View Full-text

pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (27권5호 198-202)

Effect of calcium addition on creep properties in Mg-Zn-Y alloys

Mg-Zn-Y 합금의 크리프 저항성에 미치는 칼슘의 영향

Yoon-Hee Lee, Hytm-Kyu Lim, Do-Hyung Kim, D0-Hyang Kim*

Center for Non-crystalline Materials, Yonsei University

Abstract

In the present study, the high temperature mechanical properties and creep resistance of Mg-Zn- Y-Ca alloys has been investigated. The Mg-4Zn-0.8Y alloy consists of -Mg matrix and icosahedral quasicrystalline phase. Calcium addition into Mg-4n-0.8Y based alloy results in the formation of and as the second solidification phases. Creep properties of the Mg-Zn-Y and Mg-Zn-Ca based alloys measured at applied stresses between 65 MPa and 85 MPa are significantly improved with adding calcium and yttrium, respectively. The improved creep resistance is due to the formation of thermally stable phase.

Keywords

Magnesium, Mg-Zn-Y, Interdendritic phase, Creep; n-value