Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5456786 | Materials Science and Engineering: A | 2017 | 22 Pages |
Abstract
The ultrasonic vibration treatment is successfully applied to improve the particles distribution of in-situ 2.5Â vol% TiB2 particles reinforced Al-4.5Cu alloy matrix composites fabricated by salt-metal reaction process. Large particles aggregates are eliminated by effects of the cavitation and the acoustic streaming of ultrasonic vibration for 30Â s. All the particles aggregates are eliminated and the particles are uniformly distributed in the melt after treated by ultrasonic vibration for 120Â s. TiB2 particles are identified by X-ray diffraction and transmission electron microscope analysis. Some TiB2 particles are dispersively distributed in the matrix after solidification. The composite treated by ultrasonic vibration for 120Â s has the optimal improvements of yield strength and ultimate tensile strength, which increased by are 84% and 39% respectively. The strengthening mechanisms are discussed, the improved particles distribution brings enhancements on Orowan strengthening, Thermal expansion mismatch strengthening, grain refinement, etc., which are responsible for the improvements of mechanical properties.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Qi Gao, Shusen Wu, Shulin Lü, Xinchen Xiong, Rui Du, Ping An,