中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 No. 6 December 2003 |
used in precipitation in AlZnMgCuLi alloy
LIU Pei-ying(劉培英)1， CHEN Chang-qi(陳昌麒)1, ZHONG Hao(鐘 皓)2, HONG Xin-guo(洪新國)
（1. School of Materials Science and Engineering,
Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Beijing Synchrotron Radiation Facility Division,Institute of High Energy Physics,
Chinese Academy of Sciences, Beijing 100039, China）
Abstract:Small angle X-ray scattering has been used to study the variation of microstructure parameters in an Al-Zn-Mg-Cu-Li alloy aged at various temperatures for various durations. Coarsening of precipitates was studied by analyzing the curve of kinetics strength vs the cube of radius. The results show that the coarsening of precipitates conforms to LSW principle. In addition, the characteristic of s3J(s) vs s curves was analyzed. The results show that the curves for samples aged at 160℃ for various durations(24, 48 and 96h) have negative deviation, which maybe results in the formation of certain new precipitate. In the other aging treatment states, the curves conform to Porod principle which means there is sharp boundary between the precipitates and matrix.
Key words: Al-Zn-Mg-Cu-Li alloys; precipitate; microstructure parameters; aging; small angle X-ray scattering
