Investigation on recovery and recrystallization of Al-Si-Al2O3 composites
Al-Si-Al2O3 composites were prepared by powder metallurgy with in-situ synthesis technology.The recovery and recrystallization behavior of Al-Si-Al2O3 composites which underwent compression and then heat-treatment under different temperature were studied using micro-hardness tester, optical microscope (OM) and scanning electron microscopy (SEM).The results showed that the hardness of composites increased dramatically after compression, and the sample containing 5wt% Si was increasing more evidently than the sample including 10wt%Si.Heat treatment gradually eliminated work hardening; meanwhile the fact that the hardness of composites trended to decline greatly when subjected to annealing suggested occurrence of recovery and recrystallization inside the composites.Recrystallization nucleation preferentially took place in the region near the particle, while the growth of recrystallized grains can also be hindered owning to the pining effect of particles.Depending on the analysis of microstructure and microhardness, it can be concluded that the recrystallization temperature of Al-wt.5%Si-Al2O3 composites was 500℃ and the Al-wt.10%Si-Al2O3 composites was 525℃.
Al-Si-Al2O3 composites Plastic deformation Recovery and recrystallization
Wang Xiongwei Jiang Xiaosong Zhu Degui Zhang Luo
School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,P.R.China
国际会议
香港
英文
345-350
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）