HRTEM Observation of the Age Hardening Precipitates in Mg-Gd-Sc Alloys, with Different Gd Concentrations

Takafumi Fujii; Kenji Matsuda; Tokimasa Kawabata; Susumu Ikeno

doi:10.4028/www.scientific.net/AMR.409.335

Paper Titles

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Strengthening by Addition of Refractory Elements to Ni₃(Si,Ti) Intermetallic Alloys
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Ductilization of a Ni₃(Si,Ti) Intermetallic Alloy by Addition of Interstitial Type Elements
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Discontinuous and Continuous Precipitation during Aging in Mg-Al System Alloys
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HRTEM Observation of the Age Hardening Precipitates in Mg-Gd-Sc Alloys, with Different Gd Concentrations
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Microstructure Observation of AM60 Magnesium Alloy Solidified by Rapidly Quench
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The Development of Novel Textures in Rare Earth Element Containing Magnesium Alloys
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HRTEM Observation of Early Stage of Precipitation in Mg-Gd-Y Alloys
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Effect of Zn Content on Aging Behavior of Binary Mg-Zn Alloys
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HRTEM Observation of the Age Hardening Precipitates in Mg-Gd-Sc Alloys, with Different Gd Concentrations

Abstract:

High resolution transmission electron microscope (HRTEM) observations were performed to investigate the age hardening precipitates in Mg-Gd-Sc alloys. The maximum hardness of these alloys increased with Gd content. The precipitates with the features of β” phase and β’ phase in Mg-Gd alloy were observed in Mg-15Gd-6.4Sc and Mg-10Gd-6.4Sc alloys. Maximum hardness and number density of precipitate in Mg-15Gd-6.4Sc alloy were higher than that in Mg-10Gd-6.4Sc alloy, and the finer precipitates with higher number of density were contributed to the maximum hardness in Mg-Gd-Sc alloys.