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Casting Process and Mechanical Properties of Large-Scale Extruded Mg-Zn-Y Alloys
Technical Paper
2013-01-0979
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In order to develop large-scale (100 mm in diameter) Mg-Zn-Y alloys with high strength beyond that of 4032-T6 alloy, we considered a novel casting process to produce large ingots with homogeneous microstructure, and investigated the mechanical properties of the extruded alloys. First, ingots (335 mm in diameter and 850 mm in height) were produced by a novel stir casting process in the ingot case. Then large-scale extruded alloys (100 mm in diameter) were prepared with an extrusion ratio of 10. The Mg-Zn-Y alloys exhibited higher yield and fatigue strengths than those of 4032-T6 aluminum alloy. The yield strengths of the aluminum alloy decreased drastically above 473 K, whereas those of the Mg-Zn-Y alloys did not. It is noteworthy that the yield strength (274 MPa) and fatigue strength (100 MPa) of the Mg-Zn-Y alloys at 473 K were about 1.3 and 1.2 times respectively as high as those of aluminum alloys. Moreover, creep strengths were equivalent to or higher than those of aluminum alloys. From the results above, we verified that even large-scale extruded Mg-Zn-Y alloys have higher strength than those of heat-resistant aluminum alloys. In terms of physical properties, the material is low-density, with a density approximately 70% that of an aluminum alloy. In addition, its thermal conductivity, an issue when a material is used in components, was higher than those of commercial magnesium alloys (AZ91D, WE54 et al.), and close to those of commercial aluminum alloys. We expect that Mg-Zn-Y alloys will be utilized in the heat-resistant automobile and motorcycle components category.
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Citation
Ienaga, Y., Inoue, K., Uesugi, T., and Higashi, K., "Casting Process and Mechanical Properties of Large-Scale Extruded Mg-Zn-Y Alloys," SAE Technical Paper 2013-01-0979, 2013, https://doi.org/10.4271/2013-01-0979.Also In
References
- Yasi , J.A. , Hector , L.G. Jr , and Trinkle , D.R. First-Principles Data for Solid-Solution Strengthening of Magnesium: From Geometry and Chemistry to Properties Acta Mater. 58 5704 5713 2010
- Yasi , J.A. , Hector , L.G. Jr , and Trinkle , D.R. Prediction of Thermal Cross-slip Stress in Magnesium Alloys from Direct First Principles Data Acta Mater. 59 5652 5660 2011
- Yasi , J.A. , Hector , L.G. Jr , and Trinkle , D.R. Prediction of Thermal Cross-slip in Magnesium Alloys from a Geometric Interaction Model Acta Mater. 60 2350 2358 2012
- Kawamura , Y. , Hayashi , K. , Inoue , A. , and Masumoto , T. Rapidly solidified powder metallurgy Mg97Zn1Y2 alloys with excellent tensile yield strength above 600 MPa Mater. Trans. 42 1172 1176 2001
- Abe , E. , Kawamura , Y. , Hayashi , K. , and Inoue , A. Long-period ordered structure in a high-strength Acta Mater. 50 3845 3857 2002
- Yamasaki , M. , Anan , T. , Yoshimoto , S. , and Kawamura , Y. Mechanical properties of warm-extruded Mg-Zn-Gd alloy with coherent 14H long periodic stacking ordered structure precipitate Scripta Mater. 53 799 2005
- Yoshimoto , S. , Yamasaki , M. and Kawamura , Y. Microstructure and Mechanical Properties of Extruded Mg-Zn-Y Alloys with 14H Long Period Ordered Structure Mater. Trans. 47 959 965 2006
- Kawamura , Y. , Kasahara , T. , Izumi , S. , and Yamasaki , M. Elevated temperature Mg97Y2Cu1 alloy with long period ordered structure Scripta Mater. 55 453 456 2006
- Yamasaki , M. , Sasaki , M. , Nishijima , M. , Hiraga , K. , and Kawamura , Y. Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature Acta Mater. 55 6798 6805 2007
- Shao , X.H. , Yang , Z.Q. , and Ma , X.L. Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure Acta Mater. 58 4760 4771 2010
- Yamasaki , M. , Hashimoto , K. , Hagihara , K. , and Kawamura , Y. Effect of multimodal microstructure evolution on mechanical properties of Mg-Zn-Y extruded alloy Acta Mater. 59 3646 3658 2011
- Zhu , Y.M. , Morton , A.J. , and Nie , J.F. The 18R and 14H long-period stacking ordered structures in Mg-Y-Zn alloys Acta Mater. 58 2936 2947 2010
- Ienaga , Y. , Inoue , K. , and Kawamura , Y. Mechanical properties of large-scale extruded Mg-Zn-Y alloys Proceedings of the 110th Conference of Japan Institute of Light Metals 145 146 2006
- Ienaga , Y. Mechanical properties of large-scale extruded Mg-Zn-Y alloys Material Science Forum 638-642 1541 1546 2010
- Krajewski , P.E. , Hector , L.G. Jr , Du , N. , and Bower , A.F. Microstructure-Based Multi-Scale Modeling of Elevated Temperature Deformation in Aluminum Alloys Acta Mater. 58 1074 1086 2010
- Marya , M. , Hector , L.G. Jr , Verma , R. , and Tong , W. Microstructural Effects of AZ31 magnesium alloy on its Tensile Deformation and Failure Behaviors Mat. Sci. Eng. A 418 1-2 341 356 2006
- Ando , S. , Toda , K. , Tsushida , M. , Kitahara , H. , Tonda , H. , and Kawamura , Y. Fatigue Properties of Mg-Zn-Y Alloys with Long Period Ordered Structure J. Japan Inst. Metals 71 9 699 703 2007
- Fujii , H. , Oka , T. , Yoneyama , M. , Deguchi , T. , and Murakami , H. Development of Lightweight Forged Piston Material by Controlling Needle-type Intermetallic Compound Size Using Carbon Mold Continuous Casting Method HONDA R&D Technical Review 20 2 132 140 2008
- Shibata , A. , Suzuki , M. , and Maruyama , K. Effects of Eutectic Compounds Formed along Grain Boundaries in Thixomolded Alloy Mg 96 Zn 2 Y 2 on Creep Deformation Mater. Trans. 50 1426 1432 2009
- JIS Handbook Measurement methods of thermal diffusivity, specific heat capacity, and thermal conductivity for fine ceramics by flash method JIS Standard R 1611 Apr. 1997
- Yamasaki , M. , and Kawamura , Y. Thermal diffusivity and thermal conductivity of Mg-Zn-rare earth element alloys with long-period stacking ordered phase Scripta Mater. 60 264 267 2009