The deformation of particle reinforced metal matrix composites during temperature cycling |
| |
| Affiliation: | 1. Division of Renewable Energy and Environment, Ashikaga Institute of Technology, 268-1 Omae, Ashikaga, Tochigi 326-8558, Japan;2. Collaborative Research Center, Ashikaga Institute of Technology, 268-1 Omae, Ashikaga, Tochigi 326-8558, Japan;3. Department of Mechanical Engineering, Jomo Kenyatta University of Agriculture and Technology, P.O. Box 62,000 – 00200, Nairobi, Kenya;4. Malaysia Japan International Institute of Technology, University of Technology Malaysia, Jalan Semarak 54100, Kuala Lumpur, Malaysia;5. Graduate School of Eng., Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan;6. University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;1. Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan;2. International Exchange Center, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan;3. Department of Oral Health Care Sciences, Clinical Oral Science of Tokyo Medical and Dental University, 5-45 Yushima 1-chome, Bunkyo-ku, Tokyo 113-8549, Japan |
| |
| Abstract: | Superplasticity during temperature cycling of particle reinforced metal matrix composites has been studied over a range of reinforcement sizes and volume fractions. Above a critical volume and thermal cycle amplitude, the mean strain per cycle is proportional to stress and approximately proportional to cycle amplitude. For a given thermal cycle the constant of proportionality with respect to stress increases with reinforcement fraction to a maximum at around 30%; it then decreases with further increase in reinforcement. Transmission electron microscopy revealed no characteristics dislocation substructure; even after 90% strain the material was indistinguishable from its undeformed state. The experimental results confirm an internal plastic flow model for the phenomenon rather than an enhanced creep. A model of the process derived from the Lévy-Von Mises equations predicts both the effect of thermal cycle amplitude the MMC microstructure on the enhanced creep rate. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
