Physical properties and microstructures of nanocrystals reinforced ice laser 3D print layer |
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| Affiliation: | 1. School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, PR China;2. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, PR China;1. Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;2. Hubei Key Laboratory for Engineering Structural Analysis and Safety Assessment, Wuhan 430074, China;1. Donbass State Engineering Academy, Kramatorsk 84313, Ukraine;2. Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia-UdeA, Calle 70 No. 52-21, Medellín, Colombia;3. Escuela de Ingeniería de Antioquia-EIA, Medellín, Colombia;4. Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Ave. Universidad 1001, CP 62209 Cuernavaca, Morelos, México;5. Institute of Physics, Kyiv 80028, Ukraine;1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada R3T 2N2;2. Department of Solid State Physics, Yerevan State University, Yerevan, Armenia;1. Instituto de Física, Universidade Federal de Mato Grosso, 78060-900 Cuiabá, Mato Grosso, Brazil;2. Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, 60455-900 Fortaleza, CE, Brazil;3. Faculdade de Ciências Aplicadas, Universidade Estadual de Campinas - UNICAMP, R. Pedro Zaccaria, 1300, 13484-350 Limeira, SP, Brazil;1. Institute of Strength Physics and Materials Science of SB RAS, 2/4 Akademichesky Avenue, Tomsk 634021, Russia;2. V.D. Kuznetsov Siberian Physical Technical Institute of Tomsk State University, 1 Novosobornaja Square, Tomsk 634050, Russia |
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| Abstract: | 
Rapid prototyping based on laser alloying by the pre-placed mixed powders has been used to produce the nanocrystals reinforced three-dimensional layer in this study. Such a layer was fabricated on a TC17 titanium alloy by laser rapid prototyping (LRP) of the Co–Sb–TiB2 mixed powders in ice. Scanning electron microscope (SEM) and high resolution transmission electron microscopy (HRTEM) test results indicated that the ice addition was able to decrease the maximum temperature of molten pool during the LRP process, favoring the formation of nanocrystals; growth of such nanocrystals was retarded by the surrounded amorphous in a certain extent, favoring the formations of ultrafine nanoparticles (UN), and the twin crystals and the high-angle grain boundaries were also observed; differential thermal analysis (DTA) test was used to explain the physical properties and formation mechanism of amorphous–nanocrystals, and also the relationship between the amorphous and nanocrystalline phases in such a LRP layer. |
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| Keywords: | Rapid prototyping Lasers Nanocrystalline materials |
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