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Sonication during solidification and mechanical properties of the aluminum alloy

Author: ZhangPing
Tutor: HuShiCheng
School: Central South University
Course: Mechanical Design and Theory
Keywords: Sonication Aluminum alloy Solidification Mechanical Properties Fine-grained mechanism
CLC: TG292
Type: Master's thesis
Year: 2010
Downloads: 132
Quote: 1
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Abstract


Papers ultrasound outfield on aluminum alloy solidification process and organizational performance by test and analysis for the study of the target , the ultrasonic treatment of aluminum alloy during solidification temperature changes and solidification microstructure and mechanical properties were studied , combined with a theoretical analysis of ultrasound refine aluminum solidification mechanism of the organization were discussed. The research work mainly includes the following sections: 1 . Ultrasound casting the experimental system were tested commercially pure aluminum and 7050 aluminum alloy solidification process temperature changes , and comparative analysis of the ultrasonic power of industrial aluminum and 7050 initial solidification temperature and the coagulation time of impact . The experimental results show that : With the increase in the ultrasonic power , solidification of the initial temperature drop , the solidification time is shortened . The experimental study of ultrasonic power of pure aluminum and 7050 aluminum alloy grain size , tensile strength and hardness of ultrasonic power on the trend of the tensile strength and hardness . The experimental results show that the ultrasonic treatment to refine the solidification structure of pure aluminum and 7050 aluminum alloy to improve the tensile strength and hardness , and ultrasonic treatment of 7050 aluminum alloy grain refining effect is more pronounced . The theoretical analysis of the theory of ultrasonic aluminum alloy melt during solidification crystallization temperature , the nucleation rate of nuclei growth rate and undercooling , and establish a corresponding mathematical model , from the point of view of the solidification of thermodynamics qualitative analysis of ultrasonic refined the solidification structure mechanism, combined with the analysis of experimental test results of ultrasonic refinement mechanism . Solidification structure refinement in the work of this thesis can be applied for ultrasonic aluminum alloy continuous casting and rolling and aerospace aluminum alloy ingot with a high-performance large-sized semi-continuous casting process , improve the mechanical properties provide a theoretical reference , expectations of the aluminum alloy somewhat barnyard development of ultrasound casting technology benefits .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Casting > Non-ferrous metal casting > Light metal casting
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