Abstract
The as-cast Mg-9Li-3Al-2.5Sr alloy ingots were prepared and the extrusion of as-cast Mg-9Li-3Al-2.5Sr alloy ingots was carried out at 573 K (300 °C) with different extrusion ratio. The microstructure evolution during extrusion and the mechanical response of the extruded Mg-9Li-3Al-2.5Sr alloy are discussed and reported. The results show that both as-cast and extruded Mg-9Li-3Al-2.5Sr alloys contain h.c.p. α-Mg, b.c.c. β-Li and Al4Sr phase. With the increase of extrusion ratio, deformation induced phase transformation may occur and part of h.c.p. α-Mg phase transforms into b.c.c. β-Li phase during the extrusion. The strength of Mg-9Li-3Al-2.5Sr alloys decreases whereas ductility increases with the increasing extrusion ratio as a result of phase transformation.
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H. W. Dong, Y.M Wu, and L.M Wang , “Effect of Y on microstructure and mechanical properties of duplex Mg-7Li alloys,” Journal of Alloys and Compounds, 506 (2010), 468–474.
M. Pekguleryuz, M. Celikin, M. Hoseini, A. Becerra, and L. Mackenzie, “Study on edge cracking and texture evolution during 150 degrees C rolling of magnesium alloys: The effects of axial ratio and grain size,” Journal of Alloys and Compounds, 510(2012), 15–25.
H. Takuda, S. Kikuchi, T. Tsukada, et al, “Effect of strain rate on deformation behaviour of a Mg-8.5Li-1Zn alloy sheet at room temperature,” Materials Science and Engineering A, A271(1999), 251–256.
M.L. Zhang, R.Z. Wu, and T. Wang, “Microstructure and mechanical properties of Mg-8Li-(0–3)Ce alloys,” Journal of Materials Science, 44(2009), 1237–1240.
F. W. Bach, M. Schaper, and C. Jaschik, “Influence of lithium on hcp magnesium alloys,” Materials Science Forum, 419–422(2003), 1037–1042.
B. Liu, M. L. Zhang, and R.Z. Wu, “Effects of Nd on microstructure and mechanical properties of as-cast LA141 alloys,” Materials Science and Engineering A, 487(2008), 347–351.
M.J. Phasha, P.E. Ngoepe, H.R. Chauke, D.G. Pettifor, D. Nguyen-Mann, “Link between structural and mechanical stability of fcc- and bcc-based ordered Mg-Li alloy,” Intermetallics, 18(2010), 2083–2089.
H. Y. Wu, Z. W. Gao, J.Y Lin, and C.H. Chiu, “Effects of minor scandium addition on the properties of Mg-Li-Al-Zn alloy,” Journal of Alloys and Compounds, 474(2009), 158–163.
T. C. Chang, J. Y Wang, CL. Chu, and S. Lee, “Mechanical properties and microstructures of various Mg-Li alloys,” Materials Letters, 60(2006), 3272–3276.
Y. Yang, X.D. Peng, H.M. Wen, et al, “Influence of Extrusion on the Microstructure and Mechanical Behavior of Mg-9Li-3Al-xSr Alloys,” Metallurgical and Materials Transactions A, 44(2013), 1101–1113.
X. R. Meng, R. Z. Wu, M. L. Zhang, L. B. Wu, C. L. Cui, “Microstructures and properties of superlight Mg-Li-Al-Zn wrought alloys,” Journal of Alloys and Compounds, 486(2009), 722–725.
A. K. De, J. G. Speer, D. K. Matlock, et al, “Deformation-induced phase transformation and strain hardening in type 304 austenitic stainless steel,” Metallurgical and Materials Transactions A, 37A (2006), 1875–1886.
S. Ohhashi, A. Kato, M. Demura, AP. Tsai, “Textures and mechanical properties in rare-earth free quasicrystal reinforced Mg-Zn-Zr alloys prepared by extrusion,” Materials Science and Engineering A, 528 (2011), 5871–587.
C.W. Yang, T.S. Lui, L.H. Chen, H.E. Hung, “Tensile mechanical properties and failure behaviors with the ductile-to-brittle transition effect of α+β-type Mg-Li-Al-Zn alloy,” Scr. Mater. 61(2009), 1141–1144.
T. H. Courtney, Mechanical behavior of materials, second ed., 2000.
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Yang, Y., Peng, X., Xie, W., Wei, G. (2013). Influence of Extrusion Ratio on Microstructure and Mechanical Behavior of MG-9LI-3AL-2.5SR Alloy. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_132
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DOI: https://doi.org/10.1007/978-3-319-48764-9_132
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48586-7
Online ISBN: 978-3-319-48764-9
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