Journal of Materials Science

, Volume 42, Issue 24, pp 10032–10039 | Cite as

Tensile properties of high-pressure die-cast AM60 and AZ91 magnesium alloys on microporosity variation

  • Choong Do LeeEmail author


The effect of microporosity on the variability in the tensile properties of high-pressure die-cast AM60 and AZ91 alloys was investigated, together with a theoretical prediction based on a constitutive model. The strain rate sensitivity of both alloys was measured through an incremental strain rate change test at room temperature, and the microporosity was measured through quantitative fractography analyses on the fractured surface. The variability in the tensile strength and elongation of both alloys can be empirically described as a power law relationship in terms of the microporosity variation. The defect susceptibility of the UTS and elongation to the microporosity variation in the AZ91 alloy is slightly higher than that in the AM60 alloy. The constitutive prediction on the tensile properties of the AM60 and AZ91 alloys is in good agreement with the experimental results, and it suggests that the defect susceptibility of the tensile properties to the microporosity variation is significantly decreased with the increase of strain hardening exponent.


Magnesium Alloy Tensile Property Area Fraction Strain Rate Sensitivity AZ91 Alloy 


  1. 1.
    Gokhale AM, Patel GR (2002) In: Subodh KD, Michael HS (eds) Proceedings of TMS 2002 automotive alloys and aluminum sheet symposium, TMS, Warrendale, p 65Google Scholar
  2. 2.
    Lee SG, Patel GR, Gokhale AM, Sreeranganathan A, Horstemeyer MF (2005) Scripta Mater 53:851CrossRefGoogle Scholar
  3. 3.
    Cáceres CH (1995) Scripta Metall 32:1851CrossRefGoogle Scholar
  4. 4.
    Cáceres CH, Selling BI (1996) Mater Sci Eng A 220:109CrossRefGoogle Scholar
  5. 5.
    Savas MA, Altintas S (1993) Mater Sci Eng A 173:227CrossRefGoogle Scholar
  6. 6.
    Samuel AM, Samuel FM (1995) Mat Trans A 26:2359CrossRefGoogle Scholar
  7. 7.
    Surappa MK, Blank E, Januet JC (1986) Scripta Metall 20:1281CrossRefGoogle Scholar
  8. 8.
    Herrera A, Kondic V (1977) In: Beeley P (ed) Conference proceedings on solidification and cast metals. Metals Society, Sheffield, p 460Google Scholar
  9. 9.
    Gokhale AM, Patel GR (2005) Scripta Mater 52:237CrossRefGoogle Scholar
  10. 10.
    Ghosh AK (1977) Acta Metall 25:1413CrossRefGoogle Scholar
  11. 11.
    Metal Handbook, 9th ed., Vol.8, ASM, Ohio (1985)Google Scholar
  12. 12.
    Dieter GE (1986) Mechanical metallurgy, 3rd ed. McGraw-Hill, New York, p 275Google Scholar
  13. 13.
    Lee SG, Patel GR, Gokhale AM, Sreeranganathan A, Horstemeyer MF (2006) Mater Sci Eng A 427:255CrossRefGoogle Scholar
  14. 14.
    Mabuchi M, Kubota K, Higashi K (1995) Mat Trans JIM 36:1249CrossRefGoogle Scholar
  15. 15.
    Verma R, Ghosh AK, Kim S, Kim C (1995) Mater Sci Eng A 191:143CrossRefGoogle Scholar
  16. 16.
    Lee S, Furukawa M, Horita Z, Langdon TG (2003) Mater Sci Eng A 342:294CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Technical Development DivisionGM Daewoo Auto & Technology (GMDAT)IncheonKorea

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