Analysis of Grain Size Evolution of Sintered Al–4wt.%B4C Preforms Subjected to Hot Compression
- 17 Downloads
The objective of this present work is to study the effect of initial relative density (IRD) on microstructure evolution of sintered Al–4wt.%B4C preforms during hot compression tests with different temperatures and strain rates. The hot compression tests of sintered Al–4wt.%B4C preforms were performed in a hydraulic press for different range of temperature (300–500) °C, strain rate (0.1–0.3 s−1), IRD (80–90)%, and deformation degree (10–50)%. The microstructure of sintered Al–4wt.%B4C preforms was characterized by optical microscope, and the average dynamic recrystallization grain size was calculated by intercept line method. It is found that the average grain size of sintered Al–4wt.%B4C deformed preforms is increased with increasing deformation temperature and IRD, whereas it decreased with increasing the strain rate and deformation degree. On the other hand, the average grain size of sintered Al–4wt.%B4C deformed preforms is dependent on the Zener–Hollomon (Z) parameter.
KeywordsAl–4wt.%B4C preform Grain size Hot compression test Deformation degree
R. Seetharam thanks National Institute of Technology Warangal (NITW) for providing research fellowship of the Ministry of Human Resource Development (MHRD), India.
- 2.X.G. Chen, L. St-Georges, M. Roux, Mechanical behavior of high boron content Al-B4C metal matrix composites at elevated temperatures. Mater. Sci. Forum 706, 631–637 (2012). https://doi.org/10.4028/www.scientific.net/MSF.706-709.631 CrossRefGoogle Scholar
- 6.R. Harichandran, N. Selvakumar, Effect of nano/micro B4C particles on the mechanical properties of aluminium metal matrix composites fabricated by ultrasonic cavitation-assisted solidification process. Arch. Civil. Mech. Eng. 16, 147–158 (2016). https://doi.org/10.1016/j.acme.2015.07.001 CrossRefGoogle Scholar
- 16.M.A.J. Taleghani, E.M.R. Navas, M. Salehi, J.M. Torralba, Hot deformation preforms and flow stress prediction of 7075 aluminium alloy powder compacts during compression at elevated temperatures. Mater. Sci. Eng., A 534, 624–631 (2012). https://doi.org/10.1016/j.msea.2011.12.019 CrossRefGoogle Scholar