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Title: Temperature effect of elastic anisotropy and internal strain development in advanced nanostructured alloys: An in-situ synchrotron X-ray investigation

Abstract

Nanostructured ferritic alloys (NFAs) are promising structural materials for advanced nuclear systems due to their exceptional radiation tolerance and high-temperature mechanical properties. Their remarkable properties result from the ultrafine ultrahigh density Y-Ti-O nanoclusters dispersed within the ferritic matrix. In this work, we performed in-situ synchrotron X-ray diffraction tests to study the tensile deformation process of the three types of NFAs: 9YWTV, 14YWT-sm13, and 14YWT-sm170 at both room temperature and elevated temperatures. A technique was developed, combining Kroner's model and X-ray measurement, to determine the intrinsic monocrystal elastic-stiffness constants, and polycrystal Young's modulus and Poisson's ratio of the NFAs. Temperature dependence of elastic anisotropy was observed in the NFAs. Lastly, an analysis of intergranular strain and strengthening factors determined that 14YWT-sm13 had a higher resistance to temperature softening compared to 9YWTV, attributed to the more effective nanoparticle strengthening during high-temperature mechanical loading.

Authors:
 [1];  [2];  [3];  [4];  [2];  [5];  [5];  [2];  [2];  [2];  [1]
  1. Clemson Univ., Clemson, SC (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Xi'an Jiaotong Univ., Xi'an (China)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
Work for Others (WFO); USDOE
OSTI Identifier:
1351786
Alternate Identifier(s):
OSTI ID: 1397427
Grant/Contract Number:
AC05-00OR22725; 13-5408; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 692; Journal Issue: C; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; oxide dispersion strengthened (ODS) alloy; nanostructure; deformation; in-situ tensile test; high-energy X-ray diffraction

Citation Formats

Gan, Yingye, Mo, Kun, Yun, Di, Hoelzer, David T., Miao, Yinbin, Liu, Xiang, Lan, Kuan -Che, Park, Jun -Sang, Almer, Jonathan, Chen, Tianyi, and Zhao, Huijuan. Temperature effect of elastic anisotropy and internal strain development in advanced nanostructured alloys: An in-situ synchrotron X-ray investigation. United States: N. p., 2017. Web. doi:10.1016/j.msea.2017.03.068.
Gan, Yingye, Mo, Kun, Yun, Di, Hoelzer, David T., Miao, Yinbin, Liu, Xiang, Lan, Kuan -Che, Park, Jun -Sang, Almer, Jonathan, Chen, Tianyi, & Zhao, Huijuan. Temperature effect of elastic anisotropy and internal strain development in advanced nanostructured alloys: An in-situ synchrotron X-ray investigation. United States. doi:10.1016/j.msea.2017.03.068.
Gan, Yingye, Mo, Kun, Yun, Di, Hoelzer, David T., Miao, Yinbin, Liu, Xiang, Lan, Kuan -Che, Park, Jun -Sang, Almer, Jonathan, Chen, Tianyi, and Zhao, Huijuan. Sun . "Temperature effect of elastic anisotropy and internal strain development in advanced nanostructured alloys: An in-situ synchrotron X-ray investigation". United States. doi:10.1016/j.msea.2017.03.068. https://www.osti.gov/servlets/purl/1351786.
@article{osti_1351786,
title = {Temperature effect of elastic anisotropy and internal strain development in advanced nanostructured alloys: An in-situ synchrotron X-ray investigation},
author = {Gan, Yingye and Mo, Kun and Yun, Di and Hoelzer, David T. and Miao, Yinbin and Liu, Xiang and Lan, Kuan -Che and Park, Jun -Sang and Almer, Jonathan and Chen, Tianyi and Zhao, Huijuan},
abstractNote = {Nanostructured ferritic alloys (NFAs) are promising structural materials for advanced nuclear systems due to their exceptional radiation tolerance and high-temperature mechanical properties. Their remarkable properties result from the ultrafine ultrahigh density Y-Ti-O nanoclusters dispersed within the ferritic matrix. In this work, we performed in-situ synchrotron X-ray diffraction tests to study the tensile deformation process of the three types of NFAs: 9YWTV, 14YWT-sm13, and 14YWT-sm170 at both room temperature and elevated temperatures. A technique was developed, combining Kroner's model and X-ray measurement, to determine the intrinsic monocrystal elastic-stiffness constants, and polycrystal Young's modulus and Poisson's ratio of the NFAs. Temperature dependence of elastic anisotropy was observed in the NFAs. Lastly, an analysis of intergranular strain and strengthening factors determined that 14YWT-sm13 had a higher resistance to temperature softening compared to 9YWTV, attributed to the more effective nanoparticle strengthening during high-temperature mechanical loading.},
doi = {10.1016/j.msea.2017.03.068},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = C,
volume = 692,
place = {United States},
year = {Sun Mar 19 00:00:00 EDT 2017},
month = {Sun Mar 19 00:00:00 EDT 2017}
}

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