In situ synchrotron tensile investigations on 14YWT, MA957, and 9-Cr ODS alloys

Jun Li Lin; Kun Mo; Di Yun; Yinbin Miao; Xiang Liu; Huijuan Zhao; David T. Hoelzer; Jun Sang Park; Jonathan Almer; Guangming Zhang; Zhangjian Zhou; James F. Stubbins; Abdellatif M. Yacout

doi:10.1016/j.jnucmat.2015.10.049

In situ synchrotron tensile investigations on 14YWT, MA957, and 9-Cr ODS alloys

Jun Li Lin, Kun Mo, Di Yun, Yinbin Miao, Xiang Liu, Huijuan Zhao, David T. Hoelzer, Jun Sang Park, Jonathan Almer, Guangming Zhang, Zhangjian Zhou, James F. Stubbins, Abdellatif M. Yacout

Alloy Behavior & Design

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

24 Scopus citations

Abstract

Advanced ODS alloys provide exceptional radiation tolerance and high-temperature mechanical properties when compared to traditional ferritic and ferritic/martensitic (F/M) steels. Their remarkable properties result from ultrahigh density and ultrafine size of Y-Ti-O nanoclusters within the ferritic matrix. In this work, we applied a high-energy synchrotron radiation X-ray to study the deformation process of three advanced ODS materials including 14YWT, MA957, and 9-Cr ODS steel. Only the relatively large nanoparticles in the 9-Cr ODS were observed in the synchrotron X-ray diffraction. The nanoclusters in both 14YWT and MA957 were invisible in the measurement due to their non-stoichiometric nature. Due to the different sizes of nanoparticles and nanoclusters in the materials, the Orowan looping was considered to be the major strengthening mechanism in the 9-Cr ODS, while the dispersed-barrier-hardening is dominant strengthening mechanism in both 14YWT and MA957, This analysis was inferred from the different build-up rates of dislocation density when plastic deformation was initiated. Finally, the dislocation densities interpreted from the X-ray measurements were successfully modeled using the Bergström's dislocation models.

Original language	English
Pages (from-to)	289-298
Number of pages	10
Journal	Journal of Nuclear Materials
Volume	471
DOIs	https://doi.org/10.1016/j.jnucmat.2015.10.049
State	Published - Apr 1 2016

Funding

This work was supported by the Department of Energy, NEUP program under Award Number 13-5408. Argonne National Laboratory's work was supported by the U.S. Department of Energy under Contract No. DE-AC-02-06CH11357 between UChicago Argonne, LLC and the Department of Energy. The author(s) gratefully acknowledge the support of the International Institute for Carbon Neutral Energy Research (WPI–I2CNER), sponsored by the World Premier International Research Center Initiative (WPI), MEXT, Japan.

Funders	Funder number
U.S. Department of Energy	DE-AC02-06CH11357
Nuclear Energy University Program	13-5408
Ministry of Education, Culture, Sports, Science and Technology
International Institute for Carbon-Neutral Energy Research, Kyushu University	WPI–I2CNER

Keywords

Advanced ODS alloys
Deformation
Dislocation density
High-energy X-ray diffraction
In-situ tensile test

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10.1016/j.jnucmat.2015.10.049

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title = "In situ synchrotron tensile investigations on 14YWT, MA957, and 9-Cr ODS alloys",

abstract = "Advanced ODS alloys provide exceptional radiation tolerance and high-temperature mechanical properties when compared to traditional ferritic and ferritic/martensitic (F/M) steels. Their remarkable properties result from ultrahigh density and ultrafine size of Y-Ti-O nanoclusters within the ferritic matrix. In this work, we applied a high-energy synchrotron radiation X-ray to study the deformation process of three advanced ODS materials including 14YWT, MA957, and 9-Cr ODS steel. Only the relatively large nanoparticles in the 9-Cr ODS were observed in the synchrotron X-ray diffraction. The nanoclusters in both 14YWT and MA957 were invisible in the measurement due to their non-stoichiometric nature. Due to the different sizes of nanoparticles and nanoclusters in the materials, the Orowan looping was considered to be the major strengthening mechanism in the 9-Cr ODS, while the dispersed-barrier-hardening is dominant strengthening mechanism in both 14YWT and MA957, This analysis was inferred from the different build-up rates of dislocation density when plastic deformation was initiated. Finally, the dislocation densities interpreted from the X-ray measurements were successfully modeled using the Bergstr{\"o}m's dislocation models.",

