Abstract
Microstructure evolution, texture development and their influence on mechanical properties of Mg-10Gd-3Y-0.4Zr (wt.%) alloy processed by equal channel angular press (ECAP) at 450 °C were studied. The samples were prepared by ECAP from one to four passes. The results show that recrystallization preferentially occurred near the grain boundary, and the percentage of high-angle grain boundaries increases with the increase of passes. After four passes, the microstructure is still inhomogeneous, the fine and coarse grain zones exist simultaneously. It is attributed to the higher extrusion temperature; the grain grows and aggregates easily, which is confirmed through comparative experiment. The strength increases obviously after one pass, unexpectedly, it reduces slightly after two passes, the elongation is dramatically increased from 6.7% to 20.3%, which is due to the <0001> basal plane rotation from ED to the direction of flow strain and formation of a typical shear texture. The change of elongation and mechanical properties of this alloy during ECAP was discussed in terms of texture and the effect of the fine grain.
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References
B. L. Mordike, T. Ebert. “Magnesium: Properties-applications-potential.” Materials Science and Engineering A, 302(2001): 37–45.
K. Kubota, M. Mabuchi, K. Higashi. “The Grain Size and Texture Dependence of Tensile Properties in Extruded Mg-9AL-1Zn.” Journal of Materials Science, 34(1999): 2255–2262.
R. Zhu, Y.J. Wu, J.Q. Liu. “Microstructure and properties of Mg-12Gd-3Y-0.5Zr alloys processed by ECAP“. Journal of Wuhan University of technology -materials science edition, 6(2011): 1128–1132.
R.Z. Valiev, T.G. langdon, “Processing of a magnesium alloy by equal-channel angular pressing using a backpressure.” Materias Science and Engineering A, 527(2009):205–221.
W.J. Kim, Y.S. Kim, et al. “Mechanical properties and Microstructures of an AZ61 Mg alloy processed by equal channel angular pressing”. Scripta Materialla, 47 (2002): 39–44.
T. Mukai, M. Yamaoni, H. Wantabe, K. Higashi. “Ductility Enhancement in AZ31 Magnesium alloy by Controlling Its Grain Structure.” Scripta Materialla, 45(2001): 89–94.
A. Yamashita, Z. Hornito, T.G. Langdon. “Improving the Mechanical Properties of Magnesium and a Magnesium Alloy through Severe Plastic Deformation.” Materials Science and Engineering A, 300(2001): 142–147.
K. Matsubara, Y. Miyahara, Z. Horita, T.G. Langdon “Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP.” Acta Materialar, 2003, 51(11):3073–3084.
T. Mukai, M. Yamanoi, H.W. Watanabe, K. Higashi. “Low temperature superplasticity of a fine-grained ZK60 magnesium alloy processed by equal-channel-angular extrusion .” Scripta Materialar, 2001, 46(12):851–856.
W.J. Kimi, S.L. Hong, Y.S Kim, S.H. Min, H.T. Jeong. “Texture development and its effect on mechanical properties of an AZ61 Mg alloy fabricated by equal channel angular pressing.” Acta Materialar, 2003, 51(11):3293–3307.
D. Eddahbim, P. Monge, M.A. R. Garces, P. Adeva. “Microstructural characterization of an extruded Mg-Ni-Y-RE alloy processed by equal channel angular extrusion.” Journal of Alloys and Compounds, 2009,473(1–2):79–86.
G. Sha, J.H. Li, W. Xu, A.K. Xia, W.Q. Jie, S.P. Ringer. “Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg-Nd-Gd-Zn-Zr alloy”, Materials Science and Engineering A, 2010,527 (20):5092–5099.
B. Roberto, Figuiredo, Irene J. Beyerlein, Alexander P. Zhiyaev. “Evolution of texture in a magnesium alloy processed by ECAP through dies with different angles.” Materials Science and Engineering A, 527(2010): 1709–1718.
B. Benoit, S. Satyam, S. Laszlo. “Analysis of texture evolution in magnesium during equal channel angular extrusion.” Acta Materialar, 58(2008): 200–214
T. Liu, Y.D. Wang, S.D. Wu, et al. “Textures and Mechanical Behavior of Mg-3.3%Li Alloy after ECAP.” Scripta Materilar, 51(2004):1057–10617.
T. Obara, H. Yoshinga, S. Morozumi, “{11–12<1123>} slip system in magnesium.” Acta Materialar, 21 (1973): 845–853
J. Kioke, T. Kobayashi, T. Makai, H. Watanabe, M. Suzuki, “The activity of non-basal slip systems and dynamic recovery at room temperature in fine-grained AZ31B magnesium alloy.” Acta Materialar, 51(2003): 2055–2065.
F. Hehmann, F. Sommer, B. Predel. “Extension of solid Solubility in Magnesium by Rapid Solidification.” Materials Science and Engineering A, 125(1990):249–265.
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Zhou, Y., Li, D., Zeng, X., Wu, Y., Ding, W. (2014). Microstructure Evolution and Mechanical Behavior of Mg-10Gd-3Y-0.4Zr Alloy Processed by ECAP at High Temperature. In: Alderman, M., Manuel, M.V., Hort, N., Neelameggham, N.R. (eds) Magnesium Technology 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48231-6_92
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DOI: https://doi.org/10.1007/978-3-319-48231-6_92
Publisher Name: Springer, Cham
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