Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application

It has been proven that through targeted quenching and partitioning (Q & P), medium manganese steels can exhibit excellent mechanical properties combining very high strength and ductility. In order to apply the potential of these steels in industrial press hardening and to avoid high scrap rates...

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Autores principales:	Charline Blankart, Sebastian Wesselmecking, Ulrich Krupp
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	medium manganese steel quenching and partitioning dilatometry martensitic phase transformation press hardening Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/0709c43aa6fc4f92a4096ff040c08b5a
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spelling	oai:doaj.org-article:0709c43aa6fc4f92a4096ff040c08b5a2021-11-25T18:22:36ZInfluence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application10.3390/met111118792075-4701https://doaj.org/article/0709c43aa6fc4f92a4096ff040c08b5a2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1879https://doaj.org/toc/2075-4701It has been proven that through targeted quenching and partitioning (Q & P), medium manganese steels can exhibit excellent mechanical properties combining very high strength and ductility. In order to apply the potential of these steels in industrial press hardening and to avoid high scrap rates, it is of utmost importance to determine a robust process window for Q & P. Hence, an intensive study of dilatometry experiments was carried out to identify the influence of quenching temperature (<i>T<sub>Q</sub></i>) and partitioning time (t<sub>p</sub>) on phase transformations, phase stabilities, and the mechanical properties of a lean medium manganese steel. For this purpose, additional scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and energy dispersive X-ray spectroscopy (EDX) examinations as well as tensile testing were performed. Based on the dilatometry data, an adjustment of the Koistinen–Marburger (K-M) equation for medium manganese steel was developed. The results show that a retained austenite content of 12–21% in combination with a low-phase fraction of untempered secondary martensite (max. 20%) leads to excellent mechanical properties with a tensile strength higher than 1500 MPa and a total elongation of 18%, whereas an exceeding secondary martensite phase fraction results in brittle failure. The optimum retained austenite content was adjusted for <i>T<sub>Q</sub></i> between 130 °C and 150 °C by means of an adapted partitioning.Charline BlankartSebastian WesselmeckingUlrich KruppMDPI AGarticlemedium manganese steelquenching and partitioningdilatometrymartensitic phase transformationpress hardeningMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1879, p 1879 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	medium manganese steel quenching and partitioning dilatometry martensitic phase transformation press hardening Mining engineering. Metallurgy TN1-997
spellingShingle	medium manganese steel quenching and partitioning dilatometry martensitic phase transformation press hardening Mining engineering. Metallurgy TN1-997 Charline Blankart Sebastian Wesselmecking Ulrich Krupp Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application
description	It has been proven that through targeted quenching and partitioning (Q & P), medium manganese steels can exhibit excellent mechanical properties combining very high strength and ductility. In order to apply the potential of these steels in industrial press hardening and to avoid high scrap rates, it is of utmost importance to determine a robust process window for Q & P. Hence, an intensive study of dilatometry experiments was carried out to identify the influence of quenching temperature (<i>T<sub>Q</sub></i>) and partitioning time (t<sub>p</sub>) on phase transformations, phase stabilities, and the mechanical properties of a lean medium manganese steel. For this purpose, additional scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and energy dispersive X-ray spectroscopy (EDX) examinations as well as tensile testing were performed. Based on the dilatometry data, an adjustment of the Koistinen–Marburger (K-M) equation for medium manganese steel was developed. The results show that a retained austenite content of 12–21% in combination with a low-phase fraction of untempered secondary martensite (max. 20%) leads to excellent mechanical properties with a tensile strength higher than 1500 MPa and a total elongation of 18%, whereas an exceeding secondary martensite phase fraction results in brittle failure. The optimum retained austenite content was adjusted for <i>T<sub>Q</sub></i> between 130 °C and 150 °C by means of an adapted partitioning.
format	article
author	Charline Blankart Sebastian Wesselmecking Ulrich Krupp
author_facet	Charline Blankart Sebastian Wesselmecking Ulrich Krupp
author_sort	Charline Blankart
title	Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application
title_short	Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application
title_full	Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application
title_fullStr	Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application
title_full_unstemmed	Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application
title_sort	influence of quenching and partitioning parameters on phase transformations and mechanical properties of medium manganese steel for press-hardening application
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0709c43aa6fc4f92a4096ff040c08b5a
work_keys_str_mv	AT charlineblankart influenceofquenchingandpartitioningparametersonphasetransformationsandmechanicalpropertiesofmediummanganesesteelforpresshardeningapplication AT sebastianwesselmecking influenceofquenchingandpartitioningparametersonphasetransformationsandmechanicalpropertiesofmediummanganesesteelforpresshardeningapplication AT ulrichkrupp influenceofquenchingandpartitioningparametersonphasetransformationsandmechanicalpropertiesofmediummanganesesteelforpresshardeningapplication
_version_	1718411239125680128

Influence of Quenching and Partitioning Parameters on Phase Transformations and Mechanical Properties of Medium Manganese Steel for Press-Hardening Application

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