Abstract
The microstructure and mechanical properties of as-cast Mg–Ca–Y–Zr alloys with different Y contents were investigated. The alloy containing 0.5 wt% Y exhibited finer grains compared to the alloys with higher Y content. All alloys had a dendritic microstructure with eutectics composed of α-Mg and Ca-rich intermetallic phases. Few Mg–Y-rich intermetallic particles were also found along grain boundaries. EDS analysis showed that the solute Y segregated at dendritic and grain boundaries. The amount of Y contained in eutectics remarkably increased with increasing Y. In addition, the eutectics volume fractions of all alloys were comparable but the morphology became less continuous at higher Y contents. Both the room temperature tensile and compressive strengths were largely improved with increasing Y content. Moreover, the elevated temperature compression tests showed that the compressive yield strength first decreased slightly when the temperature rose to 175 °C, but then remained stable as the temperature increased.
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References
M. Sakamoto, S. Akiyama, K. Ogi, Suppression of Ignition and Burning of Molten Mg Alloys by Ca Bearing Stable Oxide Film, Journal of Materials Science Letters 16 (1997) 1048–1050.
B. Jing, S. Yangshan, X. Shan, X. Feng, Z. Tianbai, Microstructure and Tensile Creep Behavior of Mg–4Al Based Magnesium Alloys with Alkaline-Earth Elements Sr and Ca Additions, Materials Science and Engineering: A 419 (2006) 181–188.
N. Stanford, The Effect of Calcium on the Texture, Microstructure and Mechanical Properties of Extruded Mg–Mn–Ca Alloys, Materials Science and Engineering: A 528 (2010) 314–322.
C. Mendis, K. Oh-ishi, T. Ohkubo, K. Hono, Precipitation of Prismatic Plates in Mg–0.3Ca Alloys with In Additions, Scripta Materialia 64 (2011) 137–140.
B. Mordike, T. Ebert, Magnesium: Properties—Applications—Potential, Materials Science and Engineering: A 302 (2001) 37–45.
M. Suzuki, H. Sato, K. Maruyama, H. Oikawa, Creep Behavior and Deformation Microstructures of Mg–Y Alloys at 550 K, Materials Science and Engineering: A 252 (1998) 248–255.
H. Wang, Q.D. Wang, C.J. Boehlert, D.D. Yin, J. Yuan, Tensile and Compressive Creep Behavior of Extruded Mg–10Gd–3Y–0.5Zr (Wt.%) Alloy, Materials Characterization 99 (2015) 25–37.
N. Stanford, R. Cottam, B. Davis, J. Robson, Evaluating the Effect of Yttrium as a Solute Strengthener in Magnesium Using in Situ Neutron Diffraction, Acta Materialia 78 (2014) 1–13.
L. Gao, R.S. Chen, E.H. Han, Solid Solution Strengthening Behaviors in Binary Mg–Y Single Phase Alloys, Journal of Alloys and Compounds 472 (2009) 234–240.
L. Gao, R.S. Chen, E.H. Han, Effects of Rare-Earth Elements Gd and Y on the Solid Solution Strengthening of Mg Alloys, Journal of Alloys and Compounds 481 (2009) 379–384.
N. Zhou, Z.Y. Zhang, J. Dong, L. Jin, W.J. Ding, High Ductility of a Mg–Y–Ca Alloy Via Extrusion, Materials Science and Engineering: A 560 (2013) 103–110.
Y. Li, P.D. Hodgson, C.e. Wen, The Effects of Calcium and Yttrium Additions on the Microstructure, Mechanical Properties and Biocompatibility of Biodegradable Magnesium Alloys, Journal of materials science 46 (2011) 365–371.
F.R. Elsayed, N. Hort, M.A. Salgado Ordorica, K.U. Kainer, Magnesium Permanent Mold Castings Optimization, in: (Ed.), Materials Science Forum, Trans Tech Publ, 2011, pp. 65–68.
H.J. Fei, G.L. Xu, L.B. Liu, H. Bo, L.J. Zeng, C.P. Chen, Phase Equilibria in Mg-Rich Corner of Mg–Ca–RE (Re = Gd, Nd) Systems at 400 Degrees C, Transactions of Nonferrous Metals Society of China 23 (2013) 881–888.
Y. Murthy, Y. Zhang, M. Medraj, Experimental Determination of the Phase Equilibrium in the Mg–Ca–Y System, in: (Ed.), Materials Science & Technology 2013, pp. 1555–1563.
B. Kim, J. Jeon, K. Park, B. Park, Y. Park, I. Park, Microstructural Characterisation and Mechanical Properties of Mg–xSn–5Al–1Zn Alloys, International Journal of Cast Metals Research 21 (2008) 186–192.
C.H. Cáceres, W.J. Poole, A.L. Bowles, C.J. Davidson, Section Thickness, Macrohardness and Yield Strength in High-Pressure Diecast Magnesium Alloy AZ91, Materials Science and Engineering: A 402 (2005) 269–277.
Z. Yang, J. Li, Y. Guo, T. Liu, F. Xia, Z. Zeng, M. Liang, Precipitation Process and Effect on Mechanical Properties of Mg–9Gd–3Y–0.6Zn–0.5Zr Alloy, Materials Science and Engineering: A 454 (2007) 274–280.
N. Ono, R. Nowak, S. Miura, Effect of Deformation Temperature on Hall–Petch Relationship Registered for Polycrystalline Magnesium, Materials Letters 58 (2004) 39–43.
N. Balasubramani, U.T.S. Pillai, B.C. Pai, Optimization of Heat Treatment Parameters in ZA84 Magnesium Alloy, Journal of Alloys and Compounds 457 (2008) 118–123.
Acknowledgements
The authors are thankful to Mr. G. Meister of MagIC at Helmholtz-Zentrum Geesthacht for technical support. One of the authors (S. You) acknowledges the financial support from China Scholarship Council (CSC).
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You, S., Huang, Y., Kainer, K.U., Hort, N. (2018). Influences of Yttrium Content on Microstructure and Mechanical Properties of as-cast Mg–Ca–Y–Zr Alloys. In: Orlov, D., Joshi, V., Solanki, K., Neelameggham, N. (eds) Magnesium Technology 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72332-7_15
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DOI: https://doi.org/10.1007/978-3-319-72332-7_15
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