DOI QR코드

DOI QR Code

Measurements of Micro-Defects in the Aluminum Thixoformed Part using Computed Tomography(CT) Technology

CT를 이용한 알루미늄 반응고 성형품의 미세 결함 측정

  • 이상용 (국립안동대학교 공과대학 신소재공학부) ;
  • 김찬현 (주식회사 와이지원 기술부)
  • Published : 2009.08.01

Abstract

Computed tomography(CT) has been applied to measure micro-defects in the aluminum knuckle parts manufactured by the thixoforming process. 6061 aluminum alloys were used to form knuckle samples in the semi-solid temperature after the SIMA processing of billets. Tensile specimens were cut from the different locations in a thixoformed knuckle. The size and the distribution of forming defects in tensile specimens were analyzed using CT scanning and image analysis technology before tensile tests. It has been qualitatively shown that the stress-strain curves were significantly affected by the size and the distribution of forming defects although the defect sizes lie in the range of micro-meters.

Keywords

References

  1. W. S. Jung, S. Y. Lee, P. W. Shin, 2005, Process Control and Thixoforming of Cu Rotor for High Efficiency Motors, J. Kor. Soc. Technol. Plast., Vol. 14, No. 7, pp. 642-648 https://doi.org/10.5228/KSPP.2005.14.7.642
  2. S. Y. Lee, S. I. Oh, 2002, Thixoforming characteristics of thermo-mechanically treated AA6061 alloy for suspension parts of electric vehicles, J. Mater. Process. Technol., Vols. 130-131, pp. 587-593 https://doi.org/10.1016/S0924-0136(02)00818-X
  3. A. M. Gokhale, G. R. Patel, 2005, Analysis of variability in tensile ductility of a semi-solid metal cast A356 Al-alloy, Mater. Sci. Eng. A, Vol. 392, pp. 184-190 https://doi.org/10.1016/j.msea.2004.09.051
  4. S. M. Yoo, I. S. Jo, M. G. Choi, J. G. Choi, 2005, Inspection of Casting Defects and Quality Improvement using Industrial CT Equipment
  5. S. Y. Lee, B. H. Choi, 2008, Effects of Thixoforming Defects on the Stress-Strain Curves of Aluminum Structural Parts for Automobile, Solid State Phenomena, Vols. 141-143, pp. 743-748 https://doi.org/10.4028/www.scientific.net/SSP.141-143.743

Cited by

  1. Fabrication of a Joint Node for an Aluminum Frame for a Low Speed Electric Vehicle using Thixoforming Technology vol.23, pp.4, 2014, https://doi.org/10.5228/KSTP.2014.23.4.244
  2. Defect Detection of Brazing Joint in Heat Exchanger Using X-ray Image vol.17, pp.10, 2011, https://doi.org/10.5302/J.ICROS.2011.17.10.1044
  3. Microstructures of Bonding Interfaces after Semi-Solid Brazing of Aluminum Using A357 as a Filler Metal vol.21, pp.8, 2012, https://doi.org/10.5228/KSTP.2012.21.8.506