Elevated temperature compressive deformation behavior of 2024Al matrix composite reinforced by sub-micro Al2O3 particles
(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
Abstract: The compressive behavior of sub-micro Al2O 3P （40%, volume fraction）/2024Al composite was investigated within the temperature range from 270℃ to 620℃ under various strain rates from 0.00042s-1 to 0.14s-1. Results show that the critical compression reduction of the composite presents a saddle law under the combined influence of temperature and strain rate. That means the composites exhibit better deformation ability at higher temperature with higher strain rate （445℃, 0.14s-1） or at lower temperature with lower strain rate （320℃, 0.0042s-1）.
Key words: composite； Al2O3 particle； compressive deformation； critical compression reduction； saddle law； deformation mechanism