Development of Heat Resistant Mg-Al-Ca Based Alloys for Casting and Semi-Solid Forming
2006; Scientific.net; Volume: 116-117; Linguagem: Inglês
10.4028/www.scientific.net/ssp.116-117.68
ISSN1662-9787
AutoresJeong‐Min Kim, Gun Ha Lee, Joong Hwan Jun, Ki‐Tae Kim, Woon Jae Jung,
Tópico(s)Hydrogen Storage and Materials
ResumoMg-8%Al-1%Ca was selected as a base alloy composition and small amounts of minor alloying elements, RE or Sr, were added. Microstructure of as-cast Mg-8%Al-1%Ca base alloys consists of dendritic primary Mg, Mg-Al-Ca and Mg17Al12 phases. Mg-Al-RE-(Ca) phase in the RE-added alloys and Mg-Al-Sr-(Ca) phase in the Sr-added alloys were additionally found. The creep resistance of Mg-8%Al based alloy was significantly improved by the minor alloying elements additions with 1%Ca. Comparatively globular primary phase could be obtained after just 30min. through an isothermal heating of as-cast Mg-Al-Ca alloys.
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