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The Mg-Al-Ca Alloy System for Structural Applications at Elevated Temperatures
Technical Paper
2007-01-1025
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Solidification paths and phase stability have been investigated in the creep resistant Mg-Al-Ca based alloys for powertrain applications. The liquidus projection and isothermal sections of the Mg-Al-Ca ternary system were determined, including a ternary (Mg, Al)2Ca intermetallic compound. The solidification of the alloys in the α-Mg primary phase field involves L→α+(Mg, Al)2Ca eutectic reaction in a wide range of compositions and is terminated with invariant reactions that form Mg2Ca or Mg17Al12 phases. The (Mg, Al)2Ca is a high temperature phase and decomposes into Mg2Ca and Al2Ca phases between 773 and 673 K, but the transformation is kinetically quite slow at temperatures below 473 K. Based on this new knowledge, alloy modifications through quaternary elemental additions to improve the solid-solution strength and aging treatments to reinforce the α-Mg phase with precipitates have been demonstrated.
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Suzuki, A., Saddock, N., TerBush, J., Jones, J. et al., "The Mg-Al-Ca Alloy System for Structural Applications at Elevated Temperatures," SAE Technical Paper 2007-01-1025, 2007, https://doi.org/10.4271/2007-01-1025.Also In
References
- Das S. “Magnesium for Automotive Applications: Primary Production Cost Assessment,” JOM 55 11 2003 22 26
- Powell B.R. Ouiment L.J. Allison J.E. Hines J.A. Beals R.S. Kopka L. Ried P. “The Magnesium Powertrain Cast Components Project,” Magnesium Technology 2004 Luo A.A. Warrendale, PA TMS 2004 3 10
- Pekguleryuz M.O. Kaya A.A. “Creep Resistant Magnesium Alloys for Powertrain Applications,” Magnesium Alloys and Their Application Kainer K.U. Germany Willey-VCH Verlag GmbH 2003 74 93
- Luo A.A. “Recent Magnesium Alloy Development for Elevated Temperature Applications,” Intl. Mat. Rev. 49 2004 13 30
- Luo A.A. Balogh M.P. Powell B.R. “Creep and Microstructure of Magnesium-Aluminum-Calcium Based Alloys,” Metall. Mater. Trans. 33A 2002 567 574
- Pekguleryuz M.O Baril E. “Creep Resistant Magnesium Diecasting Alloys Based on Alkaline Earth Elements,” Materials Transactions 42 2001 1258 1267
- Baril E. Labelle P. Pekguleryuz M.O. “Elevated Temperature Mg-Al-Sr: Creep Resistance, Mechanical Properties, and Microstructure,” JOM 55 11 2003 34 39
- Bakke P. Westengen H. “The Role of Rare Earth Elements in Structure and Property Control of Magnesium Die-Casting Alloys,” Magnesium Technology 2005 Neelameggham N.R. Kaplan H.I. Powell B.R. Warrendale, PA TMS 2005 291 296
- Powell B.R. Luo A.A. Rezhets V. Tiwari B.L. “Development of Creep-Resistant Magnesium Alloys for Powertrain Applications: Part 1 of 2,” SAE Technical Paper No. 2001-01-0422 Warrendale, PA SAE 2001
- Luo A.A. Balogh M.P. Powell B.R. “Tensile Creep and Microstructure of Magnesium-Aluminium Calcium-Based Alloys for Powertrain Applications: Part 2 of 2,” SAE Technical Paper No. 2001-01-0423 Warrendale, PA SAE 2001
- Powell B.R. Luo A.A. Tiwari B.L. Rezhets V. “The Die Castability of Calcium-containing Magnesium Alloys: Thin Wall Computer Case,” Magnesium Technology 2002 Kaplan H.I. Warrendale, PA TMS 2002 123 129
- Cao G. Kou S. “Hot Tearing of Ternary Mg-Al-Ca Alloy Castings,” Metall. Mater. Trans. A
- Suzuki A. Saddock N.D. Jones J.W. Pollock T.M. “Structure and Transition of Eutectic (Mg, Al) 2 Ca Laves Phase in a Die-cast Mg-Al-Ca Base Alloy,” Scripta Mater 51 2004 1005 1010
- Suzuki A. Saddock N.D. Jones J.W. Pollock T.M. “Solidification Paths and Eutectic Intermentallic Phases in Mg-Al-Ca Ternary Alloys,” Acta Mater 53 2005 2823 2834
- Suzuki A. Saddock N.D. Jones J.W. Pollock T.M. “Phase Equilibria in the Mg-Al-Ca Ternary System at 773 and 673 K,” Metall. Mater. Trans. 37A 2006 975 983
- Suzuki A. Saddock N.D. Riester L. Lara-Curzio E. Jones J.W. Pollock T.M. “Effect of Sr Additions on the Microstructure and Strength of a Mg-Al-Ca Ternary Alloy,” Metall. Mater. Trans. A 2007
