ω-Assisted α nucleation in a metastable β titanium alloy

Shi, Rongpei; Zheng, Yufeng; Banerjee, Rajarshi; Fraser, Hamish L.; Wang, Yunzhi

doi:10.1016/j.scriptamat.2019.06.020

Title: ω-Assisted α nucleation in a metastable β titanium alloy

Abstract

Here, we explore mechanisms of ω-assisted α nucleation for microstructure refinement in a metastable β titanium alloy, Ti-20V (wt%). In particular, we analyze quantitatively the individual and combined effects of concentration and stress fields associated with a growing isothermal ω precipitate and the potency of the ω/β interface on the activation energy barrier for α nucleation as a function of the ω precipitate size and coherency state. We find that the complex interplay among these three factors determines the most potent ω particle size for inducing α nucleation and the most favorable nucleation site.

Authors:

Shi, Rongpei ^[1]; Zheng, Yufeng ^[2]; Banerjee, Rajarshi ^[3]; Fraser, Hamish L. ^[2]; Wang, Yunzhi ^[2]

The Ohio State Univ., Columbus, OH (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
The Ohio State Univ., Columbus, OH (United States)
Univ. of North Texas, Denton, TX (United States)

Publication Date:: Fri Jun 28 00:00:00 EDT 2019

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)

OSTI Identifier:: 1562370

Report Number(s):: LLNL-JRNL-774022
Journal ID: ISSN 1359-6462; 966476; TRN: US2000689

Grant/Contract Number:: AC52-07NA27344; DMR-1309270; DMR-1435483

Resource Type:: Accepted Manuscript

Journal Name:: Scripta Materialia

Additional Journal Information:: Journal Volume: 171; Journal Issue: C; Journal ID: ISSN 1359-6462

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Heterogeneous nucleation; Interphase interface; Precipitation; Phase-field simulation; High resolution scanning transmission electron microscopy

Citation Formats


                    Shi, Rongpei, Zheng, Yufeng, Banerjee, Rajarshi, Fraser, Hamish L., and Wang, Yunzhi. ω-Assisted α nucleation in a metastable β titanium alloy.  United States: N. p., 2019. 
Web.  doi:10.1016/j.scriptamat.2019.06.020.

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                    Shi, Rongpei, Zheng, Yufeng, Banerjee, Rajarshi, Fraser, Hamish L., & Wang, Yunzhi. ω-Assisted α nucleation in a metastable β titanium alloy.  United States.  https://doi.org/10.1016/j.scriptamat.2019.06.020

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                    Shi, Rongpei, Zheng, Yufeng, Banerjee, Rajarshi, Fraser, Hamish L., and Wang, Yunzhi. Fri .  
"ω-Assisted α nucleation in a metastable β titanium alloy".  United States.  https://doi.org/10.1016/j.scriptamat.2019.06.020.  https://www.osti.gov/servlets/purl/1562370.

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@article{osti_1562370,

  title        = {ω-Assisted α nucleation in a metastable β titanium alloy},

  author       = {Shi, Rongpei and Zheng, Yufeng and Banerjee, Rajarshi and Fraser, Hamish L. and Wang, Yunzhi},

  abstractNote = {Here, we explore mechanisms of ω-assisted α nucleation for microstructure refinement in a metastable β titanium alloy, Ti-20V (wt%). In particular, we analyze quantitatively the individual and combined effects of concentration and stress fields associated with a growing isothermal ω precipitate and the potency of the ω/β interface on the activation energy barrier for α nucleation as a function of the ω precipitate size and coherency state. We find that the complex interplay among these three factors determines the most potent ω particle size for inducing α nucleation and the most favorable nucleation site.},

  doi          = {10.1016/j.scriptamat.2019.06.020},

  journal      = {Scripta Materialia},

  number       = C,

  volume       = 171,

  place        = {United States},

  year         = {Fri Jun 28 00:00:00 EDT 2019},

  month        = {Fri Jun 28 00:00:00 EDT 2019}

}

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Journal Article:

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https://doi.org/10.1016/j.scriptamat.2019.06.020

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Cited by: 26 works

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Figures / Tables:

Fig. 1: Variation of the chemical driving forces for α nucleation as a function of V concentration in the β matrix at 375°C.

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Supplementary Figure 1 (p. 19)

Supplementary Figure 2 (p. 20)

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