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Licensed Unlicensed Requires Authentication Published by De Gruyter June 11, 2013

Physical aspects of plastic deformation in Mg–Al alloys with Sr and Ca

  • Zuzanka Trojanová and Pavel Lukáč


Magnesium alloys of AJ (Mg – Al – Sr) and AX (Mg – Al – Ca) series were deformed at temperatures between room temperature and 300 °C. Stress relaxation tests were performed in order to reveal features of the thermally activated dislocation motion. The work hardening rate = d/d decreases with increasing stress and temperature. Analysis of the – plots revealed the hardening and softening mechanisms operating during the deformation. Internal and effective components of the applied stress have been estimated. Very high values of the internal stress estimated at lower temperatures decrease rapidly with increasing deformation temperature. The apparent activation volume decreases with increasing effective stress. The values of the activation volume as well as the activation enthalpy indicate that the main thermally activated process is most probably the glide of dislocations in non-compact planes.

* Correspondence address, Prof. RNDr. Zutanka Trojanová DrSc. Department of Physics of Materials Faculty of Mathematics and Physics Ke Karlovu, CZ-12116 Praha 2, Czech Republic Tel.: +420 221 911 357 Fax: +420 221 911 490 E-mail:


[1] M.Pekguleryuz, in: K.U.Kainer (Ed.), Magnesium Alloys and Their Applications, DGM, Willey-VCH, Weinhaim (2003) 6585.Search in Google Scholar

[2] M.A.Parvez, M.Medraj, E.Essadiqi, A.Muntasar, G.Dénes: J. Alloys Comp.402 (2005) 170185.10.1016/j.jallcom.2005.04.173Search in Google Scholar

[3] M.Kunst, A.Fischerworring-Bunk, U.Glatzel, G.L'Espérance, P.Plamodon, E.Baril, P.Labelle: Proc. of Inter. Symposium on Magnesium Technology in the Global Age. Canad. Inst. of Mining, Metallurgy and Petroleum, Montréal, Canada (2006) 647661.Search in Google Scholar

[4] E.Baril. P.Labelle, M.O.Pekguleryuz: JOM55 (2003) 3439.Search in Google Scholar

[5] A.Suzuki, N.D.Saddock, J.W.Jones, T.M.Pollock: Scripta Mater.51 (2004) 10051010.10.1016/j.scriptamat.2004.07.011Search in Google Scholar

[6] R.Ninomiya, T.Ojiro, K.Kubota: Acta Metall.43 (1995) 669674.10.1016/0956-7151(94)00269-NSearch in Google Scholar

[7] H.Gjestland, G.Nussbaum, G.Regazzoni, O.Lohne, Ø.Bauger: Mater. Sci. Eng. A134 (1991) 11971200.10.1016/0921-5093(91)90954-LSearch in Google Scholar

[8] Y.Terada, N.Ishimatsu, R.Sota, T.Sato, K.Ohori: Mater. Sci. Forum419–422 (2003) 459464.10.4028/ in Google Scholar

[9] D.Wenwen, S.Yangshan, M.Xuegang, X.Feng, Z.Min, W.Dengyun: Mater. Sci. Eng. A356 (2003) 17.10.1016/S0921-5093(02)00551-8Search in Google Scholar

[10] J.C.M.Li: Canad. J. Appl. Phys.45 (1967) 493509.10.1139/p67-043Search in Google Scholar

[11] R.De Batist, A.Callens: Phys. Stat. Sol. (a)21 (1974) 591595.10.1002/pssa.2210210223Search in Google Scholar

[12] V.I.Dotsenko: Phys. Stat. Sol. (b)93 (1979) 1143.10.1002/pssb.2220930102Search in Google Scholar

[13] P.Feltham: Phys. Stat. Sol.3 (1943) 13401346.10.1002/pssb.19630030805Search in Google Scholar

[14] U.F.Kocks: J. Eng. Mater. Tech.98 (1976) 7685.10.1115/1.3443340Search in Google Scholar

[15] Y.Estrin, H.Meching: Acta Metall.32 (1984) 577010.1016/0001-6160(84)90202-5Search in Google Scholar

[16] G.Gottstein, A.S.Argon: Acta Metall.35 (1987) 12611271.10.1016/0001-6160(87)90007-1Search in Google Scholar

[17] M.Zehetbauer: Acta Mater.41 (1993) 589599.10.1016/0956-7151(93)90089-BSearch in Google Scholar

[18] P.Lukáč, J.Balík: Key Eng. Mater.97-98 (1994), 307322.10.4028/ in Google Scholar

[19] K.Marthinsen, E.Nes: Mater. Sci. Eng. A234 (1997) 10951098.10.1016/S0921-5093(97)00349-3Search in Google Scholar

[20] K.MiličkaZ.Trojanová, P.Lukáč: Mater. Sci. Eng. A462 (2007) 215219.10.1016/j.msea.2005.11.080Search in Google Scholar

[21] U.F.Kocks, A.S.Argon, M.F.Ashby: Progr. Mater. Sci.19 (1975) 1288.10.1016/0079-6425(75)90005-5Search in Google Scholar

[22] K.Ono: J. Appl. Phys.39 (1968) 18031806.10.1063/1.1656434Search in Google Scholar

[23] R.Kapoor, S.L.Wadekar, J.K.Chakravartty: Mater. Sci. Eng. A328 (2002) 324333.10.1016/S0921-5093(01)01849-4Search in Google Scholar

[24] A.G.Evans, R.D.Rawlings: Phys. Stat. Sol.34 (1969) 931.10.1002/pssb.19690340102Search in Google Scholar

[25] A.Couret, D.Caillard: Acta metall.33 (1985) 14471454.10.1016/0001-6160(85)90045-8Search in Google Scholar

[26] A.Couret, D.Caillard: Acta metall.33 (1985) 14551462.10.1016/0001-6160(85)90046-XSearch in Google Scholar

[27] A.Amadieh, J.Mitchell, J.E.Dorn: Trans. AIME233 (1965) 1130.Search in Google Scholar

[28] J.Koike, R.Ohyama: Acta Mater.53 (2005) 19631972.10.1016/j.actamat.2005.01.008Search in Google Scholar

[29] K.Máthis, K.Nyilas, A.Axt, I.Dragomir-Cernatescu, T.Ungár, P.Lukáč: Acta Mater.52 (2004) 28892894.10.1016/j.actamat.2004.02.034Search in Google Scholar

[30] Z.Trojanová, P.Lukáč, K.Milička, Z.Száraz: Mater. Sci. Eng. A387 (2004) 8083.10.1016/j.msea.2004.01.068Search in Google Scholar

Received: 2008-10-8
Accepted: 2009-1-9
Published Online: 2013-06-11
Published in Print: 2009-03-01

© 2009, Carl Hanser Verlag, München

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