Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel
High-boron steel 304B7 has been selected as International Thermonuclear Experimental Reactor vacuum vessel in-wall shielding material. Due to the brittle fracture issues of high-boron steel, there are still many challenges to overcome in engineering-scale production. Based on the preparation process...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/adf900 |
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| author | Benxian Song Xiang Geng Chunyi Xie Haiyang Fu Jing Wang Weijun Wang Qiang Qi Hai-Shan Zhou Guang-Nan Luo |
| author_facet | Benxian Song Xiang Geng Chunyi Xie Haiyang Fu Jing Wang Weijun Wang Qiang Qi Hai-Shan Zhou Guang-Nan Luo |
| author_sort | Benxian Song |
| collection | DOAJ |
| description | High-boron steel 304B7 has been selected as International Thermonuclear Experimental Reactor vacuum vessel in-wall shielding material. Due to the brittle fracture issues of high-boron steel, there are still many challenges to overcome in engineering-scale production. Based on the preparation process of engineering applications, it is necessary to explore the material preparation of hot isostatic pressing (HIP) and melting-casting. In this study, sample 304B7-A was prepared by HIP, and sample 304B7-B was prepared by melting-casting. The research focuses on the morphology of precipitation and the evolution of matrix texture, analyzing their relation to the macro-mechanical properties of high-boron steel. This study comprehensively analyzes the results of Vickers hardness, tensile test, scanning electron microscope, and electron backscatter diffraction. The findings indicate that the phases of 304B7-A are finer and more dispersed, resulting in a synergistic effect of grain refinement and grain boundary pinning, which significantly enhances the mechanical properties. Texture analysis reveals that during plastic deformation, γ -Fe grains rotate towards the {110}<111> ∥ loading direction, and the {110}<001> texture is effectively retained in the samples. These findings provide theoretical foundations for optimizing high-boron steel’s mechanical properties, and make great significance for expanding its engineering applications in the nuclear industry. |
| format | Article |
| id | doaj-art-a9c9b5cc32fe45ac93af2e2c18b2de36 |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-a9c9b5cc32fe45ac93af2e2c18b2de362025-08-20T09:29:04ZengIOP PublishingNuclear Fusion0029-55152025-01-0165909602310.1088/1741-4326/adf900Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steelBenxian Song0https://orcid.org/0009-0000-1401-4268Xiang Geng1Chunyi Xie2Haiyang Fu3Jing Wang4https://orcid.org/0000-0001-7346-8286Weijun Wang5https://orcid.org/0000-0003-1463-6483Qiang Qi6https://orcid.org/0009-0004-7707-4048Hai-Shan Zhou7https://orcid.org/0000-0001-9773-8121Guang-Nan Luo8https://orcid.org/0000-0001-6924-7843Institute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaHefei Technology College , Hefei, Anhui 238000, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaSchool of Materials Science and Engineering, Hefei University of Technology , Hefei 230009, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, China; Institute of Energy, Hefei Comprehensive National Science Center , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, China; Institute of Energy, Hefei Comprehensive National Science Center , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences , Hefei 230031, ChinaHigh-boron steel 304B7 has been selected as International Thermonuclear Experimental Reactor vacuum vessel in-wall shielding material. Due to the brittle fracture issues of high-boron steel, there are still many challenges to overcome in engineering-scale production. Based on the preparation process of engineering applications, it is necessary to explore the material preparation of hot isostatic pressing (HIP) and melting-casting. In this study, sample 304B7-A was prepared by HIP, and sample 304B7-B was prepared by melting-casting. The research focuses on the morphology of precipitation and the evolution of matrix texture, analyzing their relation to the macro-mechanical properties of high-boron steel. This study comprehensively analyzes the results of Vickers hardness, tensile test, scanning electron microscope, and electron backscatter diffraction. The findings indicate that the phases of 304B7-A are finer and more dispersed, resulting in a synergistic effect of grain refinement and grain boundary pinning, which significantly enhances the mechanical properties. Texture analysis reveals that during plastic deformation, γ -Fe grains rotate towards the {110}<111> ∥ loading direction, and the {110}<001> texture is effectively retained in the samples. These findings provide theoretical foundations for optimizing high-boron steel’s mechanical properties, and make great significance for expanding its engineering applications in the nuclear industry.https://doi.org/10.1088/1741-4326/adf900high-boron steelpreparation methodsmechanical propertiesprecipitationtextureneutron shielding |
| spellingShingle | Benxian Song Xiang Geng Chunyi Xie Haiyang Fu Jing Wang Weijun Wang Qiang Qi Hai-Shan Zhou Guang-Nan Luo Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel Nuclear Fusion high-boron steel preparation methods mechanical properties precipitation texture neutron shielding |
| title | Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel |
| title_full | Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel |
| title_fullStr | Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel |
| title_full_unstemmed | Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel |
| title_short | Effects of precipitation morphology and matrix texture on mechanical performance for high-boron steel |
| title_sort | effects of precipitation morphology and matrix texture on mechanical performance for high boron steel |
| topic | high-boron steel preparation methods mechanical properties precipitation texture neutron shielding |
| url | https://doi.org/10.1088/1741-4326/adf900 |
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