The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition

Two oxide-dispersion-strengthened (ODS) steels with different compositions (14Cr-ODS and 14Cr-Zr-ODS) were investigated to reveal the influences of microalloying element addition on the microstructure and to clarify the refining mechanism of precipitated particles. TEM and HRTEM results indicated th...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Yingying, Zhang, Liye, Long, Dijun, Yu, Liming, Li, Huijun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8704420/
https://www.ncbi.nlm.nih.gov/pubmed/34947361
http://dx.doi.org/10.3390/ma14247767
_version_ 1784621703541817344
author Li, Yingying
Zhang, Liye
Long, Dijun
Yu, Liming
Li, Huijun
author_facet Li, Yingying
Zhang, Liye
Long, Dijun
Yu, Liming
Li, Huijun
author_sort Li, Yingying
collection PubMed
description Two oxide-dispersion-strengthened (ODS) steels with different compositions (14Cr-ODS and 14Cr-Zr-ODS) were investigated to reveal the influences of microalloying element addition on the microstructure and to clarify the refining mechanism of precipitated particles. TEM and HRTEM results indicated that precipitated particles in the Zr-containing ODS steel had finer sizes and dispersed more homogeneously within the grains. It was found that rhombohedral Y(4)Zr(3)O(12) particles with complex lattice structures were formed and could pin the migration of the grain boundaries during heat treatment due to their high thermal stability. In addition, the Zr-containing ODS steel exhibited a finer and more uniform grain morphology. Tensile tests showed that microalloying element addition could significantly improve the comprehensive mechanical properties of 14Cr ODS steels at room temperature.
format Online
Article
Text
id pubmed-8704420
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-87044202021-12-25 The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition Li, Yingying Zhang, Liye Long, Dijun Yu, Liming Li, Huijun Materials (Basel) Article Two oxide-dispersion-strengthened (ODS) steels with different compositions (14Cr-ODS and 14Cr-Zr-ODS) were investigated to reveal the influences of microalloying element addition on the microstructure and to clarify the refining mechanism of precipitated particles. TEM and HRTEM results indicated that precipitated particles in the Zr-containing ODS steel had finer sizes and dispersed more homogeneously within the grains. It was found that rhombohedral Y(4)Zr(3)O(12) particles with complex lattice structures were formed and could pin the migration of the grain boundaries during heat treatment due to their high thermal stability. In addition, the Zr-containing ODS steel exhibited a finer and more uniform grain morphology. Tensile tests showed that microalloying element addition could significantly improve the comprehensive mechanical properties of 14Cr ODS steels at room temperature. MDPI 2021-12-15 /pmc/articles/PMC8704420/ /pubmed/34947361 http://dx.doi.org/10.3390/ma14247767 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Yingying
Zhang, Liye
Long, Dijun
Yu, Liming
Li, Huijun
The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition
title The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition
title_full The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition
title_fullStr The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition
title_full_unstemmed The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition
title_short The Precipitated Particle Refinement in High-Cr ODS Steels by Microalloying Element Addition
title_sort precipitated particle refinement in high-cr ods steels by microalloying element addition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8704420/
https://www.ncbi.nlm.nih.gov/pubmed/34947361
http://dx.doi.org/10.3390/ma14247767
work_keys_str_mv AT liyingying theprecipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT zhangliye theprecipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT longdijun theprecipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT yuliming theprecipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT lihuijun theprecipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT liyingying precipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT zhangliye precipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT longdijun precipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT yuliming precipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition
AT lihuijun precipitatedparticlerefinementinhighcrodssteelsbymicroalloyingelementaddition

Ejemplares similares