- Cao H. Shu J. Zhang C. Wu K. Saddock N.D. Jones J.W. Pollock T.M. Schmid-Fetzer R. Chang Y.A. “Experimental Investigation and Thermodynamic Modeling of the Mg-Al-rich Region of the Mg-Al-Sr System,” Z. Metallkde 97 2006 422 428
- Suzuki A. Saddock N.D. TerBush J.R. Powell B.R. Jones J.W. Pollock T.M. “Precipitation Strengthening of a Mg-Al-Ca Based Die-cast Alloy with Al 2 Ca Phase,” Magnesium Technology 2007 Beals R.S. Neelameggham N.R. Pekguleryuz M.O. TMS Warrendale, PA 2007
- Saddock N.D. Suzuki A. TerBush J.R. Heininger E.C. Zindel J. Allison J.E. Pollock T.M. Jones J.W. “Microstructure and Mechanical Properties of Permanent Mold Cast Mg-4Al-4(Ca, Ce, La, or Sr) Ternary Alloys,” Magnesium Technology 2006 Luo A.A. Neelameggham N.R. Beals R.S. TMS Warrendale, PA 2006 77 82
- Saddock N.D. Suzuki A. TerBush J.R. Pollock T.M. Jones J.W. “Creep Behavior of Permanent Mold Cast Mg-Al-Ca Based Alloys,” Magnesium Technology 2007 Beals R.S. Neelameggham N.R. Pekguleryuz M.O. TMS Warrendale, PA 2007
- Saddock N.D. Suzuki A. TerBush J.R. Zindel J. Allison J.E. Pollock T.M. Jones J.W. “Permanent Mold Casting and Creep Behavior of Mg - 4 Al - 4 X: (Ca, Ce, La, and Sr) Alloys,” SAE Technical Paper Warrendale, PA SAE 2007
- Amerioun S. Simak S.I. Haussermann U. “Laves-Phase Structural Changes in the System CaAl 2-x Mg x ,” Inorganic Chemistry 42 2003 1467 1474
- Groebner J. Kevorkov D. Chumak I. Schmid-Fetzer R. “Experimental Investigation and Thermodynamic Calculation of Ternary Al-Ca-Mg Phase Equilibria,” Z. Metallkde 94 2003 976 982
- Ozturk K. Zhong Y. Luo A.A. Liu Z.-K. “Creep Resistant Mg-Al-Ca Alloys: Computational Thermodynamics and Experimental Investigation,” JOM 55 11 2003 40 44
- Tkachenko V.G. Khoruzhaya V.G. Meleshevich K.A. Karpets M.V. Frizel V.V. “Phase Equilibria in the Mg-Al-Ca Syetem (Region 50-100 mass% Mg),” Powder Metallurgy and Metal Ceramics 42 2003 268 273
- Zhong Y. Luo A.A. Sofo J.O. Liu Z.-K. “Laves Phases in Mg-Al-Ca Alloys,” Magnesium Technology 2004 Luo A.A. Warrendale, PA TMS 2004 317 323
- Moreno I.P Nandy T.K. Jones J.W. Allison J.E. Pollock T.M. “Microstructural Stability and Creep of Rare-earth Containing Magnesium Alloys,” Scripta Mater. 48 2003 1029 1034
- Powell B.R. Rezhets V. Balogh M.P. Waldo R.A. “Microstructure and Creep Behavior in AE42 Magnesium Die-Casting Alloy,” JOM 54 8 2002 34 38
- Dargusch M.S. Dunlop G.L. “Elevated Temperature Creep and Microstructure of Die Cast Mg-Al Alloys,” Magnesium Alloys and Their Applications Mordike B.L. Kainer K.U. Frankfurt, Germany Werkstoff-Informationsgesellschaft 1988 277 282
- Mori Y. Terada Y. Sato T. “Microstructure Stablity and Creep Strength in a Die-cast AX52 Magnesium Alloy,” Materials Transactions 46 2005 1749 1752
- Hazzledine P.M. Pirouz P. “Synchroshear transformations in Laves phases,” Scripta Metall Mater. 28 1993 1277 1282
- Kumar K.S. Hazzledine P.M. “Polytypic transformation in Laves phases,” Intermetallics 12 2004 763 770
- Chisholm M.F. Kumar S. Hazzledine P. “Dislocations in Complex Materials,” Science 307 2005 701 703
- Schurmann E. Fischer A. “Melt Equilibrium in the Aluminum-Magnesium-Silicon Ternary System. III,” Giessereiforschung 29 1977 161 165
- Semenova E.M. “Phase Diagram of the Mg-Al-Sn Syetem in the Magnesium-rich Region,” Doklady Akad Nauk SSSR 188 1969 1308 1310
- Bol'shakov K.A. Fedrov P.I. Smarina E.I. Smirnova I.N. “The Al-Ga-Mg System,” Russian Journal of Inorganic Chemistry 9 1964 1020 1027
- Smola B. Stulikova I. Pelcova J. Mordike L. “Structure and Morphology of Effective Obstacles in High Performance Mg - Rare Earth Base Alloys,” Magnesium Alloys and Their Application Kainer K.U. Germany Willey-VCH Verlag GmbH 2003 43 47
- Nie J.F. “Precipitation and Strengthening in Selected Magnesium Alloy,” Magnesium Technology 2002 Kaplan H.I. Warrendale, PA TMS 2002 103 110
- Nie J.F. Muddle B.C. “Characterization of Strengthening Precipitate Phases in a Mg-Y-Nd Alloy,” Acta Mater. 48 2000 1691 1703
- Celotto S. “TEM Study of Continuous Precipitation in Mg-9wt%Al-1wt%Zn Alloy,” Acta Mater 48 2000 1775 1787