Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 3 No. 3 September 1993|
（1.General Research Institute For Non-ferrous Metals; Beijing 100088; China
2.Harbin Institute of Technology; Harbin 150006; China）
Abstract:The process of aging precipitation in SiCp/6061 and Al2O3/6061 composites were investigated. Hardness testing, differential scanning calorimetry(DSC) and transmission electron microscopy were employed. Results showed that the precipitation phase form directly along dislocation lines in the composites because the particles produce high densities of dislocations which makes vacancy densities in the composites decrease, and the main precipitation phase at peak hardness was β′ phase.
Key words: particle composite aging precipitation phase