Finite element simulation and experimental investigation of forming micro-gear with Zr–Cu–Ni–Al bulk metallic glass |
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| Authors: | Dong Wang Teilin Shi Jie Pan Guanglan Liao Zirong Tang Lin Liu |
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| Affiliation: | 1. State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2. Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China;3. State Key Laboratory of Materials Processing and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China;1. Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China;3. Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA;4. Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK;1. The University of Western Australia, School of Mechanical and Chemical Engineering, Perth, WA 6009, Australia;2. The University of Queensland, School of Mechanical and Mining Engineering, Brisbane, QLD 4072, Australia |
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| Abstract: | Bulk metallic glasses exhibit some unique physical properties as compared to their corresponding crystalline alloys. Due to the superplasticity by behaving like a Newtonian fluid in their supercooled liquid region, the bulk metallic glasses can be used to make high strength microparts by net-shape forming. In this paper, the compressive tests of Zr–Cu–Ni–Al metallic glass are performed with different strain rates at a temperature of 683 K. According to the experimental results, the forming evolution of a metallic glass micro-gear is simulated using a finite element simulation software DEFORM 3D, and the forming load is predicted at different processing parameters. Meanwhile, the filling stages of bulk metallic glass in the micro-gear mold cavity are investigated by finite element simulation and experiment. The predicted workpiece geometry shows good agreement with experimental result. The forming experiments for micro-gear of Zr–Cu–Ni–Al metallic glass are carried out by hot embossing process, and the amorphous micro-gears are obtained successfully. It is found that the finite element simulation results are in reasonable agreement with the experimental observation. |
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