Abstract
The microstructure and properties of a quarternary Mg-8Er-5Zn-0.5Zr (mass fraction, %) alloy with the low Er/Zn mass ratio of 1.60 were investigated. It is found that despite of the low Er/Zn mass ratio, the microstructure of the as-prepared alloy is composed of α-Mg, W phase with face-centered cubic structure and long packed stacking ordered (LPSO) phase. As expected, the extruded and annealed alloy possesses high yield stress (310 MPa) and good elongation (14%) at room temperature. The superior mechanical properties can be interpreted in terms of the promising microstructure characteristic of fine a-Mg recrystallized grains embedded with high-density fine lamellar-shaped LPSO phase and block W phase structure.
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References
XU D K, HAN E H. Effects of icosahedral phase formation on the microstructure and mechanical improvement of Mg alloys: A review [J]. Progress in Natural Science: Materials International, 2012, 22: 364–385.
XU D K, LIU L, XU Y B, HAN E H. The fatigue behavior of I-phase containing as-cast Mg–Zn–Y–Zr alloy [J]. Acta Materialia, 2008, 5: 985–994.
LUO Z P, ZHANG S Q, TANG Y L, ZHAO D S. Quasicrystals in as-cast Mg–Zn–RE alloys [J]. Scripta Metall Mater, 1993, 28: 1513–1518.
BAE D H, KIM S H, KIM D H, KIM W T. Deformation behavior of Mg–Zn–Y alloys reinforced by icosahedral quasicrystalline particles [J]. Acta Mater, 2002, 50: 2343–2353.
NIIKURA A, TSAI A P, INOUE A, MASUMOTO A T. Stable Zn–Mg-Rare-Earth face-centered icosahedral alloys with pentagonal dodecahedral solidification structure [J]. Philos Mag Lett, 1994, 69: 351–357.
ZHANG L, LIU C M, WAN Y C, YANG P W, SHU X. Microstructures and mechanical properties of Mg–10Gd–6Y–2Zn–0.6Zr (wt.%) alloy [J]. Journal of Alloys and Compounds, 2011, 509: 8832–8839.
SHAO X H, YANG Z Q, MA X L. Strengthening and toughening mechanisms in Mg–Zn–Y alloy with a long period stacking ordered structure [J]. Acta Materialia, 2010, 14: 4760–4770.
LIU H, XUE F, BAI J, SUN Y S. Effect of heat treatments on the microstructure and mechanical properties of an extruded Mg95.5Y3Zn1.5 alloy [J]. Materials Science and Engineering A, 2013, 585: 261–267.
LI J H, DU W B, LI S B, WANG Z H. Icosahedral quasicrystalline phase in an as-cast Mg-Zn-Er alloy [J]. Rare Metals, 2009, 28: 297–301.
ZHANG Y, ZHENG X, LIU L, ZHOU H, LI Q, ZHU Y. Microstructure evolution of Mg-4.3Zn-0.7Y-0.6Zr alloy during solution heat treatment [J]. Materials Science and Engineering A, 2004, 373: 320–325.
YANG Wen-peng, GUO Xue-feng. High strength magnesium alloy with α-Mg and W phase processed by hot extrusion [J]. Transactions of Nonferrous Metals Society of China, 2011, 21(11): 2358–2364.
LI H, DU W B, LI S B, WANG Z H. Effect of Zr/Er weight ratio phase formation and mechanical properties of as-cast Mg-Zn-Er alloys [J]. Materials and Design, 2012, 35: 259–265.
WANG Q F, LIU K, WANG Z H, LI S B, DU W B. Microstructure, texture and mechanical properties of as-extruded Mg-Zn-Er alloys containing W phase [J]. Journal of Alloys and Compounds, 2014, 602: 32–39.
WANG J F, SONG P F, ZHOU Z E, HUANG X F, PAN F S. Influence of the morphology of long-period stacking ordered phase on the mechanical properties of as-extruded Mg–5Zn–5Y–0.6Zr magnesium alloy [J]. Materials Science & Engineering A, 2012, 556: 68–75.
ZHANG J S, ZHANG W B, RUAN X Q, BIAN L P, CHENG W L, WANG H X, XU C X. Effect of zirconium on the microstructure and mechanical properties of long period stacking ordered Mg96Gd3Zn1 alloy [J]. Materials Science and Engineering A, 2013, 560: 847–850.
DU X H, HONG M, DUAN G S, WANG D P, WU B L, ZHANG Y D, ESLING C. Effect of V on the microstructure and mechanical properties of Mg-10Er-2Cu alloy with a long period stacking ordered structure [J]. Materials Letters, 2014, 122: 312–314.
GONG X, KANG S B, CHO J H, LI S. Effect of annealing on microstructure and mechanical properties of ZK60 magnesium alloy sheets processed by twin-roll cast and differential speed rolling [J]. Materials Characterization, 2014, 97: 183–188.
GONG X, KANG S B, LI S, CHO J H. Enhanced plasticity of twin-roll cast ZK60 magnesium alloy through differential speed rolling [J]. Materials and Design, 2009, 30(9): 3345–3350.
LIU K, ZHANG J, LU H, TANG D, ROKHLIN LL. Effect of the long periodic stacking structure and W-phase on the microstructures and mechanical properties of the Mg–8Gd–xZn–0.4Zr alloys [J]. Materials and Design, 2010, 31: 210–219.
HOU X, PENG Q, CAO Z, XU S, KAMADO S, WANG L. Structure and mechanical properties of extruded Mg–Gd based alloy sheet [J]. Materials Science and Engineering A, 2009, 520: 162–167.
ROKHLIN L L. Magnesium alloys containing rare earth metals–structure and properties [M]. London: Taylor & Francis, 2003: 210–223.
LIU K, ROKHLIN L L, ELKIN F M, TANG D, MENG J. Effect of ageing treatment on the microstructures and mechanical properties of the extruded Mg–7Y–4Gd–1.5Zn–0.4Zr alloy [J]. Materials Science and Engineering A, 2010, 527: 828–834.
LIU X B, CHEN R S, HAN E H. Effects of ageing treatment on microstructures and properties of Mg–Gd–Y–Zr alloys with and without Zn additions [J]. Journal of Alloys and Compounds, 2008, 465: 232–238.
ZHENG L, LIU C, WAN Y, YANG P, SHU X. Microstructures and mechanical properties of Mg–10Gd–6Y–2Zn–0.6Zr (wt.%) alloy [J]. Journal of Alloys and Compounds, 2011, 509: 8832–8839.
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Foundation item: Project(51171120) supported by the National Natural Science Foundation of China
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Du, Xh., Wei, Cb., Wu, Bl. et al. A high-performance Mg-Er-Zn-Zr alloy with low Er/Zn mass ratio. J. Cent. South Univ. 22, 4123–4127 (2015). https://doi.org/10.1007/s11771-015-2958-z
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DOI: https://doi.org/10.1007/s11771-015-2958-z