The effect of microstructure evolution on the elevated temperature mechanical properties in Mg-Sn-Ca system
作者： Do Hyung Kim , Ju Youn Lee , Hyun Kyu Lim , Joon Seok Kyeong , Won Tae Kim
DOI: 10.2320/MATERTRANS.MER2008140
关键词: Microstructure 、 Phase (matter) 、 Thermodynamics 、 Metallurgy 、 Materials science 、 Diffusion 、 Alloy 、 Grain boundary diffusion coefficient 、 Creep 、 Eutectic system 、 Activation energy
摘要: The effect of microstructural evolution on the creep properties in Mg-Sn-Ca system has been investigated. As-cast microstructure alloy consists two or three phases depending Ca/Sn ratio, i.e. Mg 2 Sn, CaMgSn and Ca phases. Ternary phase types morphology by its pseudo hyper-eutectic reaction with α-mg; coarse rod-like primary feather-like eutectic phase. Primary solidified exhibit negative tensile spite high thermal stability up to 500°C. According test results, apparent stress exponent value (n = 7) indicates climb controlled mechanism core diffusion above 150°C. Activation energy Mg-5Sn-2Ca (74 kJ/mol) is close grain boundary for pure magnesium, 92 kJ/mol. Creep resistance remarkably improved presence
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sci-hub.se 参考文章(15)
Magnesium alloys and technology Deutsche Gesellschaft für Materialkunde , Wiley-VCH. ,(2003) , 10.1002/3527602046
Paul Gordon, Principles of Phase Diagrams in Materials Systems ,(1968)
J. B. Clark, A. A. Nayeb-Hashemi, Phase diagrams of binary magnesium alloys ASM International. ,(1988)
Thomas H. Courtney, Mechanical Behavior of Materials ,(2009)
Marc Andre Meyers, Krishan Kumar Chawla, Mechanical Behavior of Materials Cambridge University Press. ,(2008) , 10.1017/CBO9780511810947
A Kozlov, M Ohno, R Arroyave, ZK Liu, R Schmid-Fetzer, None, Phase equilibria, thermodynamics and solidification microstructures of Mg–Sn–Ca alloys, Part 1: Experimental investigation and thermodynamic modeling of the ternary Mg–Sn–Ca system Intermetallics. ,vol. 16, pp. 299- 315 ,(2008) , 10.1016/J.INTERMET.2007.10.010
J.F. Nie, B.C. Muddle, Precipitation hardening of Mg-Ca(-Zn) alloys Scripta Materialia. ,vol. 37, pp. 1475- 1481 ,(1997) , 10.1016/S1359-6462(97)00294-7
A. Kozlov, M. Ohno, T. Abu Leil, N. Hort, K.U. Kainer, R. Schmid-Fetzer, Phase equilibria, thermodynamics and solidification microstructures of Mg–Sn–Ca alloys, Part 2: Prediction of phase formation in Mg-rich Mg–Sn–Ca cast alloys Intermetallics. ,vol. 16, pp. 316- 321 ,(2008) , 10.1016/J.INTERMET.2007.10.011
Yoshihiro Terada, Naoya Ishimatsu, Yukako Mori, Tatsuo Sato, Eutectic Phase Investigation in a Ca-added AM50 Magnesium Alloy Produced by Die Casting Materials Transactions. ,vol. 46, pp. 145- 147 ,(2005) , 10.2320/MATERTRANS.46.145
Yoshihiro Terada, Yukako Mori, Tatsuo Sato, Role of Eutectic Intermetallic Phase on Creep Strength in a Die-Cast Mg-Al-Ca Alloy: Evaluation by Internal Stress Measurement Materials Transactions. ,vol. 48, pp. 97- 100 ,(2007) , 10.2320/MATERTRANS.48.97