李廷举

个人信息Personal Information

教授

博士生导师

硕士生导师

任职 : 辽宁省高校重点实验室主任

性别:男

毕业院校:日本国名古屋大学

学位:博士

所在单位:材料科学与工程学院

学科:材料加工工程

联系方式:0411-84708940

电子邮箱:tjuli@dlut.edu.cn

扫描关注

论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

Microstructure analysis of rheoformed AZ91 alloy produced by rotating magnetic fields

点击次数:

论文类型:期刊论文

发表时间:2008-08-11

发表刊物:JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物:SCIE、EI、Scopus

卷号:461

期号:1-2

页面范围:106-112

ISSN号:0925-8388

关键字:AZ91 magnesium alloy; rotating magnetic fields; thixotropic structure; solid fraction

摘要:AZ91 magnesium alloy was rheoformed using rotating magnetic fields (RMFs) after isothermal near-liquidus treatment. Thixotropic microstructures obtained at different temperatures were characterized in detail and linked to the corresponding volume solid fraction, and serial sectioning experiments were performed to construct three-dimensional morphologies of clusters consisting of conglutinated primary grains. The experimental results indicated that incompact structure agglomerating a few primary solid particles was observed within structures of low solid fraction, while a reduction in the castings' forming temperature and so increasing the fraction of primary solid phase brought out interaction among the primary particles within vigorously stirring melt, and thus caused slide and plastic deformation between or among the neighboring solid particles. In contrast with structure with low solid fraction, this slide and plastic deformation resulted in differently morphological 3D structures welded together with much more solid particles. Moreover, the increase in solid fraction mainly lied on the formation of new particles. (c) 2007 Elsevier B. V. All rights reserved.