Recently, the 10-12 twin variants activated during dynamic plastic deformation (DPD) of Mg alloy have been investigated by analyzing their Schmid factors (SFs), and their contributions to deformation have been calculated. During DPD of Mg–3%Al–1%Zn alloy, different 10-12 variants are generated relative to their SFs when initial grains have defined orientations with one a-axis of the crystal lattice at roughly 0 or 30° from the compression direction. The volume fraction of twins deeply influences the strain accommodated by twinning. The 10-12 variant pair with the maximum SF accommodated about 90% of the twinning strain. Its high volume fraction indicated that both nucleation and growth mechanisms played important roles in the strain accommodation. Other 10-12 variants had a lower volume fraction and accommodated twinning strain mainly by twin nucleation and made a lesser contribution to the total deformation.
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M.R. Barnett: Twinning and the ductility of magnesium alloys: Part I: “Tension” twins. Mater. Sci. Eng. A 464, 1 (2007).
M.R. Barnett: Twinning and the ductility of magnesium alloys: Part II: “Contraction” twins. Mater. Sci. Eng. A 464, 8 (2007).
M.H. Yoo: Slip, twinning, and fracture in hexagonal close-packed metals. Mater. Trans. A 12, 409 (1981).
L. Jiang, J.J. Jonas, R.K. Mishra, A.A. Luo, A.K. Sachdev, and S. Godet: Twinning and texture development in two Mg alloys subjected to loading along three different strain paths. Acta Mater. 55, 3899 (2007).
J.W. Christian and S. Mahajan: Deformation twinning. Prog. Mater. Sci. 39, 1 (1995).
H. Somekawa, K. Hirai, H. Watanabe, Y. Takigawa, and K. Higashi: Dislocation creep behavior in Mg–Al–Zn alloys. Mater. Sci. Eng. A 407, 53 (2005).
M.R. Barnett, Z. Keshavarz, A.G. Beer, and D. Atwell: Influence of grain size on the compressive deformation of wrought Mg–3Al–1Zn. Acta Mater. 52, 5093 (2004).
M.R. Barnett, Z. Keshavarz, and X. Ma: A semianalytical sachs model for the flow stress of a magnesium alloy. Mater. Trans. A 37, 2283 (2006).
L. Jiang, J.J. Jonas, A.A. Luo, A.K. Sachdev, and S. Godet: Influence of 10-12 extension twinning on the flow behavior of AZ31 Mg alloy. Mater. Sci. Eng. A 445, 302 (2007).
S. Godet, L. Jiang, A.A. Luo, and J.J. Jonas: Use of Schmid factors to select extension twin variants in extruded magnesium alloy tubes. Scr. Mater. 55, 1055 (2006).
L. Jiang, J.J. Jonas, A.A. Luo, A.K. Sachdev, and S. Godet: Twinning-induced softening in polycrystalline AM30 Mg alloy at moderate temperatures. Scr. Mater. 54, 771 (2006).
J. Jiang, A. Godfrey, W. Liu, and Q. Liu: Identification and analysis of twinning variants during compression of a Mg–Al–Zn alloy. Scr. Mater. 58, 122 (2008).
S.H. Park, S.G. Hong, and C.S. Lee: Activation mode dependent 10-12 twinning characteristics in a polycrystalline magnesium alloy. Scr. Mater. 62, 202 (2010).
B. Clausen, C.N. Tome, D.W. Brown, and S.R. Agnew: Reorientation and stress relaxation due to twinning: Modeling and experimental characterization for Mg. Acta Mater. 56, 2456 (2008).
M. Knezevic, A. Levinson, R. Harries, R.K. Mishra, R.D. Doherty, and S.R. Kalidindi: Deformation twinning in AZ31: Influence on strain hardening and texture evolution. Acta Mater. 58, 6230 (2010).
A.A. Salem, S.R. Kalidindi, R.D. Doherty, and S.L. Semiatin: Strain hardening due to deformation twinning in alpha-titanium: Mechanisms. Metall. Mater. Trans. A 37, 259 (2006).
S.G. Hong, S.H. Park, and C.S. Lee: Strain path dependence of 10-12 twinning activity in a polycrystalline magnesium alloy. Scr. Mater. 64, 145 (2011).
S.G. Hong, S.H. Park, and C.S. Lee: Role of 10–12 twinning characteristics in the deformation behavior of a polycrystalline magnesium alloy. Acta Mater. 58, 5873 (2010).
N.V. Dudamell, I. Ulacia, F. Gálvez, S. Yi, J. Bohlen, D. Letzig, I. Hurtado, and M.T. Pérez-Prado: Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature. Acta Mater. 59, 6949 (2011).
M.A. Meyers, O. Vohringer, and V.A. Lubarda: The onset of twinning in metals: A constitutive description. Acta Mater. 49, 4025 (2001).
L. Capolungo, P.E. Marshall, R.J. McCabe, I.J. Beyerlein, and C.N. Tomé: Nucleation and growth of twins in Zr: A statistical study. Acta Mater. 57, 6047 (2009).
I. Ulacia, N.V. Dudamell, F. Gálvez, S. Yi, M.T. Pérez-Prado, and I. Hurtado: Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates. Acta Mater. 58, 2988 (2010).
This work was supported by National Natural Science Foundation of China (Grant Nos. 51071183, 50890170, and 51271208) and the Fundamental Research Funds for the Central Universities (Grant No. CDJXS11132225).
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Lou, C., Zhang, X., Duan, G. et al. Characteristics of different 10-12 twin variants in magnesium alloy during room temperature dynamic plastic deformation. Journal of Materials Research 28, 1885–1890 (2013). https://doi.org/10.1557/jmr.2013.162