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Title: Novel amorphous SiOC dispersion-strengthened austenitic steels.

Abstract

Here, a novel amorphous silicon oxycarbide dispersion-strengthened (SiOC-DS) austenitic steel has been fabricated via a powder metallurgy process. The microstructure of dispersion particles has been characterized by transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), revealing that amorphous SiOC nanoparticles with an average particle size of 30 nm were homogeneously distributed in the austenite grains with a sub-micrometer grain size. The high strength and hardness of SiOC-DS may be attributed to grain boundary strengthening, as well as dispersion strengthening via dislocation–particle interactions that were revealed by TEM investigations. In situ ion irradiation experiments showed that amorphous SiOC particles were stable after irradiation of 3.7 dpa, and the SiOC/steel interface can be an effective sink for the annihilation of irradiation defects. The excellent mechanical and irradiation properties of SiOC-DS austenitic steel make it a promising structural material for nuclear applications.

Authors:
 [1];  [1];  [2];  [3];  [4]
  1. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical & Materials Engineering
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
  3. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical & Materials Engineering, Nebraska Center for Energy Sciences Research, and Nebraska Center for Materials and Nanoscience
  4. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical & Materials Engineering and Nebraska Center for Materials and Nanoscience
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); USNRC; National Science Foundation (NSF); USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1650168
Alternate Identifier(s):
OSTI ID: 1547199
Report Number(s):
SAND-2020-8424J
Journal ID: ISSN 2589-1529; 689934
Grant/Contract Number:  
AC04-94AL85000; NA-0003525; 31310018M0045; ECCS-1542182; NE0008415
Resource Type:
Accepted Manuscript
Journal Name:
Materialia
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2589-1529
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SiOC; dispersion strengthening; stainless steel; irradiation

Citation Formats

Yan, Xueliang, Wang, Fei, Hattar, Khalid Mikhiel, Nastasi, Michael, and Cui, Bai. Novel amorphous SiOC dispersion-strengthened austenitic steels.. United States: N. p., 2019. Web. doi:10.1016/j.mtla.2019.100345.
Yan, Xueliang, Wang, Fei, Hattar, Khalid Mikhiel, Nastasi, Michael, & Cui, Bai. Novel amorphous SiOC dispersion-strengthened austenitic steels.. United States. https://doi.org/10.1016/j.mtla.2019.100345
Yan, Xueliang, Wang, Fei, Hattar, Khalid Mikhiel, Nastasi, Michael, and Cui, Bai. Thu . "Novel amorphous SiOC dispersion-strengthened austenitic steels.". United States. https://doi.org/10.1016/j.mtla.2019.100345. https://www.osti.gov/servlets/purl/1650168.
@article{osti_1650168,
title = {Novel amorphous SiOC dispersion-strengthened austenitic steels.},
author = {Yan, Xueliang and Wang, Fei and Hattar, Khalid Mikhiel and Nastasi, Michael and Cui, Bai},
abstractNote = {Here, a novel amorphous silicon oxycarbide dispersion-strengthened (SiOC-DS) austenitic steel has been fabricated via a powder metallurgy process. The microstructure of dispersion particles has been characterized by transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), revealing that amorphous SiOC nanoparticles with an average particle size of 30 nm were homogeneously distributed in the austenite grains with a sub-micrometer grain size. The high strength and hardness of SiOC-DS may be attributed to grain boundary strengthening, as well as dispersion strengthening via dislocation–particle interactions that were revealed by TEM investigations. In situ ion irradiation experiments showed that amorphous SiOC particles were stable after irradiation of 3.7 dpa, and the SiOC/steel interface can be an effective sink for the annihilation of irradiation defects. The excellent mechanical and irradiation properties of SiOC-DS austenitic steel make it a promising structural material for nuclear applications.},
doi = {10.1016/j.mtla.2019.100345},
journal = {Materialia},
number = ,
volume = 6,
place = {United States},
year = {Thu May 09 00:00:00 EDT 2019},
month = {Thu May 09 00:00:00 EDT 2019}
}

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