Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Microstructural Evolution during Hot Deformation of P/M Copper using Processing Map

변형지도 모델링을 통한 구리 분말 소결체의 고온 변형에 따른 미세조직 연구

  • Chang, Soo-Ho (School of Material Science and Metallurgical Engineering, Kyungpook National University) ;
  • Kim, Young-Moo (Defense Material and Evaluation Technology Directorate, Agency for Defense Development) ;
  • Park, Kyung-Chae (School of Material Science and Metallurgical Engineering, Kyungpook National University)
  • 장수호 (경북대학교 금속공학과) ;
  • 김영무 (국방과학연구소 국방소재기술부) ;
  • 박경채 (경북대학교 금속공학과)
  • Received : 2012.02.04
  • Accepted : 2012.03.13
  • Published : 2012.04.28
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Abstract

P/M coppers are subjected to the isothermal compression tests at the strain rate ranging from 0.01 to 10.0 $s^{-1}$ and the temperature from 200 to $800^{\circ}C$. The processing map reveals the dynamic recrystallization (DRX) domain in the following temperature and strain rate ranges: $600-800^{\circ}C$ and 0.01-10.0 $s^{-1}$, respectively. In the domain, the region at temperature of $600^{\circ}C$ and strain rate of $10^{-2}s^{-1}$ shows peak efficiency. From the kinetic analysis, the apparent activation energy in the DRX domain is 190.67 kJ/mol and it suggests that lattice self-diffusion is the rate controlling mechanism.

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References

  1. W. P. Walters: Fundamental of Shaped Charges, Wiley, New York (1989).
  2. Y. V. R. K. Prasad and S. Sasidhara: Hot Working Guide: A Compendium of Processing Maps, ASM International (1997).
  3. Y. V. R. K. Prasad and S. Sasidhara: Mat. Sci. Eng. A, 391 (2005) 141. https://doi.org/10.1016/j.msea.2004.08.049
  4. Y. V. R. K. Prasad and K. P. Rao: Trans. ASME, 128 (2006) 158.
  5. Y. Kim, S. H. Lee, S. Lee and J.-W. Noh: J. Kor. Powd. Met. Inst., 15 (2008) 458. https://doi.org/10.4150/KPMI.2008.15.6.458
  6. H. Ziegler: Progress in Solid Mechanics, Wiley, New York (1963) 93.
  7. F. J. Humphreys and M. Hatherly: Recystallization and related annealing phenomena, Pergamon (1995) 369.
  8. J. J. Jonas: Metall. Rev., 14 (1969) 1. https://doi.org/10.1179/095066069790138056
  9. G. Neumann and V. Tolle: Phil. Mag., A54 (1986) 619.
  10. Y. Mishin, Chr. Hezig, J. Bernardini and W. Gust: Int. Mater. Rev., 42 (1997) 155. https://doi.org/10.1179/095066097790093226
  11. R.W. Balluffi: Phys. Stat. Sol., 42 (1970) 11. https://doi.org/10.1002/pssb.19700420102
  12. Y. V. R. K. Prasad and K. P. Rao: Mat. Sci. Eng. A, 374 (2004) 335. https://doi.org/10.1016/j.msea.2004.03.007

Cited by

  1. Hot Deformation Behavior and Microstructural Evolution of Powder Metallurgy Ti-6Al-4V Alloy vol.21, pp.4, 2014, https://doi.org/10.4150/KPMI.2014.21.4.277