QUANTITATIVE ANALYSIS OF GRAIN BOUNDARY PRECIPITATES IN 2024 ALUMINUM ALLOY BY USING 3D ELECTRON TOMOGRAPHY
Three-dimensional (3D) tomography of the precipitate in 2024 aluminum alloy was conducted by STEM-HAADF technique.It was found that there exist three kinds of phases distributed in the aluminum matrix: rod-like dispersoids (Al20Cu2Mn3),needle-like S phase (Al2CuMg) within grains and grain boundary precipitate (GBP,also S phase) showing both spherical and lenticular shape.The GBP particles distribute densely along grain boundary.The parameters describing the shape and the distribution of the GBP particles were calculated based on the 3D tomography.The results show that the 3D electron tomography is better to quantify the GBP.
aluminum grain boundary precipitate 3D tomography STEM-HAADF
Yanqing Yang Zongqiang Feng Maohua Li Yanxia Chen Bin Huang Xian Luo
School of Materials,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xian 710072,P.R.China
国际会议
北京
英文
276-279
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）