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

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

37 Scopus citations

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 × 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.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Scripta Materialia
Volume	179
DOIs	https://doi.org/10.1016/j.scriptamat.2019.12.036
State	Published - 1 Apr 2020

Keywords

Creep resistance
Deformation mechanism
Nanocrystalline materials
Steels

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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 × 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.",

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

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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

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DO - 10.1016/j.scriptamat.2019.12.036

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VL - 179

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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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Keywords

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