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sigma-Phase Precipitation Mechanism of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel During Long-Term Thermal Exposure
Wang, ZN; Liang, T; Xing, WW; Du, AB; Gao, M; Ma, YC; Liu, K; Liang, T (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China.
2018-03-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume31Issue:3Pages:281-289
AbstractThe sigma-phase precipitation in 20% cold-worked 15Cr-15Ni titanium-modified austenitic stainless steel was studied during long-term aging treatment. During the isothermal aging stage, the amount of sigma-phase was significantly increased at beginning and gradually became constant. The aging time only slightly affected the size and morphology of the sigma-phase. Conversely, during the isochronal aging stage, the amount of sigma-phase grew rapidly with the increase in the aging temperature. The sigma-phase with a large amount of stacking faults was prone to nucleate around the (Ti, Mo) C particles or at the grain boundaries. The (Ti, Mo) C particles can act as effective nucleation sites, where the sigma-phase directly precipitates from the austenitic matrix. From this work, the growth of sigma-phase is found to be influenced by the aging temperature, and a new mechanism of sigma-phase precipitation from austenite has been proposed.; The sigma-phase precipitation in 20% cold-worked 15Cr-15Ni titanium-modified austenitic stainless steel was studied during long-term aging treatment. During the isothermal aging stage, the amount of sigma-phase was significantly increased at beginning and gradually became constant. The aging time only slightly affected the size and morphology of the sigma-phase. Conversely, during the isochronal aging stage, the amount of sigma-phase grew rapidly with the increase in the aging temperature. The sigma-phase with a large amount of stacking faults was prone to nucleate around the (Ti, Mo) C particles or at the grain boundaries. The (Ti, Mo) C particles can act as effective nucleation sites, where the sigma-phase directly precipitates from the austenitic matrix. From this work, the growth of sigma-phase is found to be influenced by the aging temperature, and a new mechanism of sigma-phase precipitation from austenite has been proposed.
description.department[wang, zhi-nan ; liang, tian ; xing, wei-wei ; gao, ming ; ma, ying-che ; liu, kui] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, liaoning, peoples r china ; [du, ai-bing] china inst atom energy, beijing 102413, peoples r china
KeywordReactor Applications Creep Strength Temperature Cr Ti Kinetics Elements Cracking Fission Mo
Subject AreaMetallurgy & Metallurgical Engineering
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79453
Collection中国科学院金属研究所
Corresponding AuthorLiang, T (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, ZN,Liang, T,Xing, WW,et al. sigma-Phase Precipitation Mechanism of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel During Long-Term Thermal Exposure[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2018,31(3):281-289.
APA Wang, ZN.,Liang, T.,Xing, WW.,Du, AB.,Gao, M.,...&Liang, T .(2018).sigma-Phase Precipitation Mechanism of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel During Long-Term Thermal Exposure.ACTA METALLURGICA SINICA-ENGLISH LETTERS,31(3),281-289.
MLA Wang, ZN,et al."sigma-Phase Precipitation Mechanism of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel During Long-Term Thermal Exposure".ACTA METALLURGICA SINICA-ENGLISH LETTERS 31.3(2018):281-289.
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