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Affiliation of Author(s):材料科学与技术学院

Journal:MATERIALS SCIENCE AND TECHNOLOGY

Key Words:Magnesium alloys Mg-4Y Al2Y microstructure mechanical properties

Abstract:The effects of Al additions (<= 4 wt-%) on the microstructure and mechanical properties of Mg-4Y alloys were investigated. The microstructure of the as-cast Mg-4Y-1Al alloy consisted of an alpha-Mg matrix, together with Mg24Y5 and Al2Y phases. Al2Y formed preferentially when Al was added, replacing the Mg24Y5 phase by consuming Y solute. The eutectic reaction occurred, forming a-Mg and Mg24Y5 phases for Al contents below 2 wt-%; however, the pseudo-binary eutectic reaction occurred, forming alpha-Mg and Al2Y phases, for Al contents higher than 2 wt-%. The addition of Al improved mechanical properties. The Mg-4Y-4Al alloy exhibited the optimal ultimate tensile strength and yield strength, with values of 208 and 81 MPa, respectively.

ISSN No.:0267-0836

Translation or Not:no

Date of Publication:2017-01-01

Co-author:尹涵,lxq,范汝友,刘洋,李健

Correspondence Author:Liu Zili