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Designing ultrafine lamellar eutectic structure in bimodal titanium alloys by semi-solid sintering
Kang LM; Yang C; Wang F; Li XX; Zhu DZ; Zhang WW; Chen WP; Huan Y(郇勇); Yang, C (reprint author), South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Peoples R China.
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
2017-04-25
Volume702Pages:51-59
ISSN0925-8388
Abstract

We report on a novel approach to design typical ultrafine lamellar eutectic structure in bimodal alloys fabricated by semi-solid sintering (SSS) of a eutectic mixture. In our work ultrafine lamellar eutectic structure was implemented by controlling the phase composition of eutectic reaction and consequently by regulating the structure of eutectic reaction-induced liquid phase through varying component number. Microstructure analysis indicate that although all SSSed alloys have the same three phase constitutions of bcc beta-Ti(Fe Co) and fcc Ti-2(Co Fe) the morphology and distribution of the eutectic structure transforms from limited length and minor quantity to partial fine alternating bcc beta-Ti and bcc Ti(Fe Co) lamellae and further to typical complete ultrafine alternating continuous lamellae in the SSSed ternary Ti-Fe-Co quaternary Ti-Fe-Co-Nb and quinary Ti-Fe-Co-Nb-Al alloys. Interestingly the SSSed Ti-Fe-Co-Nb-Al alloy presents a novel bimodal microstructure of coarse fcc Ti-2(Co Fe) surrounded by an ultrafine lamellar eutectic matrix containing ultrafine bcc beta-Ti and bcc Ti(Fe Co) lamellae. This bimodal microstructure exhibits ultra-high yield strength of 2050 MPa with plasticity in compression of 19.7% which exceed published values of equivalent materials. Our results provide a novel pathway for fabricating new-structure metallic alloys for high-performance structural applications. (C) 2017 Elsevier B.V. All rights reserved.

KeywordBimodal Titanium Alloys Eutectic Semi-solid Liquid Phase Sintering Spark Plasma Sintering
DOI10.1016/jjallcom.2017.01.257
Indexed BySCI ; EI
Language英语
WOS IDWOS:000395842400007
WOS KeywordHIGH-STRENGTH ; ENHANCED DUCTILITY ; MECHANICAL-PROPERTIES ; DENDRITE COMPOSITE ; LARGE PLASTICITY ; AMORPHOUS PHASE ; BULK ALLOYS ; NB ALLOYS ; FE ; MICROSTRUCTURE
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China(51574128 ; Guangdong Natural Science Foundation for Research Team(2015A030312003) ; Guangdong Application-oriented Special Funds for Science and Technology RD(2016B090931002) ; Guangdong Special Funds(2014A010105020) ; 11372323)
DepartmentLNM实验平台
Classification一类
Ranking5+
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60567
Collection非线性力学国家重点实验室
Corresponding AuthorYang, C (reprint author), South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Peoples R China.
Recommended Citation
GB/T 7714
Kang LM,Yang C,Wang F,et al. Designing ultrafine lamellar eutectic structure in bimodal titanium alloys by semi-solid sintering[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,702:51-59.
APA Kang LM.,Yang C.,Wang F.,Li XX.,Zhu DZ.,...&Yang, C .(2017).Designing ultrafine lamellar eutectic structure in bimodal titanium alloys by semi-solid sintering.JOURNAL OF ALLOYS AND COMPOUNDS,702,51-59.
MLA Kang LM,et al."Designing ultrafine lamellar eutectic structure in bimodal titanium alloys by semi-solid sintering".JOURNAL OF ALLOYS AND COMPOUNDS 702(2017):51-59.
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