Advertisement

Journal of Materials Science

, Volume 43, Issue 22, pp 7148–7156 | Cite as

Deformation mechanism and texture and microstructure evolution during high-speed rolling of AZ31B Mg sheets

  • Hualong Li
  • Emilie Hsu
  • Jerzy SzpunarEmail author
  • Hiroshi Utsunomiya
  • Tetsuo Sakai
Article

Abstract

High-speed rolling of AZ31B was carried out under various preheating temperatures from RT to 350 °C. The evolution of texture, grain sizes, and dislocation density distribution (Kernel average misorientation distributions) in the mid-thickness and surface layer were investigated. Computer simulations of deformation textures were also performed in order to understand deformation mechanisms. It is concluded that the temperature increase due to the plastic and frictional working during high-speed rolling makes the <c+a> slip system more active and, hence, improves the ductility. The surface layer of the specimen has higher temperature and experiences severe shear stress; therefore the texture, microstructure, and dislocation density distribution are different from those of the mid-thickness of the specimen. Both mid-thickness and surface layer are dynamically recrystallized during the high-speed rolling.

Keywords

Dislocation Density Slip System Pole Figure Dynamic Recrystallization Critical Resolve Shear Stress 

References

  1. 1.
    Doege E et al (2003) Magnesium—alloys and technologies. Wiley-VCM, USA, pp 72–89Google Scholar
  2. 2.
    Kainer KU (2003) Magnesium—alloys and technologies. Wiley-VCM, USA, pp 1–22Google Scholar
  3. 3.
    Dieringa H et al (2007) In: Beales RS, Luo A, Neelameggham NR, Pekguleryuz MO (eds) Magnesium technology 2007. TMS, Warrendale, pp 3–8Google Scholar
  4. 4.
    Friedrich HE, Mordike BL (2006) Magnesium technology. Springer, USAGoogle Scholar
  5. 5.
    Utsunomiya H et al (2006) In: Luo A, Neelameggham NR, Beales RS (eds) Magnesium technology 2006. TMS, Warrendale, pp 201–204Google Scholar
  6. 6.
    Koike J, Kobayashi T, Mukai T, Watanabe H, Suzuki M, Maruyama K, Higashi K (2003) Acta Mater 51:2055CrossRefGoogle Scholar
  7. 7.
    Yoshida Y, Cisar L, Kamado S, Kojima Y (2003) Mater Trans 44:468CrossRefGoogle Scholar
  8. 8.
    Koh H et al (2007) Mater Trans 48:2023CrossRefGoogle Scholar
  9. 9.
    Kato K, Saito Y, Sakai T (1984) Trans ISIJ 24:1050CrossRefGoogle Scholar
  10. 10.
    Sakai T, Saito Y, Hirano K, Kato K (1988) Trans ISIJ 28:1028CrossRefGoogle Scholar
  11. 11.
    Li H, Hsu E, Szpunar J, Verma R, Carter JT (2007) J Mater Eng Perform 16:321CrossRefGoogle Scholar
  12. 12.
    Lebensohn RA, Tome CN (1993) Acta Metall 41:2611CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Hualong Li
    • 1
  • Emilie Hsu
    • 1
  • Jerzy Szpunar
    • 1
    Email author
  • Hiroshi Utsunomiya
    • 2
  • Tetsuo Sakai
    • 2
  1. 1.Department of Materials EngineeringMcGill UniversityMontrealCanada
  2. 2.Division of Materials and Manufacturing ScienceGraduate School of Engineering, Osaka UniversitySuitaJapan

Personalised recommendations