keywords = "Advanced ODS alloys, Deformation, Dislocation density, High-energy X-ray diffraction, In-situ tensile test",

author = "Lin, {Jun Li} and Kun Mo and Di Yun and Yinbin Miao and Xiang Liu and Huijuan Zhao and Hoelzer, {David T.} and Park, {Jun Sang} and Jonathan Almer and Guangming Zhang and Zhangjian Zhou and Stubbins, {James F.} and Yacout, {Abdellatif M.}",

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doi = "10.1016/j.jnucmat.2015.10.049",

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AU - Lin, Jun Li

AU - Mo, Kun

AU - Yun, Di

AU - Miao, Yinbin

AU - Liu, Xiang

AU - Zhao, Huijuan

AU - Hoelzer, David T.

AU - Park, Jun Sang

AU - Almer, Jonathan

AU - Zhang, Guangming

AU - Zhou, Zhangjian

AU - Stubbins, James F.

AU - Yacout, Abdellatif M.

PY - 2016/4/1

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N2 - Advanced ODS alloys provide exceptional radiation tolerance and high-temperature mechanical properties when compared to traditional ferritic and ferritic/martensitic (F/M) steels. Their remarkable properties result from ultrahigh density and ultrafine size of Y-Ti-O nanoclusters within the ferritic matrix. In this work, we applied a high-energy synchrotron radiation X-ray to study the deformation process of three advanced ODS materials including 14YWT, MA957, and 9-Cr ODS steel. Only the relatively large nanoparticles in the 9-Cr ODS were observed in the synchrotron X-ray diffraction. The nanoclusters in both 14YWT and MA957 were invisible in the measurement due to their non-stoichiometric nature. Due to the different sizes of nanoparticles and nanoclusters in the materials, the Orowan looping was considered to be the major strengthening mechanism in the 9-Cr ODS, while the dispersed-barrier-hardening is dominant strengthening mechanism in both 14YWT and MA957, This analysis was inferred from the different build-up rates of dislocation density when plastic deformation was initiated. Finally, the dislocation densities interpreted from the X-ray measurements were successfully modeled using the Bergström's dislocation models.

AB - Advanced ODS alloys provide exceptional radiation tolerance and high-temperature mechanical properties when compared to traditional ferritic and ferritic/martensitic (F/M) steels. Their remarkable properties result from ultrahigh density and ultrafine size of Y-Ti-O nanoclusters within the ferritic matrix. In this work, we applied a high-energy synchrotron radiation X-ray to study the deformation process of three advanced ODS materials including 14YWT, MA957, and 9-Cr ODS steel. Only the relatively large nanoparticles in the 9-Cr ODS were observed in the synchrotron X-ray diffraction. The nanoclusters in both 14YWT and MA957 were invisible in the measurement due to their non-stoichiometric nature. Due to the different sizes of nanoparticles and nanoclusters in the materials, the Orowan looping was considered to be the major strengthening mechanism in the 9-Cr ODS, while the dispersed-barrier-hardening is dominant strengthening mechanism in both 14YWT and MA957, This analysis was inferred from the different build-up rates of dislocation density when plastic deformation was initiated. Finally, the dislocation densities interpreted from the X-ray measurements were successfully modeled using the Bergström's dislocation models.

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In situ synchrotron tensile investigations on 14YWT, MA957, and 9-Cr ODS alloys

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Keywords

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