Design and Application of Novel Oxide Dispersion Strengthened (ODS) Alloys

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 2130

Special Issue Editors


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Guest Editor
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Interests: high performance steels; high damping materials and structures

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Guest Editor
School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Interests: material irradiation effect; corrosion and protection of nuclear materials; nano-material composite coating; superalloys

Special Issue Information

Dear Colleagues,

The increase in efficiency of nuclear reactors places structural materials in high demand as they can withstand the required harsh working conditions, such as high temperature oxidation, irradiation, and stress corrosion. Oxide dispersion strengthened (ODS) steels have potential for application as the structural materials of advanced nuclear reactors. Advances in the fabrication processes, microstructure characterization, and mechanical properties of ODS steels form the scope of this Special Issue. In terms of content suitability, there are no restrictions regarding the composition design of origin powders as we wish to encourage submissions on a range that reflects the diversities in the design of ODS steels. The fabrication processes of ODS steel are complicated, where different methods in the schedule will lead to a huge difference in the final microstructure. Based on this consideration, the new methods used in the fabrication processes of ODS steels are also of interest. For the finished products based on ODS steels, different experiments concerning service performance evaluation should be conducted to examine whether they can feasibly be used under real working conditions. Moreover, the concept of ODS is not restricted to Fe-based steels. Other alloys, such as nickel, aluminum, and cobalt alloys can be also considered for strengthening as an approach to optimize the overall performance of different materials.

For this Special Issue, we welcome articles that focus on the fabrication process, microstructure characterization, and mechanical properties of ODS alloys. Technology improvements, especially innovations that lead to improved mechanical properties of ODS alloys, for the production of high-performance ODS alloys are of particular interest.

Prof. Dr. Liming Yu
Prof. Dr. Peng Dou
Guest Editors

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Keywords

  • ODS alloys
  • microstructure characterization
  • mechanical properties
  • high temperature oxidation
  • irradiation
  • stress corrosion
  • nuclear reactors

Published Papers (1 paper)

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Research

9 pages, 2687 KiB  
Article
Effects of Zr Content on the Microstructure of FeCrAl ODS Steels
by Dijun Long, Yongduo Sun, Ruiqian Zhang, Shaoyu Qiu and Liming Yu
Metals 2022, 12(7), 1114; https://doi.org/10.3390/met12071114 - 29 Jun 2022
Cited by 2 | Viewed by 1430
Abstract
FeCrAl oxide dispersion strengthened (ODS) steels are an important kind of cladding material for accident-tolerant fuels. Their radiation resistance and mechanical properties are closely related to the grain size and dispersed second phases. In order to tailor the microstructure and provide an experimental [...] Read more.
FeCrAl oxide dispersion strengthened (ODS) steels are an important kind of cladding material for accident-tolerant fuels. Their radiation resistance and mechanical properties are closely related to the grain size and dispersed second phases. In order to tailor the microstructure and provide an experimental basis for the composition design of FeCrAl ODS steels, in this paper FeCrAl ODS steels with different Zr contents were prepared by mechanical alloying and the subsequent hot isostatic pressing (MA-HIP) process. The effects of Zr content on the grain size distribution and the precipitation of dispersed second phases in FeCrAl ODS steels were investigated by electron back-scattered diffraction (EBSD) and transmission electron microscopy (TEM). The results showed that the grain size decreased first and then increased as the Zr content increased, and that the average grain size achieved the minimum value of 2.092 μm when the Zr content was 0.6 wt.%. The Zr content had a negligible effect on the grain orientation of FeCrAl ODS steels, but the dispersed second phase changed from the Al2Y4O9 phase with monoclinic structure to the Y4Zr3O12 phase with hexagonal structure as the Zr content increased. Full article
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