Influence of Interface Proximity on Precipitation Thermodynamics
The formation of coherent precipitates is often accompanied by large elastic mismatch stresses, which suppress phase separation. We discuss the presence of interfaces as a mechanism for stress relaxation, which can lead to preferred zones of precipitation. In particular, we discuss the proximity of...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/10/1292 |
| _version_ | 1797552509821124608 |
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| author | Kai Wang Marc Weikamp Mingxuan Lin Carina Zimmermann Ruth Schwaiger Ulrich Prahl Martin Hunkel Robert Spatschek |
| author_facet | Kai Wang Marc Weikamp Mingxuan Lin Carina Zimmermann Ruth Schwaiger Ulrich Prahl Martin Hunkel Robert Spatschek |
| author_sort | Kai Wang |
| collection | DOAJ |
| description | The formation of coherent precipitates is often accompanied by large elastic mismatch stresses, which suppress phase separation. We discuss the presence of interfaces as a mechanism for stress relaxation, which can lead to preferred zones of precipitation. In particular, we discuss the proximity of free surfaces and shear-coupled grain boundaries, for which we can obtain a substantial local energy reduction and predict the influence on the local precipitation thermodynamics. The latter case is accompanied by morphological changes of the grain boundary, which are less suitable for large-scale descriptions. For that purpose, we develop an effective description through an elastic softening inside the grain boundary and map the microscopic grain boundary relaxation to a mesoscopic elastic and phase field model, which also allows generalizing the description to multi-phase situations. |
| first_indexed | 2024-03-10T16:01:08Z |
| format | Article |
| id | doaj.art-cbfc425bc8a84590bcdf5a630f45dce8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T16:01:08Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-cbfc425bc8a84590bcdf5a630f45dce82023-11-20T15:15:59ZengMDPI AGMetals2075-47012020-09-011010129210.3390/met10101292Influence of Interface Proximity on Precipitation ThermodynamicsKai Wang0Marc Weikamp1Mingxuan Lin2Carina Zimmermann3Ruth Schwaiger4Ulrich Prahl5Martin Hunkel6Robert Spatschek7Institut für Energie- und Klimaforschung IEK-2, Forschungszentrum Jülich GmbH, 52428 Jülich, GermanyInstitut für Energie- und Klimaforschung IEK-2, Forschungszentrum Jülich GmbH, 52428 Jülich, GermanySteel Institute, RWTH Aachen University, 52062 Aachen, GermanyLeibniz-Institut für Werkstofforientierte Technologien—IWT, 28359 Bremen, GermanyInstitut für Energie- und Klimaforschung IEK-2, Forschungszentrum Jülich GmbH, 52428 Jülich, GermanyInstitut für Metallformung, Technische Universität Bergakademie Freiberg, 09599 Freiberg, GermanyLeibniz-Institut für Werkstofforientierte Technologien—IWT, 28359 Bremen, GermanyInstitut für Energie- und Klimaforschung IEK-2, Forschungszentrum Jülich GmbH, 52428 Jülich, GermanyThe formation of coherent precipitates is often accompanied by large elastic mismatch stresses, which suppress phase separation. We discuss the presence of interfaces as a mechanism for stress relaxation, which can lead to preferred zones of precipitation. In particular, we discuss the proximity of free surfaces and shear-coupled grain boundaries, for which we can obtain a substantial local energy reduction and predict the influence on the local precipitation thermodynamics. The latter case is accompanied by morphological changes of the grain boundary, which are less suitable for large-scale descriptions. For that purpose, we develop an effective description through an elastic softening inside the grain boundary and map the microscopic grain boundary relaxation to a mesoscopic elastic and phase field model, which also allows generalizing the description to multi-phase situations.https://www.mdpi.com/2075-4701/10/10/1292precipitationinterfacesgrain boundariesbainite |
| spellingShingle | Kai Wang Marc Weikamp Mingxuan Lin Carina Zimmermann Ruth Schwaiger Ulrich Prahl Martin Hunkel Robert Spatschek Influence of Interface Proximity on Precipitation Thermodynamics Metals precipitation interfaces grain boundaries bainite |
| title | Influence of Interface Proximity on Precipitation Thermodynamics |
| title_full | Influence of Interface Proximity on Precipitation Thermodynamics |
| title_fullStr | Influence of Interface Proximity on Precipitation Thermodynamics |
| title_full_unstemmed | Influence of Interface Proximity on Precipitation Thermodynamics |
| title_short | Influence of Interface Proximity on Precipitation Thermodynamics |
| title_sort | influence of interface proximity on precipitation thermodynamics |
| topic | precipitation interfaces grain boundaries bainite |
| url | https://www.mdpi.com/2075-4701/10/10/1292 |
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