Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

Microstructural Analysis of Local Tensile Deformation Characteristics in A356 Hollow Sand Cast Chassis Part

A356 중공 주조 샤시 부품에서의 국부적인 인장 변형 특성에 미치는 미세 조직 분석

  • Kim, Jae-Joong (Mg Flat Products Research Project, RIST) ;
  • Ko, Young-Jin (Materials Research Team, R & D Division, Hyundai & Kia Motors Co.) ;
  • Lim, Jong-Dae (Materials Research Team, R & D Division, Hyundai & Kia Motors Co.)
  • 김재중 (포항산업과학연구원 마그네슘판재연구단) ;
  • 고영진 (현대자동차 연구개발총괄본부) ;
  • 임종대 (현대자동차 연구개발총괄본부)
  • Received : 2009.02.16
  • Accepted : 2010.05.25
  • Published : 2010.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

Aluminum rear lower arm is designed for luxury sedan and manufactured by hollow sand casting in the present study. Here we present the relationship between local microstructure and coupon tensile test in the rear lower arm. The characteristics of the local tensile deformation are supposed to be dependent upon Si distribution and DAS (dendrite arm spacing). Si distribution affects the yield strength and DAS affects the elongation of local area in the part, respectively.

Keywords

References

  1. L. Gaines and R. Cuenca, "Operation of an Aluminum-intensive Vehicle: Report on a Sixyear Project," SAE 2002-01-2066, 2002.
  2. B. N. Keshavaram, "Aluminum Alloys for Automotive Disc Brake Calipers," SAE 1999-01-0346, 1999.
  3. J. Nath, "Process & Material Options for Automotive Chassis Aluminum," SAE 950723, 1995.
  4. A. Wickberg, G. Gustafsson and L.-E. Larsson, "Microstructural Effects on the Fatigue Properties of a Cast A17simg Alloy," SAE 840121, 1984.
  5. B. Zhang, M. Garro, A. Giglio and C. Tagliano, "Effect of Dendrite Arm Spacing on Mechanical Properties of Aluminum Alloy Cylinder Heads and Engine Blocks," SAE 2005-01-1683, 2005.
  6. M. D. Dighe and A. M. Gokhale, "Relationship between Microstructural Extremum and Fracture Path in a Cast Al-Si-Mg Alloy," Scr. Mater., Vol.37, No.9, pp.1435-1440, 1997. https://doi.org/10.1016/S1359-6462(97)00277-7
  7. C. H. Caceres, C. J. Davidson and J. R. Griffiths, "The Deformation and Fracture Behavior of an Al...Si...Mg Casting Alloy," Mater. Sci. Eng. A, Vol.197, No.2, pp.171-179, 1999.
  8. A. A. Benzerga, S. S. Hong, K. S. Kim, A. Needleman and E. Van Der Giessen, "Smaller is Softer: An Inverse Size Effect in a Cast Aluminum Alloy," Acta Mater., Vol.49, No.15, pp.3071-3083, 2001. https://doi.org/10.1016/S1359-6454(01)00195-1
  9. D. A. Lados, D. Apelian, P. E. Jones and J. F. Major, "Microstructural Mechanisms Controlling Fatigue Crack Growth in Al-Si-Mg Cast Alloys," Mater. Sci. Eng. A, Vols.468-470, pp.237-245, 2007. https://doi.org/10.1016/j.msea.2006.08.130