Designing ultrafine lamellar eutectic structure in bimodal titanium alloys by semi-solid sintering

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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)
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2017-04-25
卷号	702 页码:51-59
关键词	Bimodal titanium alloys Eutectic Semi-solid Liquid phase sintering Spark plasma sintering
ISSN号	0925-8388
中文摘要	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.
类目[WOS]	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	HIGH-STRENGTH ; ENHANCED DUCTILITY ; MECHANICAL-PROPERTIES ; DENDRITE COMPOSITE ; LARGE PLASTICITY ; AMORPHOUS PHASE ; BULK ALLOYS ; NB ALLOYS ; FE ; MICROSTRUCTURE
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000395842400007
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60567]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 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.,...&Huan Y.(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.