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- W276192290 abstract "Abstract Effect of CaO addition on age hardening response has been studied by using optical microscopy,scanning electron microscopy and differential thermal analysis in AZ91 and CaO-containing ECO-AZ91 alloys.After solution treatment, the β(Mg 17 Al 12 ) phase formed during solidification mostly disappeared in the microstruc-ture in the AZ91 alloy, whereas numerous β precipitates containing Ca were still observed in the ECO-AZ91 alloydue to its enhanced thermal stability. The ECO-AZ91 alloy showed the delayed peak aging time and higher peakhardness compared with those of the AZ91 alloy. The activation energies for β precipitation calculated by meansof Kissinger method increased from 71.4 to 85.6 kJ/mole by the addition of CaO, which implies that CaO plays arole in reducing β precipitation rate in the AZ91 alloy. (Received June 7, 2011; Revised June 20, 2011; Accepted June 24, 2011)Key words: ECO-AZ91 alloy, β phase, Age hardening, Precipitation 1. 서론 Mg 주조 중 지구 온난화에 큰 영향을 끼치는SF" @default.
- W276192290 created "2016-06-24" @default.
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- W276192290 date "2011-01-01" @default.
- W276192290 modified "2023-09-23" @default.
- W276192290 title "Effect of CaO Addition on Age Hardening Behavior of AZ91 Alloy" @default.
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- W276192290 doi "https://doi.org/10.12656/jksht.2011.24.4.193" @default.
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