In-situ laser additive manufacturing of Ti6Al4V matrix composites by gas-liquid reaction in dilute nitrogen gas atmospheres

doi:10.1016/j.matdes.2021.109578

	In-situ laser additive manufacturing of Ti6Al4V matrix composites by gas-liquid reaction in dilute nitrogen gas atmospheres
	Wei, Wenhou 1; Wu, Wenjie 1; Fan, Shuqian 1; Duan, Xuanming 2
刊名	MATERIALS & DESIGN
	2021-04-01
卷号	202 页码:11
关键词	3D printing Additive manufacturing Gas-liquid reaction Nitrides Titanium matrix composite
ISSN号	0264-1275
DOI	10.1016/j.matdes.2021.109578
通讯作者	Fan, Shuqian(fansq@cigit.ac.cn) ; Duan, Xuanming(xmduan@jnu.edu.cn)
英文摘要	Processing titanium(Ti)-basedmaterials in high-concentration nitrogen gas (N-2) atmosphere is creditedwith reducing ductility/plasticity arising from the excessive formation of brittle agglomerated TiN. However processing these materials in dilute N-2 may reduce the risk. In this study, a novel method is developed for laser additive manufacturing of in-situ synthesized TiN and AlN co-reinforced Ti6Al4V matrix composites (NTMCs) by the gas-liquid reaction in low-concentration N-2 atmospheres. The manufacturing process of the NTMCs involves melting Ti6Al4V powders followed by laser-induced pyrolysis of N-2 near the melt pool. The process is facilitated by the reaction between the decomposed nitrogen and molten Ti6Al4V, dissolution and precipitation of nitrides, and formation of the composites layer-by-layer. The formation of the nitride precipitates was verified by XRD, SEM, EDS, and HR-TEM. Such in-situ synthesized nanoscale reinforcements exhibited good dispersion and strong interfacial bonding with thematrix alloy in the composites. Themicrohardness, 0.2% compressive yield strength, and ultimate compressive strength of the NTMCs significantly increased with increasing N-2 concentration in additive manufacturing; their maxima were 511 HV, 1721 MPa, and 2010 MPa, respectively, increased by 36.3%, 67.9%, and 16.8% from those of the Ti6Al4V alloy. The formation and strengthening mechanisms of the NTMCs were elucidated. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
资助项目	National Natural Science Foundation of China[51901220] ; National Natural Science Foundation of China[51675507] ; Instrument Developing Project of the Chinese Academy of Sciences[YZ201456] ; Key Research Program of the Chinese Academy of Sciences[KGZD-EW-T04]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000628760800001
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/13148]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Fan, Shuqian; Duan, Xuanming
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Addit Mfg Technol & Syst, Chongqing 400714, Peoples R China 2.Jinan Univ, Inst Photon Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Peoples R China
推荐引用方式 GB/T 7714	Wei, Wenhou,Wu, Wenjie,Fan, Shuqian,et al. In-situ laser additive manufacturing of Ti6Al4V matrix composites by gas-liquid reaction in dilute nitrogen gas atmospheres[J]. MATERIALS & DESIGN,2021,202:11.
APA	Wei, Wenhou,Wu, Wenjie,Fan, Shuqian,&Duan, Xuanming.(2021).In-situ laser additive manufacturing of Ti6Al4V matrix composites by gas-liquid reaction in dilute nitrogen gas atmospheres.MATERIALS & DESIGN,202,11.
MLA	Wei, Wenhou,et al."In-situ laser additive manufacturing of Ti6Al4V matrix composites by gas-liquid reaction in dilute nitrogen gas atmospheres".MATERIALS & DESIGN 202(2021):11.