Abstract
In industrial applications, the shafting components with high stress are easily damaged due to cyclic loads if there is no surface treatment. With the use of ultrasonic cavitation peening, the residual compressive stress and the surface hardness of these components can be improved. While traditional longitudinal vibration transducers are used to treat cylindrical workpieces, the treated areas are limited, and the treatment period is relatively long. To solve these problems, we designed a novel configuration of the piezoelectric transducer as a type of the combination of rod and ring. During ultrasonic cavitation peening, we placed the cylindrical workpieces in the ring tool to improve the limitation. However, the treated surface properties were largely influenced by the input parameters (driving voltage and rod diameters). In this investigation, the cylindrical workpieces, which were covered with aluminum foils, were first treated by ultrasonic cavitation peening to detect the intensity and distribution of the cavitation bubbles on the treated surface. Then, the sonochemiluminescence method was utilized as an additional way to find the optimal operation parameters (190 V and 16 mm). Finally, the ultrasonic cavitation process was conducted with the optimal parameters. The treatment results showed that the surface hardness increased by about 36% without significant increase of the surface roughness.
Highlights
Received: 19 November 2020 Accepted: 21 December 2020 Published: 24 December 2020Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.In modern industrial applications, cylindrical components, such as shafts, bearings, and screws, are widely used in aerospace, ship, marine, and automotive industries [1,2]
The surface enhancement effects of ultrasonic cavitation peening on cylindrical workpieces were investigated utilizing a novel configuration of the piezoelectric transducer with a ring sonotrode
Since the working gap and the driving voltage play an important role in the properties of the cylindrical workpieces after ultrasonic cavitation peening, we carried out three different kinds of experiments in order to detect cavitation areas, cavitation intensity, and the properties of the peened surfaces
Summary
Received: 19 November 2020 Accepted: 21 December 2020 Published: 24 December 2020Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.In modern industrial applications, cylindrical components, such as shafts, bearings, and screws, are widely used in aerospace, ship, marine, and automotive industries [1,2]. Received: 19 November 2020 Accepted: 21 December 2020 Published: 24 December 2020. Sand pills and iron pills are typically used [4]. They are ejected with high speed and collide with the workpiece surfaces to improve the fatigue strength and change the surface properties of metal materials by generating surface compressive residual stresses. Sakamoto [5] found that the cylindrical workpieces of annealed medium carbon steel were peened with 140–2300% coverage by the traditional process and that the fatigue limits increased 14–25% compared to the non-peened workpieces. The traditional peening process tends to increase the surface roughness, causing a certain damage and limiting the improvement of surface properties
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
