinforcing system. This peculiar microstructure, together with fine dispersed carbides, an extremely low carbon content (0.09 wt%), and a minimal degree of strain hardening (less than 10%) allow this steel to compete with traditional medium-carbon single-phase steels. In this work, a full pearlitic C67 steel containing 0.67% carbon was used as a benchmark to build a comparative study between the DP and SP steels. Moreover, the Crussard–Jaoul (C-J) and Voce analysis were adopted to describe the hardening behavior of the two materials. Using the C-J analysis, it is possible to separately analyze the ferrite and bainite strain hardening and understand which alterations occur to DP steel after being cold rolled. On the other hand, the Voce equation was used to evaluate the dislocation density evolution as a function of the material state.
format	article
author	Emilio Bassini Antonio Sivo Daniele Ugues
author_facet	Emilio Bassini Antonio Sivo Daniele Ugues
author_sort	Emilio Bassini
title	Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel
title_short	Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel
title_full	Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel
title_fullStr	Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel
title_full_unstemmed	Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel
title_sort	assessment of the hardening behavior and tensile properties of a cold-rolled bainitic–ferritic steel
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/515b4e7b0e2d4de783e763f0d07fd0a4
work_keys_str_mv	AT emiliobassini assessmentofthehardeningbehaviorandtensilepropertiesofacoldrolledbainiticferriticsteel AT antoniosivo assessmentofthehardeningbehaviorandtensilepropertiesofacoldrolledbainiticferriticsteel AT danieleugues assessmentofthehardeningbehaviorandtensilepropertiesofacoldrolledbainiticferriticsteel
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Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

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