Cargando…

Modeling Bainitic Transformations during Press Hardening

We revisit recent findings on experimental and modeling investigations of bainitic transformations under the influence of external stresses and pre-strain during the press hardening process. Experimentally, the transformation kinetics in 22MnB5 under various tensile stresses are studied both on the...

Descripción completa

Detalles Bibliográficos
Autores principales: Lin, Mingxuan, Zimmermann, Carina, Wang, Kai, Hunkel, Martin, Prahl, Ulrich, Spatschek, Robert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7867011/
https://www.ncbi.nlm.nih.gov/pubmed/33572594
http://dx.doi.org/10.3390/ma14030654
_version_ 1783648206548107264
author Lin, Mingxuan
Zimmermann, Carina
Wang, Kai
Hunkel, Martin
Prahl, Ulrich
Spatschek, Robert
author_facet Lin, Mingxuan
Zimmermann, Carina
Wang, Kai
Hunkel, Martin
Prahl, Ulrich
Spatschek, Robert
author_sort Lin, Mingxuan
collection PubMed
description We revisit recent findings on experimental and modeling investigations of bainitic transformations under the influence of external stresses and pre-strain during the press hardening process. Experimentally, the transformation kinetics in 22MnB5 under various tensile stresses are studied both on the macroscopic and microstructural level. In the bainitic microstructure, the variant selection effect is analyzed with an optimized prior-austenite grain reconstruction technique. The resulting observations are expressed phenomenologically using a autocatalytic transformation model, which serves for further scale bridging descriptions of the underlying thermo-chemo-mechanical coupling processes during the bainitic transformation. Using analyses of orientation relationships, thermodynamically consistent and nondiagonal phase field models are developed, which are supported by ab initio generated mechanical parameters. Applications are related to the microstructure evolution on the sheaf, subunit, precipitate and grain boundary level.
format Online
Article
Text
id pubmed-7867011
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-78670112021-02-07 Modeling Bainitic Transformations during Press Hardening Lin, Mingxuan Zimmermann, Carina Wang, Kai Hunkel, Martin Prahl, Ulrich Spatschek, Robert Materials (Basel) Article We revisit recent findings on experimental and modeling investigations of bainitic transformations under the influence of external stresses and pre-strain during the press hardening process. Experimentally, the transformation kinetics in 22MnB5 under various tensile stresses are studied both on the macroscopic and microstructural level. In the bainitic microstructure, the variant selection effect is analyzed with an optimized prior-austenite grain reconstruction technique. The resulting observations are expressed phenomenologically using a autocatalytic transformation model, which serves for further scale bridging descriptions of the underlying thermo-chemo-mechanical coupling processes during the bainitic transformation. Using analyses of orientation relationships, thermodynamically consistent and nondiagonal phase field models are developed, which are supported by ab initio generated mechanical parameters. Applications are related to the microstructure evolution on the sheaf, subunit, precipitate and grain boundary level. MDPI 2021-01-31 /pmc/articles/PMC7867011/ /pubmed/33572594 http://dx.doi.org/10.3390/ma14030654 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lin, Mingxuan
Zimmermann, Carina
Wang, Kai
Hunkel, Martin
Prahl, Ulrich
Spatschek, Robert
Modeling Bainitic Transformations during Press Hardening
title Modeling Bainitic Transformations during Press Hardening
title_full Modeling Bainitic Transformations during Press Hardening
title_fullStr Modeling Bainitic Transformations during Press Hardening
title_full_unstemmed Modeling Bainitic Transformations during Press Hardening
title_short Modeling Bainitic Transformations during Press Hardening
title_sort modeling bainitic transformations during press hardening
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7867011/
https://www.ncbi.nlm.nih.gov/pubmed/33572594
http://dx.doi.org/10.3390/ma14030654
work_keys_str_mv AT linmingxuan modelingbainitictransformationsduringpresshardening
AT zimmermanncarina modelingbainitictransformationsduringpresshardening
AT wangkai modelingbainitictransformationsduringpresshardening
AT hunkelmartin modelingbainitictransformationsduringpresshardening
AT prahlulrich modelingbainitictransformationsduringpresshardening
AT spatschekrobert modelingbainitictransformationsduringpresshardening