Effects of temperature and strain rate on compressive flow behavior of aluminum-boron carbide composites
| Autor: | Nityanand Prabhu, A.G. Rao, Bhagwati Prasad Kashyap, S. Gangolu, V.P. Deshmukh |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Deformation Behavior Composite number Mechanical-Properties Boron carbide Flow stress Carbide Al Fabrication chemistry.chemical_compound Materials Chemistry Composite material Elevated-Temperatures Microstructure Strain (chemistry) Mechanical Engineering Metal matrix composite Strain rate B4c Boron Carbide Particles Metal-Matrix Composites chemistry Mechanics of Materials Alloy Ceramics and Composites Metal Matrix Composite Deformation (engineering) Creep-Behavior Aluminum |
| Zdroj: | Journal of Composite Materials. 48:1313-1321 |
| ISSN: | 1530-793X 0021-9983 |
| DOI: | 10.1177/0021998313485265 |
| Popis: | Flow properties of aluminum and aluminum-boron carbide (Al-B4C) composites, containing 5, 10 and 15 wt% B4C, were investigated by compression tests at strain rates of 10−4, 10−3 and 10−2 s−1 over the temperature range 25 to 500℃. The nature of stress–strain curves as a function of reinforcement, temperature and strain rate revealed that (1) flow stress initially increases as the reinforcement increases, but it decreases for Al-15% B4C composite, (2) flow stress increases with the increase in strain rate, with the strain rate sensitivity index varying from 0.01 for aluminum at 200℃ to 0.30 for Al-5% B4C composite. The activation energy for deformation is found to vary from 124 to 187 kJ/mol for Al-15% B4C and Al-5% B4C composites, respectively. |
| Databáze: | OpenAIRE |
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