Microdeformation of soft particles in metal matrix composites |
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| Authors: | Sebastian Balos Leposava Sidjanin |
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| Affiliation: | 1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China;2. Department of Mechanical Engineering, Chengdu Technological University, Chengdu, Sichuan 610031, China;1. University of Novi Sad, Faculty of Technology, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia;2. Institute of Macromolecular Chemistry AS CR v.v.i., Heyrovského nám. 2, 162 06 Prague, Czech Republic;3. University of Novi Sad, Faculty of Technical Sciences, Department of Production Engineering, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia;1. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;1. Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark;2. Department of Wind Energy, Technical University of Denmark, Risø Campus, Roskilde, 4000, Denmark;3. Materials Science & Technology Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN, 37831-6118, USA;4. Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439-4800, USA |
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| Abstract: | In this study, microdeformation of soft particles in metal matrix composites was investigated. For that purpose, two different types of ductile iron having different metal matrix microstructures were tensile stressed and compressed. It was found that graphite nodules do not change their shape during tensile stressing, only decohesion occurs on the graphite and metal matrix interface. However, compression testing at room temperature resulted in a significant change in graphite shape. A relationship between average aspect ratio of graphite after various degrees of compression and bulk material deformation was devised. Furthermore, graphite nodule and metal matrix microdeformation was compared to bulk material deformation. This implies that deformation process is not homogenous. It strongly depends on metal matrix microstructure and can be represented with deformation ratio (K). Deformed or deformed and cracked graphite nodules were found on the fractured surface of compressed specimens, indicating that the graphite does not turn into powder during compression at room temperature, as other previous researches found. |
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