Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels

Haokai Dong; Hao Chen; Ahmadreza Riyahi khorasgani; Boning Zhang; Yongjie Zhang; Zhenqiang Wang; Xiaosheng Zhou; Wei Wang; Sybrand van der Zwaag; null More Authors

doi:10.1016/j.actamat.2021.117475

Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels

Haokai Dong, Hao Chen^*, Ahmadreza Riyahi khorasgani, Boning Zhang, Yongjie Zhang, Zhenqiang Wang, Xiaosheng Zhou, Wei Wang, Sybrand van der Zwaag, More Authors

^*Corresponding author for this work

Novel Aerospace Materials

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Abstract

Mo is widely used as an effective microalloying element to improve mechanical performance of interphase precipitation steels, but the precise role of Mo in interphase precipitation behavior is not fully understood. In this contribution, interphase precipitation behavior in a series of Ti-Mo-bearing low carbon steels is systematically studied, and the role of Mo in interphase precipitates and its coarsening behavior is revisited. It is found that (Ti, Mo)C precipitates instead of TiC are formed in the Mo-containing alloys, and the average site fraction of Mo in (Ti, Mo)C is almost independent of the bulk Mo content. Moreover, the number density of interphase precipitates can be substantially enhanced by a minor addition of Mo, albeit it does not further rise with increasing the bulk Mo content. This is because the Mo fraction in (Ti, Mo)C rather than the bulk Mo content governs the driving force for precipitation nucleation and the interfacial energy of the (Ti, Mo)C/α and (Ti, Mo)C/γ interfaces. In addition to the reduced interfacial energy, decrease of Ti trans-interface diffusivity has been identified as another key reason for the enhanced carbide coarsening resistance in Mo-containing alloys.

Original language	English
Article number	117475
Journal	Acta Materialia
Volume	223
DOIs	https://doi.org/10.1016/j.actamat.2021.117475
Publication status	Published - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

(Ti, Mo)C
Carbide nucleation
Coarsening resistance
Interfacial energy
Interphase precipitation
Trans-interface diffusivity

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title = "Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels",

abstract = "Mo is widely used as an effective microalloying element to improve mechanical performance of interphase precipitation steels, but the precise role of Mo in interphase precipitation behavior is not fully understood. In this contribution, interphase precipitation behavior in a series of Ti-Mo-bearing low carbon steels is systematically studied, and the role of Mo in interphase precipitates and its coarsening behavior is revisited. It is found that (Ti, Mo)C precipitates instead of TiC are formed in the Mo-containing alloys, and the average site fraction of Mo in (Ti, Mo)C is almost independent of the bulk Mo content. Moreover, the number density of interphase precipitates can be substantially enhanced by a minor addition of Mo, albeit it does not further rise with increasing the bulk Mo content. This is because the Mo fraction in (Ti, Mo)C rather than the bulk Mo content governs the driving force for precipitation nucleation and the interfacial energy of the (Ti, Mo)C/α and (Ti, Mo)C/γ interfaces. In addition to the reduced interfacial energy, decrease of Ti trans-interface diffusivity has been identified as another key reason for the enhanced carbide coarsening resistance in Mo-containing alloys.",

keywords = "(Ti, Mo)C, Carbide nucleation, Coarsening resistance, Interfacial energy, Interphase precipitation, Trans-interface diffusivity",

author = "Haokai Dong and Hao Chen and {Riyahi khorasgani}, Ahmadreza and Boning Zhang and Yongjie Zhang and Zhenqiang Wang and Xiaosheng Zhou and Wei Wang and {van der Zwaag}, Sybrand and {More Authors}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ",

year = "2022",

doi = "10.1016/j.actamat.2021.117475",

language = "English",

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journal = "Acta Materialia",

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Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels. / Dong, Haokai; Chen, Hao; Riyahi khorasgani, Ahmadreza; Zhang, Boning; Zhang, Yongjie; Wang, Zhenqiang; Zhou, Xiaosheng; Wang, Wei; van der Zwaag, Sybrand; More Authors.

In: Acta Materialia, Vol. 223, 117475, 2022.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels

AU - Dong, Haokai

AU - Chen, Hao

AU - Riyahi khorasgani, Ahmadreza

AU - Zhang, Boning

AU - Zhang, Yongjie

AU - Wang, Zhenqiang

AU - Zhou, Xiaosheng

AU - Wang, Wei

AU - van der Zwaag, Sybrand

AU - More Authors, null

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2022

Y1 - 2022

N2 - Mo is widely used as an effective microalloying element to improve mechanical performance of interphase precipitation steels, but the precise role of Mo in interphase precipitation behavior is not fully understood. In this contribution, interphase precipitation behavior in a series of Ti-Mo-bearing low carbon steels is systematically studied, and the role of Mo in interphase precipitates and its coarsening behavior is revisited. It is found that (Ti, Mo)C precipitates instead of TiC are formed in the Mo-containing alloys, and the average site fraction of Mo in (Ti, Mo)C is almost independent of the bulk Mo content. Moreover, the number density of interphase precipitates can be substantially enhanced by a minor addition of Mo, albeit it does not further rise with increasing the bulk Mo content. This is because the Mo fraction in (Ti, Mo)C rather than the bulk Mo content governs the driving force for precipitation nucleation and the interfacial energy of the (Ti, Mo)C/α and (Ti, Mo)C/γ interfaces. In addition to the reduced interfacial energy, decrease of Ti trans-interface diffusivity has been identified as another key reason for the enhanced carbide coarsening resistance in Mo-containing alloys.

AB - Mo is widely used as an effective microalloying element to improve mechanical performance of interphase precipitation steels, but the precise role of Mo in interphase precipitation behavior is not fully understood. In this contribution, interphase precipitation behavior in a series of Ti-Mo-bearing low carbon steels is systematically studied, and the role of Mo in interphase precipitates and its coarsening behavior is revisited. It is found that (Ti, Mo)C precipitates instead of TiC are formed in the Mo-containing alloys, and the average site fraction of Mo in (Ti, Mo)C is almost independent of the bulk Mo content. Moreover, the number density of interphase precipitates can be substantially enhanced by a minor addition of Mo, albeit it does not further rise with increasing the bulk Mo content. This is because the Mo fraction in (Ti, Mo)C rather than the bulk Mo content governs the driving force for precipitation nucleation and the interfacial energy of the (Ti, Mo)C/α and (Ti, Mo)C/γ interfaces. In addition to the reduced interfacial energy, decrease of Ti trans-interface diffusivity has been identified as another key reason for the enhanced carbide coarsening resistance in Mo-containing alloys.

KW - (Ti, Mo)C

KW - Carbide nucleation

KW - Coarsening resistance

KW - Interfacial energy

KW - Interphase precipitation

KW - Trans-interface diffusivity

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DO - 10.1016/j.actamat.2021.117475

M3 - Article

AN - SCOPUS:85119454227

VL - 223

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

M1 - 117475

ER -

Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels

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