Influence of texture on the recrystallization mechanisms in an AZ31 Mg sheet alloy at dynamic rates

Abstract An AZ31 rolled sheet alloy has been tested at dynamic strain rates ( e ˙ ∼ 10 3  s − 1 ) at 250 °C up to various intermediate strains before failure in order to investigate the predominant deformation and restoration mechanisms. In particular, tests have been carried out in compression along the rolling direction (RD), in tension along the RD and in compression along the normal direction (ND). It has been found that dynamic recrystallization (DRX) takes place despite the limited diffusion taking place under the high strain rates investigated. The DRX mechanisms and kinetics depend on the operative deformation mechanisms and thus vary for different loading modes (tension, compression) as well as for different relative orientations between the loading axis and the c-axes of the grains. In particular, DRX is enhanced by the operation of 〈c + a〉 slip, since cross-slip and climb take place more readily than for other slip systems, and thus the formation of high angle boundaries is easier. DRX is also clearly promoted by twinning.

[1]  M. E. Kassner,et al.  Current issues in recrystallization: a review , 1997 .

[2]  M. Pérez-Prado,et al.  Texture evolution during large-strain hot rolling of the Mg AZ61 alloy , 2003 .

[3]  N. Stanford,et al.  Deformation mechanisms and plastic anisotropy in magnesium alloy AZ31 , 2011 .

[4]  S. Agnew,et al.  Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B , 2005 .

[5]  Yujie Wei,et al.  Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation , 2011 .

[6]  S. Zaefferer,et al.  Twinning-related microstructural evolution during hot rolling and subsequent annealing of pure magnesium , 2009 .

[7]  J. Driver,et al.  Temperature dependency of slip and twinning in plane strain compressed magnesium single crystals , 2011 .

[8]  S. Kang,et al.  Low-temperature dynamic recrystallization occurring at a high deformation temperature during hot compression of twin-roll-cast Mg–5.51Zn–0.49Zr alloy , 2009 .

[9]  M. Barnett.  A taylor model based description of the proof stress of magnesium AZ31 during hot working , 2003 .

[10]  G. Gottstein,et al.  Dynamic recrystallization during high temperature deformation of magnesium , 2008 .

[11]  X. Li,et al.  Orientation dependent slip and twinning during compression and tension of strongly textured magnesium AZ31 alloy , 2010 .

[12]  T. Sakai,et al.  Dynamic Recrystallization Based on Twinning in Coarse-Grained Mg , 2003 .

[13]  Hongge Yan,et al.  Effect of twinning and dynamic recrystallization on the high strain rate rolling process , 2010 .

[14]  D. Sun,et al.  Microstructural study of strain localization in hot compressed Mg–3Al–1Zn alloy , 2010 .

[15]  E. El-Magd,et al.  Influence of strain rate and temperature on the compressive ductility of AI, Mg and Ti alloys , 2003 .

[16]  P. Čížek,et al.  Deformation modes and anisotropy in magnesium alloy AZ31 , 2009 .

[17]  J. Bohlen,et al.  Mechanical anisotropy and deep drawing behaviour of AZ31 and ZE10 magnesium alloy sheets , 2010 .

[18]  O. Ruano,et al.  Separate contributions of texture and grain size on the creep mechanisms in a fine grained magnesium alloy , 2007 .

[19]  I. Hurtado,et al.  Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature , 2011 .

[20]  M. Tan,et al.  Dynamic continuous recrystallization characteristics in two stage deformation of Mg-3Al-1Zn alloy sheet , 2003 .

[21]  G. Gottstein,et al.  Correlation of plastic deformation and dynamic recrystallization in magnesium alloy ZK60 , 2001 .

[22]  C. Tomé,et al.  Evaluation of self-consistent polycrystal plasticity models for magnesium alloy AZ31B sheet , 2010 .

[23]  A. E. Smith.  Surface, interface and stacking fault energies of magnesium from first principles calculations , 2007 .

[24]  T. Mukai,et al.  High temperature compressive properties over a wide range of strain rates in an AZ31 magnesium alloy , 2005 .

[25]  H. Mcqueen,et al.  Twinning, dynamic recovery and recrystallization in hot worked Mg–Al–Zn alloy , 2002 .

[26]  L. Murr,et al.  Dynamic Recrystallization: The Dynamic Deformation Regime , 2007 .

[27]  M. Bamberger,et al.  Trends in the Development of New Mg Alloys , 2008 .

[28]  M. E. Kassner,et al.  Transmission Electron Microscopy Study of Strain-Induced Low- and High-Angle Boundary Development in Equal-Channel Angular-Pressed Commercially Pure Aluminum , 2008 .

[29]  M. Barnett,et al.  Influence of grain size on hot working stresses and microstructures in Mg-3Al-1Zn , 2004 .

[30]  Surya R. Kalidindi,et al.  Deformation twinning in AZ31: Influence on strain hardening and texture evolution , 2010 .

[31]  S. Zaefferer,et al.  Mechanical behaviour and microstructural evolution of magnesium alloy AZ31 in tension at different temperatures , 2006 .

[32]  F. J. Humphreys,et al.  Recrystallization and Related Annealing Phenomena , 1995 .

[33]  L. Zhen,et al.  Deformed microstructure and mechanical properties of AM60B magnesium alloy under hypervelocity impact at a velocity of 4 km s-1 , 2010 .

[34]  O. Ruano,et al.  Influence of texture on dynamic recrystallization and deformation mechanisms in rolled or ECAPed AZ31 magnesium alloy , 2008 .

[35]  C. Davies,et al.  Texture effect on microyielding of wrought magnesium alloy AZ31 , 2011 .

[36]  A. Pandey,et al.  Mechanical response and texture evolution of AZ31 alloy at large strains for different strain rates and temperatures , 2011 .

[37]  I. Hurtado,et al.  Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates , 2010 .

[38]  Peter D. Beggs,et al.  Magnesium alloy applications in automotive structures , 2008 .

[39]  K. Ishikawa,et al.  Effect of texture on high temperature deformation behavior at high strain rates in a Mg–3Al–1Zn alloy , 2009 .

[40]  B. Mordike,et al.  Magnesium: Properties — applications — potential , 2001 .

[41]  T. Mukai,et al.  High strain rate deformation behavior of an AZ91 magnesium alloy at elevated temperatures , 2005 .

[42]  M. Barnett.  Influence of deformation conditions and texture on the high temperature flow stress of magnesium AZ31 , 2001 .

[43]  W. Ding,et al.  A systematic investigation of stacking faults in magnesium via first-principles calculation , 2009 .

[44]  J. Jonas,et al.  Evolution of microstructure and microtexture during the hot deformation of Mg–3% Al , 2010 .

[45]  F. J. Humphreys,et al.  Dynamic recrystallisation and the development of microstructure during the high temperature deformation of magnesium , 1982 .

[46]  R. Kaibyshev,et al.  Dynamic Recrystallization in Pure Magnesium , 2001 .

[47]  I. Hurtado,et al.  Tensile characterization and constitutive modeling of AZ31B magnesium alloy sheet over wide range of strain rates and temperatures , 2011 .