논문 해외 국제전문학술지(SCI급) Microstructural evolution and mechanical properties of Mg–Cu–Zn ultrafine eutectic composites
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2009-09
- 저자명 Gi A. Song, Wonhee Lee, Nae S. Lee, Ki B. Kim, Jin M. Park, Do H. Kim, Do H. Kim, Jaeseoul Lee & Jun-Sik Park
- 학술지명 Journal of Materials Research
- 발행처명 SPRINGER LINK
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 9
홈페이지
논문 초록 (Abstract)
Novel ultrafine eutectic composites containing structural and spatial heterogeneities have been systematically developed in an Mg–Cu–Zn ternary system. Microstructural investigations of the ultrafine eutectic composites revealed that the bimodal eutectic structure consists of a mixture of cellular-type fine (α-Mg + MgZn2) and anomalous-type coarse (α-Mg + MgZn2 + MgCuZn) eutectic structures. An Mg72Cu5Zn23 alloy composed of the bimodal eutectic structure without micron-scale α-Mg dendrites presents a strong improvement of yield strength up to 455 MPa with a decent plastic strain of 5%. The rotation of the bimodal eutectic colony along the interfaces is considered to be an effective way to dissipate the stress localization thus enhancing the macroscopic plasticity.