소성∙가공 (Transactions of Materials Processing)

  • 제12권2호
  • /
  • Pages.94-101
  • /
  • 2003
  • /
  • 1225-696X(pISSN)
  • /
  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
권호 표지
DOI QR코드

DOI QR Code

고액공존재료의 변형거동에서 재료의 크기가 액상편석에 미치는 영향

The Effect of Specimen Size on Liquid Segregation in Deformation Behavior of Mushy State Material

  • 윤성원 (부산대 대학원 기계공학부) ;
  • 서판기 (부산대 대학원 기계공학부) ;
  • 강충길 (부산대 기계공학부, 정밀정형 및 금형가공 연구소(ERC/NSDM))
  • 발행 : 2003.04.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

For the optimal net shape forging of S semi-solid materials (SSM), it is important to predict the deformation behavior and defects of materials. Among these defects, liquid segregation is detrimental to produce products with good mechanical properties. Moreover, to apply a numerical method to thixoforging, it is very important to prevent a liquid segregation during forming process. The liquid segregation phenomena in deformation behavior of semi-solid material with variation of test specimen size were studied. The SSM compression tests were performed by dynamic material test system with a furnace. Stress-strain curves and microstructures of SSM were investigated, and Porosities were analyzed to evaluate the effects of experiment parameters on liquid segregation.

키워드

참고문헌

  1. 정경득, 강충길, 2000, "반용융 합금의 압축공정에서 다단 속도 제어가 액상편석에 미치는 영향", 한국소성가공학회지, 제 9권, 제 7호, pp. 706-715.
  2. Suery, M., Flemings, M.C., 1982, "Effect of Strain Rate on Deformation Behavior of Semi-sold Dendritic Alloys", Metall. Trans., Vol. 13A, pp. 1809-1819.
  3. Loue, W.R., Suery, M., Querbes, J.L., 1992, "Microstructure and Rheology of Partially Remelted AlSi Alloys", Proc. 2nd Int. Conf. on Semi-Solid Processing of Alloys and Composites, MIT, USA, pp. 266-275.
  4. Yoshida, C., Moritaka, M., Shinya, S., Takebayashi, K., Nanba, 1992, "Semi-solid Forging of Aluminium Alloys", Proc. of 2nd Int. Conf. on Semi-solid Processing of Alloys and Composites, S.B. Brown, M.C. Flemings(eds), MIT, pp. 95-102.
  5. Pinsky, D.A., Charreyron, P.O., Flemings, M.C., 1884, "Compression of Semi-Solid Dendritic Sn Pb Alloys at Low Strain Rates", Metal. Trans., 15B, pp. 173-181.
  6. Kang, C.G., Jung, G.D., 2001, "Improvement of the Liquid Segregation Phenomena of Semisolid Aluminium Alloys by the Multistage Strain Rate Control in the Compression Test", J. Mater. Eng. and Perfor., Vol. 10(No. 4), pp. 419-428. https://doi.org/10.1361/105994901770344836
  7. Valencia, J.J., Friedhoff, T.G., Creeden, T.P., and Cardarella, J.J. 1998, "Microstructural Evaluation of Rapidly Heated Aluminium A356 Alloy Billets", Proc. of 5th Int. Conf. on Semi-solid Processing of Alloys and Composites, eds. by A.K. Bhasin, J.J. Moore, K.P. Young, S. Midson, Golden. Colorado School of Mines, June 23-25th, pp. 397-404.
  8. Chen, C.P., Tsao, C.Y., 1996, "Semi-solid deformation of A356 Al alloys, Proc. of 4th Int. Conf. on Semi-solid Processing of Alloys and Composites, eds. by Kirwood, D.H. and Kapranos, P., University of Sheffield, England, June 19-21th, pp. 16-20.
  9. Althix Billets, Aluminium Pechiney, 1996.
  10. Kang, C.G., Choi, J.S., and Kim, K.H., 1999, "The effect of strain rate on macroscopic behavior in the compression forming of semi-solid aluminum alloy", J. of Mater. Process. Technol., Volume 88, Issues 1-3, April 15, pp. 159-168. https://doi.org/10.1016/S0924-0136(98)00383-5