Abstract
The present article provides a short look at the strength of magnesium when twinning dominates the yielding behavior. The twin is approximated by a super dislocation to draw some tentative conclusions regarding the stresses required to: (1) thicken a twin to the aspect ratio observed experimentally, (2) propagate a twin over a grain, (3) thicken a twin within a stress concentration and (4) bow the propagating twinning front between particles. In all cases, relaxation of the twin stress field is important.
References
J. Friedel, Dislocations (Pergamon, Oxford, 1964)
R.A. Lebensohn, C.N. Tome, Philos. Mag. A 67, 187–206 (1993)
M.R. Barnett, N. Stanford, A. Ghaderi, F. Siska, Acta Mater. 61, 7859–7867 (2013)
J.P. Hirth, J. Lothe, Theory of Dislocations (Krieger, Florida, 1992)
M.R. Barnett, A. Ghaderi, J. Quinta Da Fonseca, J.D. Robson, Acta Mater. 80, 380–391 (2014)
A. Ghaderi, M.R. Barnett, Acta Mater. 59, 7824–7839 (2011)
J. Wang, I.J. Beyerlein, C.N. Tomé, Int. J. Plast. 56, 156–172 (2014)
S.R. Niezgoda, A.K. Kanjarla, I.J. Beyerlein, C.N. Tomé, Int. J. Plast. (2013)
J. Wang, I.J. Beyerlein, C.N. Tomé, Scripta Mater. 63, 741–746 (2010)
I.J. Beyerlein, C.N. Tome, Proc. R. Soc. A Math. Phys. Eng. Sci. 466, 2517–2544 (2010)
J. Wang, J.P. Hirth, C.N. Tomé, Acta Mater. 57, 5521–5530 (2009)
J. Jain, P. Cizek, W.J. Poole, M.R. Barnett, Mater. Sci. Eng. A 647, 66–73 (2015)
N. Stanford, M.R. Barnett, Mater. Sci. Eng. A 516, 226–234 (2009)
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© 2017 The Minerals, Metals & Materials Society
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Barnett, M.R. (2017). Twinning Super Dislocations to Help Understand Strength. In: Solanki, K., Orlov, D., Singh, A., Neelameggham, N. (eds) Magnesium Technology 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52392-7_22
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DOI: https://doi.org/10.1007/978-3-319-52392-7_22
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