刘希琴

Associate Professor  

Education Level:上海医科大学

Degree:Master's Degree in Medicine

School/Department:College of Material Science and Technology

Discipline:Nuclear Technology and Applications. Material Science

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Paper Publications

The microstructure and mechanical properties of as-cast Mg-4Y/Nd-2Zn alloys

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Affiliation of Author(s):材料科学与技术学院

Journal:MATERIALS SCIENCE AND TECHNOLOGY

Key Words:Mg-4Y/Nd-2Zn alloys Xphase W phase microstructure mechanical properties

Abstract:Optical microscopy, scanning electron microscopy, X-ray diffraction and tensile testing were performed to investigate the microstructure and mechanical properties of as-cast Mg-4Y/Nd-2Zn alloys. The results show that the secondary dendritic arm spacing for the Mg-4Y-2Zn alloy is smaller than that for the Mg-4Nd-2Zn alloy, and that X-Mg12YZn or W-Mg3Zn3Nd2 form in Mg-4Y/Nd-2Zn alloys. The lamellar X phase distributes at the grain boundary, pointing into the grains, whereas the rod-like W phase preferentially segregates at the triangle junction of the grain boundary. The greater grain boundary strengthening effect and the smaller fragmentation effect of the brittle eutectic phases leads to the as-cast Mg-4Y-2Zn alloy having better comprehensive mechanical properties. The fracture mechanism for as-cast Mg-4Y/Nd-2Zn alloys is quasi-cleavage fracture.

ISSN No.:0267-0836

Translation or Not:no

Date of Publication:2018-01-01

Co-author:刘洋,Liu Zili,刘国栋,范汝友,尹涵,李健

Correspondence Author:lxq

Pre One:Thermal and electrical conductivity of as-cast Mg-4Y-xZn alloys

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