期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.03.092
关键词
Al: Electron microscopy; A2: Micromechanics; B: Aluminum alloys; C: Casting methods; D: Grains and interfaces
类别
资金
- Department of Science and Technology, Ministry of Science and Technology, Government of India [SR/S3/ME/0024/2007]
A16061 alloy matrix composites reinforced with 1, 2 and 3wt% nano-alumina particles are fabricated by ultrasound solidification technique. Application of high intensity ultrasonic vibrations to the melt resulted in uniform dispersion of alumina particles up to 2wt% additions of reinforcement. Tensile strength of the composites increased while the ductility is retained as compared to the base alloy. Addition of nano-particles above this threshold value of 2 wt% led to poor distribution and clusters of alumina particles, along with thermal stress induced micro-cracks. Theoretical calculations and TEM studies revealed that thermal mismatch between the matrix and reinforcement contributed dominantly to the yield strength up to 2wt% reinforcement additions, beyond which the thermal mismatch stresses led to formation of micro cracks. From among the various strengthening models, theoretical yield strength values calculated using the quadratic summation method showed good agreement with the experimental yield strength values for 1 and 2 wt% reinforced nano-composites.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据