A thermo-kinetic correlation for grain growth in nanocrystalline alloys

H. R. Peng; L. K. Huang; F. Liu

doi:10.1016/j.matlet.2018.02.114

A thermo-kinetic correlation for grain growth in nanocrystalline alloys

H. R. Peng, L. K. Huang, F. Liu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

35 Scopus citations

Abstract

The thermo-kinetic stabilization that incorporates mixed effects of grain boundary (GB) energy and activation energy for GB migration has shown enormous advantages in describing thermal stability of nanocrystalline materials. However, its underlying physics is still unclear due to the lack of proofs that the two effects coexist and act together to impact on grain growth. In this work, a thermo-kinetic correlation is derived to bridge GB energy and activation energy in nanocrystalline alloys. Meanwhile, molecular dynamic simulations are performed to determine the two parameters in Al-based systems. The results shows that upon GB segregation, the GB energy is reduced in contrast with the increased activation energy. This analytically suggests a thermo-kinetic origin for stabilization due to GB segregation, other than pure thermodynamic or kinetic sources.

Original language	English
Pages (from-to)	276-279
Number of pages	4
Journal	Materials Letters
Volume	219
DOIs	https://doi.org/10.1016/j.matlet.2018.02.114
State	Published - 15 May 2018

Keywords

Activation energy
Correlation
Grain boundary energy
Segregation

Access to Document

10.1016/j.matlet.2018.02.114

Cite this

@article{aa6188f2510a4d4d8534767ca913b2f6,

title = "A thermo-kinetic correlation for grain growth in nanocrystalline alloys",

abstract = "The thermo-kinetic stabilization that incorporates mixed effects of grain boundary (GB) energy and activation energy for GB migration has shown enormous advantages in describing thermal stability of nanocrystalline materials. However, its underlying physics is still unclear due to the lack of proofs that the two effects coexist and act together to impact on grain growth. In this work, a thermo-kinetic correlation is derived to bridge GB energy and activation energy in nanocrystalline alloys. Meanwhile, molecular dynamic simulations are performed to determine the two parameters in Al-based systems. The results shows that upon GB segregation, the GB energy is reduced in contrast with the increased activation energy. This analytically suggests a thermo-kinetic origin for stabilization due to GB segregation, other than pure thermodynamic or kinetic sources.",

keywords = "Activation energy, Correlation, Grain boundary energy, Segregation",

author = "Peng, {H. R.} and Huang, {L. K.} and F. Liu",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = may,

day = "15",

doi = "10.1016/j.matlet.2018.02.114",

language = "英语",

volume = "219",

pages = "276--279",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - A thermo-kinetic correlation for grain growth in nanocrystalline alloys

AU - Peng, H. R.

AU - Huang, L. K.

AU - Liu, F.

PY - 2018/5/15

Y1 - 2018/5/15

N2 - The thermo-kinetic stabilization that incorporates mixed effects of grain boundary (GB) energy and activation energy for GB migration has shown enormous advantages in describing thermal stability of nanocrystalline materials. However, its underlying physics is still unclear due to the lack of proofs that the two effects coexist and act together to impact on grain growth. In this work, a thermo-kinetic correlation is derived to bridge GB energy and activation energy in nanocrystalline alloys. Meanwhile, molecular dynamic simulations are performed to determine the two parameters in Al-based systems. The results shows that upon GB segregation, the GB energy is reduced in contrast with the increased activation energy. This analytically suggests a thermo-kinetic origin for stabilization due to GB segregation, other than pure thermodynamic or kinetic sources.

AB - The thermo-kinetic stabilization that incorporates mixed effects of grain boundary (GB) energy and activation energy for GB migration has shown enormous advantages in describing thermal stability of nanocrystalline materials. However, its underlying physics is still unclear due to the lack of proofs that the two effects coexist and act together to impact on grain growth. In this work, a thermo-kinetic correlation is derived to bridge GB energy and activation energy in nanocrystalline alloys. Meanwhile, molecular dynamic simulations are performed to determine the two parameters in Al-based systems. The results shows that upon GB segregation, the GB energy is reduced in contrast with the increased activation energy. This analytically suggests a thermo-kinetic origin for stabilization due to GB segregation, other than pure thermodynamic or kinetic sources.

KW - Activation energy

KW - Correlation

KW - Grain boundary energy

KW - Segregation

UR - http://www.scopus.com/inward/record.url?scp=85042699900&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2018.02.114

DO - 10.1016/j.matlet.2018.02.114

M3 - 文章

AN - SCOPUS:85042699900

SN - 0167-577X

VL - 219

SP - 276

EP - 279

JO - Materials Letters

JF - Materials Letters

ER -

A thermo-kinetic correlation for grain growth in nanocrystalline alloys

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this