Effect of Ultrasonic Vibration Tensile on the Mechanical Properties of High-Volume Fraction SiCp/Al Composite
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International Journal of Precision Engineering and Manufacturing https://doi.org/10.1007/s12541-020-00335-7
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Effect of Ultrasonic Vibration Tensile on the Mechanical Properties of High‑Volume Fraction SiCp/Al Composite Dao‑Hui Xiang1 · Zhi‑Meng Zhang1 · Bang‑Fu Wu1 · Hao‑Ren Feng1 · Zhan‑Li Shi1 · Bo Zhao1 Received: 1 October 2019 / Revised: 23 January 2020 / Accepted: 18 February 2020 © Korean Society for Precision Engineering 2020
Abstract Silicon carbide particle-reinforced aluminum matrix composite has been widely used in the military and aerospace industry due to its special performance; however, there remain many problems in processing. The present paper introduces an ultrasonic vibration tensile device with a view to investigating an ultrasonic vibration tensile specimen. The results show that there are three major stages in the change in stress of the material under ultrasonic vibration: the ultrasonic stress superposition effect, softening effect, and Hall–Petch strengthening effect, these three effects occupy different proportions in different tensile stages. In addition, increasing the frequency of ultrasonic vibration increased the degree of stress reduction. Increasing the ultrasonic vibration amplitude reduced the fracture strength of the material. Comparison of the fracture morphology shows that the conventional condition was mainly interfacial peeling of SiC particles, and cleavage of the fracture occurred under ultrasonic vibration conditions. Keywords Ultrasonic vibration tensile · SiCp/Al composite · Fracture strength · Magnitude of stress reduction
1 Introduction Metal matrix composites have generated considerable recent research interest [1–4]. SiCp/Al composite is a special material prepared using aluminum alloy as a metal matrix followed by the addition of a quantitative volume fraction or different size of silicon carbide particles as a reinforcement. SiCp/Al composite has been widely used in military, aerospace, transportation, and optical instruments due to its high specific strength and stiffness, as well as its wear resistance, * Dao‑Hui Xiang [email protected] Zhi‑Meng Zhang [email protected] Bang‑Fu Wu [email protected] Hao‑Ren Feng [email protected] Zhan‑Li Shi [email protected] Bo Zhao [email protected] 1
School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China
low thermal expansion coefficient, and other advantages [5–7]. However, high-volume fraction SiCp/Al composite is considered a difficult-to-machine material, owing to the presence of many hard and brittle SiC reinforcements. Therefore, ultrasonic vibration composite processing technology has attracted widespread attention. Wang et al. [8] through the geometrical analysis of the milling process, two-dimensional meso-scale finite element models composed of hard SiCp and soft aluminum matrix were established. The simulation result indicated that the rotation, pulling out, big cleavage, micro fracture, and cutting through of the SiC were the main defect formatio
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