Advertisement

Plastic deformation behavior of ZK60 magnesium alloy with addition of neodymium

  • Kun Yu (余 琨)Email author
  • Xiao-yan Wang (王晓艳)
  • Shou-tai Rui (芮守泰)
  • Ri-chu Wang (王日初)
Article

Abstract

The hot deformation simulation of a ZK60 magnesium alloy at different temperatures from 373 to 673 K and different strain rates of 0.1, 0.01 and 0.002 s−1 was studied by using the Gleebe-1500 simulator. The plastic deformation behavior was measured and the deformation activation energy was calculated. The microstructures of ZK60 magnesium alloy with an addition of neodymium during the deformation process were observed by using Polyvar-MET optical microscope and Tecnai G2 20 TEM. The results show that the working hardening, the dynamic recovery and the dynamic recrystallization occur during the plastic deformation process at different temperatures and strain rates. The dynamic recrystallization starts when the temperature is over 473 K and the DRX grain size after hot deformation is only 5–10 μm. So the refined grains improve both the tensile strength and the elongation of alloys at room temperature. Neodymium is added into the alloy and a precipitate phase Mg12Nd that impedes the movement of dislocations is formed, which benefits to increasing mechanical properties of ZK60 magnesium alloy.

Key words

ZK60 magnesium alloy rare earth plastic deformation behavior dynamic recrystallization 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    ASM International. Magnesium and magnesium alloy [M]. Ohio: Metal Park, 1999: 1–130.Google Scholar
  2. [2]
    LI Wen-xian. Magnesium and magnesium alloy [M]. Changsha: Central South University Press, 2005: 338–380. (in Chinese)Google Scholar
  3. [3]
    CAHN R W. Microstructures and properties of nonferrous alloys [M]. Beijing: Science Press, 1999: 460–485. (in Chinese)Google Scholar
  4. [4]
    BUSSIBA A, ARTZY B A, SHTECHMAN A. Grain refinement of AZ31 and ZK60 Mg alloys—Towards superplasticity studies [J]. Mater Sci Eng A, 2001, A302: 56–62.CrossRefGoogle Scholar
  5. [5]
    YU Kun, LI Wen-xian, WANG Ri-chu. Research, development and application of wrought magnesium alloys [J]. The Chinese Journal of Nonferrous Metals, 2003, 13(2): 277–282. (in Chinese)Google Scholar
  6. [6]
    LUO Z P, SONG D Y, ZHANG S Q. Strengthening effects of rare-earths on wrought Mg-Zn-Zr-RE alloys [J]. Journal of Alloys and Compounds, 1995, 230(2): 109–114.CrossRefGoogle Scholar
  7. [7]
    WEI L Y, DUNLOP G L, WESTENGEN H. Age hardening and precipitation in a cast magnesium rare-earth alloy [J]. Journal of Materials Science, 1996, 31(2): 387–397.CrossRefGoogle Scholar
  8. [8]
    NIE J F, MUDDLE B C. Characterization of strengthening precipitate phases in a Mg-Y-Nd alloy [J]. Acta Materialia, 2000, 48(8): 1691–1703.CrossRefGoogle Scholar
  9. [9]
    NIE J F. Effects of precipitate shape and orientation on dispersion strengthening in magnesium alloys [J]. Scripta Materialia, 2003, 48(8): 1009–1015.CrossRefGoogle Scholar
  10. [10]
    YU Kun, LI Wen-xian, WANG Ri-chu. Mechanical properties and microstructure of as-cast and extruded Mg-(Ce,Nd)-Zn-Zr alloys [J]. Journal of Central South University of Technology, 2005, 12(5):499–502.CrossRefGoogle Scholar
  11. [11]
    KOJIMA Y. Progressive steps in the platform science and technology for advanced magnesium alloys [J]. Mater Sci Forum, 2003, 419/422:3–20.CrossRefGoogle Scholar
  12. [12]
    PARK W J, PARK H, KIM D H. Structure and decomposition behavior of rapid solidified Mg-Nd-X alloys [J]. Mater Sci Eng A, 1994, A179/180: 637–640.CrossRefGoogle Scholar
  13. [13]
    JI Ze-sheng. Research process and new technology of magnesium alloy in Japan [J]. The Chinese Journal of Nonferrous Metals, 2004, 14(12): 1977–1984. (in Chinese)Google Scholar
  14. [14]
    KHOSRHOSHAHI R A, PILKINGTON R, LORIMER G W. The microstructure and creep of as-cast and extruded WE54 alloy [C]// Proceeding of the Third International Magnesium Conference. Manchester, 1996: 261–256.Google Scholar
  15. [15]
    LUO A. Magnesium castings for automotive applications [J]. JOM, 1995, 47(1): 28–31.CrossRefGoogle Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Kun Yu (余 琨)
    • 1
    Email author
  • Xiao-yan Wang (王晓艳)
    • 1
  • Shou-tai Rui (芮守泰)
    • 1
  • Ri-chu Wang (王日初)
    • 1
  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaChina

Personalised recommendations