文献类型：期刊文献

中文题名：AA6061半固态下非连续相的同步辐射研究

英文题名：Discontinuous Phase of Semi-solid AA6061 through Synchrotron Radiation Technology

作者：邬洁[1];姚乙[1];路贵民[1]

机构：[1]华东理工大学资源与环境工程学院

年份：2018

卷号：38

期号：11

起止页码：1208

中文期刊名：特种铸造及有色合金

外文期刊名：Special Casting & Nonferrous Alloys

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金资助项目(51374109)

语种：中文

中文关键词：半固态6061铝合金;二次加热;CT扫描;3D-XRD;三维组织重构

外文关键词：Semi-solid AA6061;Reheating;CT Scanning;3D-XRD;3D Microstructure Reconstruction

摘要：利用同步辐射X射线CT扫描技术对二次加热不同温度下AA6061试样组织进行扫描和三维重构,研究了二次加热过程中半固态初生α-Al相及其内部缺陷等非连续相的演变。结果表明,随着二次加热温度的升高,缩孔被液相补偿,缩孔出现几率下降,气孔出现几率上升,而内部缺陷整体有所减少,有利于半固态加工成形。富Fe相会阻碍液相对缩孔的补偿,不利于内部缺陷消除。
Synchrotron radiation X-ray computed tomography technology was adopted to reconstruct the three-dimensional microstructure of AA6601 billet with different reheating temperature.Three-dimensional internal defects were analyzed quantitatively to investigate influence of reheating temperature on internal defects evolution.The results reveal that with the increase of reheating temperature,the shrinkage cavity can be compensated by the liquid phase,leading to the decrease of shrinkage percentage and the rise of the gas pore as well as the decline of the internal defects ratio,which are beneficial for the semi-solid forming.However,the iron-rich phase can prevent liquid phase from compensating the shrinkage cavity,which is not conducive to eliminating the internal defects.