Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Improvement of Formability of AZ31 Magnesium Alloy Sheet during Warm Deep Drawing

AZ3l 마그네슘합금의 온간디프드로잉시 판재성형성 향상

  • Published : 2006.03.01
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Abstract

In this study, the experiments of warm deep drawing were done with heated die, and with heated die, and blankholder, and cooled punch in order to investigate the formability of AZ31 magnesium alloy sheet in warm deep drawing. For this, warm deep drawing experiments were executed under various temperatures and punch velocities. The results of warm deep drawing with heated die showed that fracture occurred around the punch part at punch velocity of 75mm/min and punch stroke of 10mm under temperature range of 373-523K, but did not occur under temperature range of 548-673K even punch stroke of 25mm. And fracture at the punch stroke of 25mm and the temperature of 523K did not occur under the punch velocity of 30mm/min, but occurred under punch velocity of 75 and 125mm/min. Also warm deep drawing with heated die and blankholder, and cooled punch showed that the temperature range happening maximum height under punch velocity of 10-100mm/min was around 498-523K. Finally, with heating and cooling technique necking of AZ31 magnesium alloy occurred at punch shoulder part under the temperature range of 293-423K, but at die wall part under the temperature range of 473-573K.

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References

  1. S. Yoshihara and et. al., 2004, Optimization of Magnesium Alloy Stamping with Local Heating and Cooling Using the Finite Element Method, J. of materials processing technology 153-154, pp. 319-322 https://doi.org/10.1016/j.jmatprotec.2004.04.361
  2. E. Doege, KdrOder, 2001, Sheet Metal Forming of Magnesium Wrough Alloy Formability and Process Technology, J.of materials processing technology 115, pp. 11-19
  3. 김민철, 이영선, 권용남, 이정환, 2004, AZ31 합금의 온간디프드로잉에관한 연구, 한국소성가공학회 추계학술대회 논문집, pp. 175-179
  4. D. M. Kang, J. K. Hwang, 2004, The Simulations of the Formability of AZ31 Magnesium Alloy Sheet in Warm Deep Drawing, J.of KSMPE, Vol.3 No.1, pp. 52-58
  5. A. El-Morsy, K. Manabe, D. M. Kang, J. K. Hwang, 2002, FE analysis on temperature and deformation of magnesium alloy sheet in warm deep drawing process, NUMISHEET 2002, pp. 171-176
  6. D. M. Kang, K. Manabe, 2005, Improvement on the Formability of Magnesium Alloy Sheet by Heating and Cooling Method(II), Proceedings of KSTP Spring Conference 2005, pp. 385-388
  7. R. Hill, 1952, On Discontinuous Plastic States with Special Reference to Localized Necking in Thin Sheets, J. of mech. Phys. Solid, Vol.2. pp. 19-30
  8. A. K. Ghosh, 1974, Strain Localization in the Diffuse Neck in Sheet Metal, Met. Trans., Vol.5. p. 1607 https://doi.org/10.1007/BF02646332