논문 해외 국제전문학술지(SCI급) MICROSTRUCTURE AND CASTABILITY OF MG-AL-LA ALLOYS FOR HIGH CONDUCTIVITY APPLICATIONS
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2015-09
- 저자명 김정민공동(제1),이승진
- 학술지명 INTERNATIONAL JOURNAL OF METALCASTING
- 발행처명 AMER FOUNDRY SOC INC
- 발행국가 해외
- 논문언어 외국어
홈페이지논문 초록 (Abstract)
Magnesium die-casting alloys based on the Mg-Al (magnesium-aluminum) system have been used increasingly in many industrial applications for the main purpose of weight savings. However, relatively low conductivity of conventional Mg-Al casting alloys such as AZ91 often limits the application areas and attempts to improve the conductivity without losing excellent casting capabilities and other properties of the Mg-Al based alloys that have been made recently. In this research, aluminum content was restricted to a comparatively low level for improving the conductivity and lanthanum (La) was added to compensate for reduced casting capabilities. As the La content was increased, the mold filling ability measured using a fluidity serpentine test mold was gradually increased, however the hot cracking susceptibility was observed to be initially increased and then decreased. The relationship between solidification characteristics and castabilities of Mg-3Al-xLa alloys was determined based on the thermal and cooling curve analysis results and microstructural characterization.