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Aging Behaviors of Mg-5Sn-xCa Alloys During Aging Heat Treatments  

Park, Joon-Sik (Division of Advanced Materials Engineering, Hanbat National University)
Kim, Jeong-Min (Division of Advanced Materials Engineering, Hanbat National University)
Kim, Ha-Young (Division of Advanced Materials Engineering, Hanbat National University)
Choi, Yang-Jin (Division of Advanced Materials Engineering, Hanbat National University)
Lee, Jae-Seol (Materials & Parts team, Korea Institute of Industrial Technology)
Son, Hyun-Taek (Materials & Parts team, Korea Institute of Industrial Technology)
Publication Information
Journal of Korea Foundry Society / v.28, no.5, 2008 , pp. 221-225 More about this Journal
Abstract
The structural and hardness variations of Mg-5Sn-(1,2,3) Ca (wt%) alloys have been investigated during various aging heat treatments followed by solution heat treatment at $500^{\circ}C$ for 24 hrs. Maximum hardness of Hv61 has been obtained for Mg-5Sn-3Ca alloys, when the aging treatment was performed at $200^{\circ}C$ for 24 hrs. The microstructures were critically changed when the content of Ca was more than 1wt%, since CaMgSn and $Mg_{2}Ca$ phases were mainly precipitated during aging treatments. The hardness variations with structural evolutions are discussed with respect to the aging temperatures and times.
Keywords
Magnesium alloys; Aging treatment; Precipitates;
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