南京航空航天大学学报（英文版）2007，Vol.24Issue(3)：265-269,5.
7055铝合金单级时效微观结构演变的透射电镜研究
TEM STUDY ON MICROSTRUCTURAL DEVELOPMENT OF SINGLE-AGEING 7055 ALUMINUM ALLOYS
摘要
Abstract
Microstructural development of a commercial 7055 (Al-Zn-Mg-Cu)alloy is studied by transmission electron microscope(TEM) during the process of single-ageing for up to 48 h. It is observed that Guinier-Preston (GP) zones are formed on [111] planes when the sample is aged for a short time and grows up gradually with increase of ageing time. Η＇ phase is formsed after ageing for 4 h at 120℃, having the orientation relationship with the matrix as[0 0 0 1]η＇//[1 (1) 1]Al and (1 0 (1) 1)η＇//(1 1 0)Al.η phase starts to occur after 24 h ageing and has an orientation relationship with matrix as [(1) 1 0 0]η//[1 1 0]Al and (0 0 0 1)η//(1 1 1)Al. Since the density of both η' phase and η phase particles is much lower than that of GP zone on aged alloy, GP zones are important to control the properties of the alloy.关键词
7055铝合金/时效/透射电子显微镜Key words
7055 aluminum alloys/ ageing/ TEM分类
矿业与冶金引用本文复制引用
沈凯,尹志民,王涛..7055铝合金单级时效微观结构演变的透射电镜研究[J].南京航空航天大学学报（英文版）,2007,24(3):265-269,5.基金项目
中南大学博士后基金资助项目.Supported by the Postdoctorial Foundation of Central South University. （）
