High Temperature Deformation Behaviour of Particulate Reinforced Aluminium Composites

입자분산강화 알루미늄 복합재료의 고온거동에 관한 연구

  • Gwon, Hyeok-Cheon (Dept. of Metallurgical Engineering, Hanyang University) ;
  • Yun, Ui-Park (Dept. of Metallurgical Engineering, Hanyang University)
  • 권혁천 (한양대학교 금속공학과) ;
  • 윤의박 (한양대학교 금속공학과)
  • Published : 1995.10.01


The hot deformation behaviour of particulate reinforced aluminium 6061 Al composite were investigated by hot compression tests in the temperature range from 623K to 823K with strain rate of 10$^{-3}$ ~5.0 S$^{-1}$ . The effect of reinforced particulate volume fraction, mean diameter on the high temperature flow stress has also been studied. Experimental results showed that the increase in the volume fraction of reinforcement contributed to the rising of yield stress, but the stress above the yield point appeared to be steady state at all volume fractions. The apparent activation energy for deformation was 290KJ/mo1 for unreinforced 6061 Al, 327KJ/mo1 for 6061 Al-20vo1.% SiC composite and 531KJ/mo1 for 6061 Al-20vo1.%A1$_2$O$_3$composite. It appeared that $Al_2$O$_3$reinforced composites was more difficult to hot deform.



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