High Temperature Deformation Flow Of A ZK60A Magnesium Alloy After Extrusion

• Autorzy: Kawasaki M. , Lee H. J. , Oh M. C. , Ahn B.

Identyfikatory

DOI

10.1515/amm-2015-0124

Warianty tytułu

PL

Płynięcie stopu magnezu ZK60A podczas wysokotemperaturowego odkształcenia w trakcie wytłaczania

• Języki publikacji: EN

Abstrakty

EN

Flow behavior of a ZK60A magnesium alloy after continuous casting and subsequent extrusion was examined in tension at a range of strain rates of 3.0×10^-6 − 1.0×10^-2 s^-1 at temperatures of 473-623K. The results demonstrated that the alloy exhibited a maximum elongation of ~250% at 523K when tested at an initial strain rate of 1.0×10^-5 s^-1 and strain rate sensitivity, m, of ~0.3-0.4 and the activation energy of ~94 kJ/mol were calculated under the testing conditions. The detailed investigation suggested that the high temperature flow of the ZK60A alloy having submicrometer grains demonstrates quasi-superplastic flow behavior controlled by a dislocation viscous glide process.

Słowa kluczowe

EN

activation energy; extrusion; flow mechanics; magnesium alloy; tensile property

PL

energia aktywacji; wytłaczanie; mechanika przepływu; stop magnezu; rozciąganie

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 2B
• Strony: 1327--1330
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Kawasaki M.

• Division of Materials Science and Engineering, Hanyang University, Seoul, Korea

autor

Lee H. J.

• Division of Materials Science and Engineering, Hanyang University, Seoul, Korea

autor

Oh M. C.

• Department of Energy Systems Research, Ajou University, Suwon, Korea

autor

Ahn B.

• Department of Energy Systems Research, Ajou University, Suwon, Korea

Bibliografia

• [1] K. Kubota, M. Mabuchi, K. Higashi, Journal of Materials Science 34, 2255-2262 (1999).
• [2] A. A. Lou, JOM 54, 42-48 (2002).
• [3] J. G. Kim, H. S. Choi, T. S. Kim, Journal of Korean Powder Metallurgy Institute 16, 438-441 (2009).
• [4] J. K. Lee, T. S. Kim, J. C. Bae, Journal of Korean Powder Metallurgy Institute 14, 140-144 (2007).
• [5] T. G. Langdon, Journal of Materials Science 44, 5998-6010 (2009).
• [6] T. G. Langdon, Metallurgical and Materials Transactions A 13, 689-701 (1982).
• [7] D. A. Woodford, Transactions of the American Society of Metals 62, 291-293 (1969).
• [8] T. G. Langdon, Scripta Metallurgica 11, 997-1000 (1977).
• [9] H. J. Frost, M. F. Ashby, Deformation-Mechanism maps, Pergamon Press, UK (1982).
• [10] O. D. Sherby, P. M. Burke, Progress in Materials Science 13, 323-390 (1968).
• [11] J. E. Bird, A. K. Mukherjee, J. E. Dorn, D. G. Brandon, A. Rosen, Correlations between high-temperature creep behavior and structure, Quantitative relation between properties and microstructure, Israel Universities Press, Jerusalem (1969).
• [12] W. R. Cannon, O. D. Sherby, Metallurgical Transactions 1, 1030-1032 (1970).
• [13] P. Yavari, T. G. Langdon, Acta Metallurgica 30, 2181-2196 (1982).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.