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Transfer from M3B2 boride to BN nitride in 9Cr3W3CoB martensitic heat-resistant steel
Liang, Ye1,2; Yan, Wei1,3; Shi, Xianbo1,3; Li, Yanfen1,3; Wang, Wei1,3; Shi, Quanqiang1,3; Shan, Yiyin1,3; Yang, Ke1,3
Corresponding AuthorYan, Wei(weiyan@imr.ac.cn) ; Yang, Ke(kyang@imr.ac.cn)
2021-07-01
Source PublicationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN2238-7854
Volume13Pages:513-523
AbstractBoron is generally added into heat-resistant steel to improve the creep strength. The existence of M3B2 borides and BN nitrides should be avoided due to the consumption of effective B. Before eliminating the harmful borides, it is important to elucidate their thermodynamic behavior during aging. Therefore, the formation of BN nitride in a 9Cr3W3CoB steel during high temperature aging was investigated. It was found that majority of B was presented as M3B2 borides in the as-treated steel. Due to the low content of N and the existence of M3B2 borides, only a few BN nitrides were distributed along PAGBs. Metastable M3B2 borides would gradually dissolve during isothermal exposure and then lead to the precipitation of BN nitride, which has been verified by employing thermo-mechanical treatment (TMT) to eliminate M3B2 borides. It was revealed under scanning electron microscopy (SEM) that BN could not precipitate during high temperature aging in the TMT sample without M3B2 borides. The nucleation and growth of BN nitride was thermodynamic processes affected by both aging time and temperature. Its number density and size increased with increasing aging temperature. During aging at 800 degrees C, BN nitride nucleated quickly and the shape evolved from subsphaeroidal to irregular even with sharp corners. Unfortunately, the BN particles with sharp corners were detrimental to toughness. (C) 2021 The Authors. Published by Elsevier B.V.
KeywordM3B2 BN Aging Precipitation Morphology
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China
DOI10.1016/j.jmrt.2021.05.004
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51971226] ; National Basic Research Program of China[2017YFB 0305201]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000677670200009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159639
Collection中国科学院金属研究所
Corresponding AuthorYan, Wei; Yang, Ke
Affiliation1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liang, Ye,Yan, Wei,Shi, Xianbo,et al. Transfer from M3B2 boride to BN nitride in 9Cr3W3CoB martensitic heat-resistant steel[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2021,13:513-523.
APA Liang, Ye.,Yan, Wei.,Shi, Xianbo.,Li, Yanfen.,Wang, Wei.,...&Yang, Ke.(2021).Transfer from M3B2 boride to BN nitride in 9Cr3W3CoB martensitic heat-resistant steel.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,13,513-523.
MLA Liang, Ye,et al."Transfer from M3B2 boride to BN nitride in 9Cr3W3CoB martensitic heat-resistant steel".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 13(2021):513-523.
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