High temperature creep resistance of a thermally stable nanocrystalline Fe-5 at.% Zr steel

G. B. Shan; Y. Z. Chen; Y. J. Li; C. Y. Zhang; H. Dong; Y. B. Cong; W. X. Zhang; L. K. Huang; T. Suo; F. Liu

doi:10.1016/j.scriptamat.2019.12.036

High temperature creep resistance of a thermally stable nanocrystalline Fe-5 at.% Zr steel

G. B. Shan
, Y. Z. Chen
, Y. J. Li
, C. Y. Zhang
, H. Dong
, Y. B. Cong
, W. X. Zhang
, L. K. Huang
, T. Suo
, F. Liu

Northwestern Polytechnical University Xian
Ruhr University Bochum

科研成果: 期刊稿件 › 文章 › 同行评审

41 引用（Scopus）

摘要

The application of nanocrystalline (NC) materials at high temperatures is challenging due to their poor thermal stability or low creep resistance. Here we report that a thermally stable NC Fe-5 at.% Zr steel produced by High-Pressure-Thermal-Compression sintering exhibits an excellent creep resistance (with a creep rate of 3.92 × 10⁻⁸ s⁻¹ at 923 K and under the applied stress of 250 MPa). The excellent creep resistance is ascribed to its highly stable NC structure stabilized by nano-sized precipitates. Mechanical testing suggests that the creep of the NC Fe-5 at.% Zr steel is controlled by dislocation activities rather than diffusion dominated mechanisms.

源语言	英语
页（从-至）	1-5
页数	5
期刊	Scripta Materialia
卷	179
DOI	https://doi.org/10.1016/j.scriptamat.2019.12.036
出版状态	已出版 - 1 4月 2020

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10.1016/j.scriptamat.2019.12.036

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abstract = "The application of nanocrystalline (NC) materials at high temperatures is challenging due to their poor thermal stability or low creep resistance. Here we report that a thermally stable NC Fe-5 at.\% Zr steel produced by High-Pressure-Thermal-Compression sintering exhibits an excellent creep resistance (with a creep rate of 3.92 {\texttimes} 10−8 s−1 at 923 K and under the applied stress of 250 MPa). The excellent creep resistance is ascribed to its highly stable NC structure stabilized by nano-sized precipitates. Mechanical testing suggests that the creep of the NC Fe-5 at.\% Zr steel is controlled by dislocation activities rather than diffusion dominated mechanisms.",

keywords = "Creep resistance, Deformation mechanism, Nanocrystalline materials, Steels",

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doi = "10.1016/j.scriptamat.2019.12.036",

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T1 - High temperature creep resistance of a thermally stable nanocrystalline Fe-5 at.% Zr steel

AU - Shan, G. B.

AU - Chen, Y. Z.

AU - Li, Y. J.

AU - Zhang, C. Y.

AU - Dong, H.

AU - Cong, Y. B.

AU - Zhang, W. X.

AU - Huang, L. K.

AU - Suo, T.

AU - Liu, F.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - The application of nanocrystalline (NC) materials at high temperatures is challenging due to their poor thermal stability or low creep resistance. Here we report that a thermally stable NC Fe-5 at.% Zr steel produced by High-Pressure-Thermal-Compression sintering exhibits an excellent creep resistance (with a creep rate of 3.92 × 10−8 s−1 at 923 K and under the applied stress of 250 MPa). The excellent creep resistance is ascribed to its highly stable NC structure stabilized by nano-sized precipitates. Mechanical testing suggests that the creep of the NC Fe-5 at.% Zr steel is controlled by dislocation activities rather than diffusion dominated mechanisms.

AB - The application of nanocrystalline (NC) materials at high temperatures is challenging due to their poor thermal stability or low creep resistance. Here we report that a thermally stable NC Fe-5 at.% Zr steel produced by High-Pressure-Thermal-Compression sintering exhibits an excellent creep resistance (with a creep rate of 3.92 × 10−8 s−1 at 923 K and under the applied stress of 250 MPa). The excellent creep resistance is ascribed to its highly stable NC structure stabilized by nano-sized precipitates. Mechanical testing suggests that the creep of the NC Fe-5 at.% Zr steel is controlled by dislocation activities rather than diffusion dominated mechanisms.

KW - Creep resistance

KW - Deformation mechanism

KW - Nanocrystalline materials

KW - Steels

UR - https://www.scopus.com/pages/publications/85077513033

U2 - 10.1016/j.scriptamat.2019.12.036

DO - 10.1016/j.scriptamat.2019.12.036

M3 - 文章

AN - SCOPUS:85077513033

SN - 1359-6462

VL - 179

SP - 1

EP - 5

JO - Scripta Materialia

JF - Scripta Materialia

ER -

High temperature creep resistance of a thermally stable nanocrystalline Fe-5 at.% Zr steel

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