Microstructure performance and formation mechanism of laser alloying rare earth oxides modified nanocrystalline layer on TA7 |
| |
| Institution: | 1. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China;2. School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China;1. Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China;2. Modouo Science and Technology Communication Center, Maowei Science and Technology Ltd., China;1. Semiconductor Research Lab, Department of Physics, Gurukula Kangri University, Haridwar, India;2. Department of Physics, University of the Free State, Bloemfontein, South Africa;1. Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7D, Arica, Chile;2. Department of Solid State Physics, Yerevan State University, Alex Manoogian 1, 0025 Yerevan, Armenia;3. National University of Architecture and Construction of Armenia, Teryan 105, 0009 Yerevan, Armenia;4. SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom;1. The Department of Physics, Guangxi Medical University, Nanning, Guangxi 530021, China;2. School of Physics and Electronics, Yancheng Teachers University, Yancheng 224051, PR China |
| |
| Abstract: | Nanoscale particles (NP) were observed in a Ni60–Ag–Si3N4–Y2O3 laser alloying (LA) layer on a TA7 titanium alloy, NP usually locate on the grain boundaries, which are able to block the motion of dislocation in a certain extent. Such layer mainly consisted of γ-Ni, TiN, γ-(Fe, Ni), TiAg and lots of amorphous phases. The wear resistance of such layer with laser scanning speed 3 mm/s was better than that of a LA layer with 6 mm/s, which was mainly ascribed to an uniform microstructure and less defect of layer. The high laser scanning speed made the existing time of laser molten pool be shorter than before, favoring the formation of a fine microstructure. However, the defects, such as pores were produced in LA layer (higher scanning speed), decreasing the wear resistance. |
| |
| Keywords: | Metal-matrix composites (MMCs) Surface properties Surface treatments Laser alloying |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
