Two modes of grain boundary pinning by coherent precipitates

Nan Wang; Yanzhou Ji; Yongbiao Wang; Youhai Wen; Long Qing Chen

doi:10.1016/j.actamat.2017.06.031

Two modes of grain boundary pinning by coherent precipitates

Nan Wang^*, Yanzhou Ji, Yongbiao Wang, Youhai Wen, Long Qing Chen

^*Corresponding author for this work

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

54 Scopus citations

Abstract

We propose a two-mechanism theory to estimate the pinning effect of coherent precipitates on grain-boundary (GB) migration in grain growth, taking into account the important effect of elastic misfit strain at the coherent interface. Depending on the relative importance of the elastic and the GB contributions to the total free energy, Zener type stabilization or a novel elastic energy induced stabilization may occur. It is found that the pinning is most effective in the crossover region between these two mechanisms. A phase-field-crystal model is used to numerically validate the theory. Relevant experiments and potential impacts on alloy design are also discussed.

Original language	English
Pages (from-to)	226-232
Number of pages	7
Journal	Acta Materialia
Volume	135
DOIs	https://doi.org/10.1016/j.actamat.2017.06.031
State	Published - 15 Aug 2017
Externally published	Yes

Keywords

Coherent precipitate
Grain boundary
Grain growth
Particle pinning
Phase-field-crystal model

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10.1016/j.actamat.2017.06.031

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title = "Two modes of grain boundary pinning by coherent precipitates",

abstract = "We propose a two-mechanism theory to estimate the pinning effect of coherent precipitates on grain-boundary (GB) migration in grain growth, taking into account the important effect of elastic misfit strain at the coherent interface. Depending on the relative importance of the elastic and the GB contributions to the total free energy, Zener type stabilization or a novel elastic energy induced stabilization may occur. It is found that the pinning is most effective in the crossover region between these two mechanisms. A phase-field-crystal model is used to numerically validate the theory. Relevant experiments and potential impacts on alloy design are also discussed.",

keywords = "Coherent precipitate, Grain boundary, Grain growth, Particle pinning, Phase-field-crystal model",

author = "Nan Wang and Yanzhou Ji and Yongbiao Wang and Youhai Wen and Chen, {Long Qing}",

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doi = "10.1016/j.actamat.2017.06.031",

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TY - JOUR

T1 - Two modes of grain boundary pinning by coherent precipitates

AU - Wang, Nan

AU - Ji, Yanzhou

AU - Wang, Yongbiao

AU - Wen, Youhai

AU - Chen, Long Qing

PY - 2017/8/15

Y1 - 2017/8/15

N2 - We propose a two-mechanism theory to estimate the pinning effect of coherent precipitates on grain-boundary (GB) migration in grain growth, taking into account the important effect of elastic misfit strain at the coherent interface. Depending on the relative importance of the elastic and the GB contributions to the total free energy, Zener type stabilization or a novel elastic energy induced stabilization may occur. It is found that the pinning is most effective in the crossover region between these two mechanisms. A phase-field-crystal model is used to numerically validate the theory. Relevant experiments and potential impacts on alloy design are also discussed.

AB - We propose a two-mechanism theory to estimate the pinning effect of coherent precipitates on grain-boundary (GB) migration in grain growth, taking into account the important effect of elastic misfit strain at the coherent interface. Depending on the relative importance of the elastic and the GB contributions to the total free energy, Zener type stabilization or a novel elastic energy induced stabilization may occur. It is found that the pinning is most effective in the crossover region between these two mechanisms. A phase-field-crystal model is used to numerically validate the theory. Relevant experiments and potential impacts on alloy design are also discussed.

KW - Coherent precipitate

KW - Grain boundary

KW - Grain growth

KW - Particle pinning

KW - Phase-field-crystal model

UR - http://www.scopus.com/inward/record.url?scp=85021136556&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2017.06.031

DO - 10.1016/j.actamat.2017.06.031

M3 - 文章

AN - SCOPUS:85021136556

SN - 1359-6454

VL - 135

SP - 226

EP - 232

JO - Acta Materialia

JF - Acta Materialia

ER -

Two modes of grain boundary pinning by coherent precipitates

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Keywords

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