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In situ alloying of directed energy deposition fabricated Ti6Al4V with nitrogen

文献类型：期刊论文

作者Smirnov, SA4; Filippova, AV4; Dubinin, ON4; Shalnova, SA3; Simonov, AP4; Sergeichev, IV4; Qian GA(钱桂安)1; Dmitrieva, AV3; Zherebtsov, SV3; Narayan, RL2
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2025-02-15
卷号1016页码:9
关键词Nitriding Directed energy deposition Ti alloys Compression Lattice strain
ISSN号0925-8388
DOI10.1016/j.jallcom.2025.178872
通讯作者Smirnov, S. A.(Savelii.Smirnov@skoltech.ru) ; Narayan, R. L.(rlnarayan@iitd.ac.in)
英文摘要The effect of increasing N2 content in the shielding gas on the microstructure and mechanical properties of directed energy deposition (DED) fabricated Ti6Al4V is studied. In the presence of 10 % N2 in the Ar-N2 gas mixture, the melt-pool dimensions are higher than that fabricated in pure Ar at all powers. Irrespective of the N2 content in the gas mixture, all fabricated builds predominantly consist of alpha-Ti laths and traces of beta-Ti. The presence of N2 coarsens the microstructure significantly and randomizes the texture. For upto 8 % N2 injected in the gas mixture, the absorbed nitrogen in the build is only 0.2-0.4 %, but at higher N2 concentrations, TiN phase forms. The compressive strength of the builds fabricated in 2 % N2 and 10 % N2 are 25 % and 100 % higher, respectively than that of the build fabricated in pure Ar, although the presence of N2 completely compromises plasticity. Similarly, there is a 66 % increase in the hardness of the builds fabricated in the presence of N2. The observed improvement in the strength of the builds is discussed in the context of the microstructural changes owing to the absorption of N2 in the alloy during the DED process.
分类号一类
WOS关键词TITANIUM MATRIX COMPOSITES ; NITRIDE ; MICROSTRUCTURE ; MECHANISMS ; CARBIDE
资助项目Russian Science Foundation[24-19-00484] ; Ministry of Science and Higher Education of the Russian Federation[075-15-2022-312]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001421197000001
资助机构Russian Science Foundation ; Ministry of Science and Higher Education of the Russian Federation
其他责任者Smirnov, SA ; Narayan, RL
源URL[http://dspace.imech.ac.cn/handle/311007/100071]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
2.Indian Inst Technol, Dept Mat Sci & Engn, Delhi 110016, India;
3.St Petersburg State Marine Tech Univ, St Petersburg 190008, Russia;
4.Skolkovo Inst Sci & Technol, Ctr Mat Technol, Moscow 121205, Russia;
推荐引用方式
GB/T 7714		 Smirnov, SA,Filippova, AV,Dubinin, ON,et al. In situ alloying of directed energy deposition fabricated Ti6Al4V with nitrogen[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2025,1016:9.
APA Smirnov, SA.,Filippova, AV.,Dubinin, ON.,Shalnova, SA.,Simonov, AP.,...&Evlashin, SA.(2025).In situ alloying of directed energy deposition fabricated Ti6Al4V with nitrogen.JOURNAL OF ALLOYS AND COMPOUNDS,1016,9.
MLA Smirnov, SA,et al."In situ alloying of directed energy deposition fabricated Ti6Al4V with nitrogen".JOURNAL OF ALLOYS AND COMPOUNDS 1016(2025):9.

入库方式： OAI收割

来源：力学研究所

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