Thermodynamic modeling of the Ti-Nb-Sn system and its preliminary applications in aging precipitation and solidification simulations

Peng, Yingbiao; Huang, Gongzhi; Long, Luping; Yan, Lianwu; Long, Jianzhan; He, Shiwen; Xu, Tao

doi:10.1088/2053-1591/abecac

Thermodynamic modeling of the Ti-Nb-Sn system and its preliminary applications in aging precipitation and solidification simulations

Journal Article · Fri Mar 26 00:00:00 UTC 2021 · Materials Research Express (Online)

DOI:https://doi.org/10.1088/2053-1591/abecac· OSTI ID:1833100

Peng, Yingbiao; Huang, Gongzhi; ; Yan, Lianwu; Long, Jianzhan; He, Shiwen; Xu, Tao

Abstract

Gasping the thermodynamic and phase diagram of the materials being studied is essential for further guiding the development process, like composition design, heat treatment optimization and so on. Nb and Sn are common alloying elements in Ti-based biomedical alloys. In this work, the Ti-Nb-Sn system has been thermodynamically assessed based on experimental phase equilibria. A self-consistent thermodynamic description for the Ti-Nb-Sn system including two ternary compounds Ti ₃ Nb ₃ Sn ₂ and Ti ₃ NbSn has been obtained. Based on the comparison between the calculated and experimental phase equilibria, the reliability of the presently obtained thermodynamic description has been verified. The influence of Nb and Sn contents on the precipitation temperature and amount of hcp α -Ti phase in bcc β -(Ti, Nb) has been investigated based on thermodynamic calculations. Results show that the increase of Nb or Sn content in Ti-based alloys would significantly reduce the precipitation amount and transformation temperature of hcp α -Ti phase in bcc β -(Ti, Nb) and the influence of Nb content is more effective than that of Sn. The solidified phases in several as-cast alloys have been thermodynamically predicted based on Scheil solidification simulations. The presently developed thermodynamic description of the Ti-Nb-Sn system can serve as a sub-ternary one in the thermodynamic database for multicomponent Ti-based biomedical alloys.

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Sponsoring Organization:: USDOE Office of Electricity (OE), Advanced Grid Research & Development. Power Systems Engineering Research

OSTI ID:: 1833100

Alternate ID(s):: OSTI ID: 23131206

Journal Information:: Materials Research Express (Online), Journal Name: Materials Research Express (Online) Journal Issue: 3 Vol. 8; ISSN 2053-1591

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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