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Microstructure evolution and mechanical properties of ODS FeCrAl alloys fabricated by an internal oxidation process
Li, Jing1; Wu, Sajian1; Ma, Ping2; Yang, Ying3; Wu, Erdong1; Xiong, Liangyin1; Liu, Shi1
Corresponding AuthorLi, Jing(jingli@imr.ac.cn)
2019-05-29
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume757Pages:42-51
AbstractThe fabrication of oxide dispersion strengthened (ODS) FeCrAl alloys by an innovative internal oxidation process is presented herein. The internal oxidation process for a precursor ODS FeCrAl alloy powder consists of two consecutive procedures. Active Y is segregated and enriched on the surface and grain boundaries of the ferritic powder during the first vacuum treatment. Yttrium oxide dispersoids are preferentially generated during the next oxidation treatment and become the precursors for the nanometric oxide precipitates in the subsequent hot consolidation. Nanometric Y2O3 and Y-Al-O precipitates are observed in the nominal compositions of Fe-16C-4.5Al-2W-0.5Ti-0.5V-0.2Y, Fe-16Cr-4.5Al-2W-0.5Ti-0.5V-0.5Y and Fe-14Cr-4.5Al-2W-0.5Ti-0.25Zr-0.8Y alloys and show a wide size distribution range from less than 10 nm to a maximum of 400 nm. No observable carbide, nitride inclusions or Al2O3 particles are identified. The improvement in the tensile strength of ODS alloys fabricated by the oxidation process is attributed to the dispersed nanometric oxide precipitates. The good ductility of the alloys is ascribed to the deficiency of ultrafine grains.
KeywordOxide dispersion strengthened Internal oxidation process Nanometric Y-Al-O precipitates Microstructure and mechanical properties
Funding OrganizationMinistry of Science and Technology of the Peoples Republic of China ; China General Nuclear Power Group ; Shenyang Municipal Bureau of Science and Technology
DOI10.1016/j.msea.2019.04.088
Indexed BySCI
Language英语
Funding ProjectMinistry of Science and Technology of the Peoples Republic of China[2015ZX06004001] ; China General Nuclear Power Group[4500096267] ; China General Nuclear Power Group[3100069733] ; Shenyang Municipal Bureau of Science and Technology
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000470944600005
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/134211
Collection中国科学院金属研究所
Corresponding AuthorLi, Jing
Affiliation1.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Mat Special Environm Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Anhui Univ Technol, Anal & Testing Cent, Hefei 243002, Anhui, Peoples R China
3.China Nucl Power Technol Res Inst, ATF Res & Dev Team, Shenzhen 518000, Peoples R China
Recommended Citation
GB/T 7714
Li, Jing,Wu, Sajian,Ma, Ping,et al. Microstructure evolution and mechanical properties of ODS FeCrAl alloys fabricated by an internal oxidation process[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,757:42-51.
APA Li, Jing.,Wu, Sajian.,Ma, Ping.,Yang, Ying.,Wu, Erdong.,...&Liu, Shi.(2019).Microstructure evolution and mechanical properties of ODS FeCrAl alloys fabricated by an internal oxidation process.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,757,42-51.
MLA Li, Jing,et al."Microstructure evolution and mechanical properties of ODS FeCrAl alloys fabricated by an internal oxidation process".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 757(2019):42-51.
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