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Effects of temperature and strain rate on compressive flow behavior of aluminum-boron carbide composites
S. Gangolu, A.G. Rao, N. Prabhu, V.P. Deshmukh,
Published in SAGE Publications Ltd
Volume: 48
Issue: 11
Pages: 1313 - 1321
Flow properties of aluminum and aluminum-boron carbide (Al-B4C) composites, containing 5, 10 and 15wt% 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 187kJ/mol for Al-15% B4C and Al-5% B4C composites, respectively. © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.
About the journal
JournalData powered by TypesetJournal of Composite Materials
PublisherData powered by TypesetSAGE Publications Ltd