scholarly journals Superficial Effects of Ball Burnishing on TRIP Steel AISI 301LN Sheets

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 82
Author(s):  
Ramón Jerez-Mesa ◽  
Gemma Fargas ◽  
Joan Josep Roa ◽  
Jordi Llumà ◽  
J. Antonio Travieso-Rodriguez
Keyword(s):  
Measurement Techniques ◽  
Strongly Correlated ◽  
Ball Burnishing ◽  
Transformation Induced Plasticity ◽  
Martensite Content ◽  
Burnishing Process ◽  
Steel Aisi ◽  
Vibration Assistance ◽  
Alternative Measurement ◽  
Subsurface Microstructure

This paper explores the consequences of applying an ultrasonic vibration-assisted ball burnishing process and its non-vibration assisted version on the topology and subsurface microstructure of a transformation-induced plasticity AISI 301LN alloy. More specifically, four different metallographic conditions provided as 1.5-mm thickness sheets and characterized by different starting martensite content (3, 10, 20 and 40 wt.%) are included in the study. Ball burnishing was performed along the lamination direction and perpendicular to it. Results show that the effect of ball burnishing is strongly correlated with the pre-existing microstructure. The steel containing the lowest quantity of initial martensite is the most affected by the process, achieving a higher residual hardening effect, similar to the untreated steel with an original martensitic content of around 40 wt.%. Moreover, the process succeeds in generating a 100-nm thick nanograin layer under the plate subsurface. Finally, no conspicuous effect of the application of vibration assistance was observed, which encourages the application of alternative measurement techniques in future works to define its effect on the properties after being ball burnished.

scholarly journals Combination of Acoustic Emission and Vibratory Measurements to Characterize an Ultrasonic Vibration Assisted Ball Burnishing Tool for a Lathe

2021 ◽  
Author(s):  
Ismael Fernández-Osete ◽  
Aida Estevez-Urra ◽  
Eric Velázquez-Corral ◽  
David Valentin ◽  
Jordi Llumà ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Ultrasonic Vibration ◽  
Numerical Control ◽  
Resonance Problem ◽  
Ultrasonic Frequency ◽  
Ball Burnishing ◽  
Burnishing Process ◽  
Vibration Assistance ◽  
Low Amplitude

In this paper, a resonant system that produces a movement of low amplitude and ultrasonic frequency is used to achieve the vibration assistance in a ball-burnishing process. A full vibration characterization of this process performed in a lathe was done. It is carried out by a new tool designed in the research group of the authors. Its purpose is to demonstrate that the machine and the tool do not have any resonance problem during the process and to prevent possible failures. The analysis of this dynamic behaviour permits to validate the suitability of the tool when it is anchored to a numerical control lathe. This is very important for its future industrial implementation. It is also intended to confirm that the system adequately transmits vibrations through the material. To do this, a methodology to validate the dynamic tool behaviour was developed. Several techniques that combine the usual and ultrasonic vibration ranges through static and dynamic measurements were merged: vibration and acoustic emission measurements. An operational deflection shape (ODS) exercise has been also performed. Results show the suitability of the tool used to transmit the assistance vibrations, and that no damage is produced in the material in any case.

scholarly journals Ultrasonic Vibration-Assisted Ball Burnishing Tool for a Lathe Characterized by Acoustic Emission and Vibratory Measurements

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5746
Author(s):  
Ismael Fernández-Osete ◽  
Aida Estevez-Urra ◽  
Eric Velázquez-Corral ◽  
David Valentin ◽  
Jordi Llumà ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Ultrasonic Vibration ◽  
Vibration Measurement ◽  
Ultrasonic Frequency ◽  
Emission Measurement ◽  
Ball Burnishing ◽  
Burnishing Process ◽  
Dynamic Techniques ◽  
Vibration Assistance ◽  
Low Amplitude

This paper focuses on a resonant system used to induce a low-amplitude movement and ultrasonic frequency to complement a ball burnishing process on a lathe. The system was characterized through the combination of different techniques. A full vibratory characterization of this process was undertaken with the purpose of demonstrating that the mechanical system—composed of the tool and the machine—does not present resonance phenomena during the execution of the operation that could lead to eventual failure. This dynamic analysis validates the adequateness of the tool when attached to an NC lathe, which is important to guarantee its future implementation in actual manufacturing contexts. A further aim was to confirm that the system succeeds in transmitting an oscillating signal throughout the material lattice. To this end, different static and dynamic techniques that measure different vibration ranges—including impact tests, acoustic emission measurement, and vibration measurement—were combined. An operational deflection shape model was also constructed. Results demonstrate that the only high frequency appearing in the process originated in the tool. The process was not affected by the presence of vibration assistance, nor by the burnishing preload or feed levels. Furthermore, the frequency of the assisting ultrasonic vibration was characterized and no signal due to possible damage in the material of the specimens was detected. These results demonstrate the suitability of the new tool in the vibration-assisted ball burnishing process.

scholarly journals Monitoring of Processing Conditions of an Ultrasonic Vibration-Assisted Ball-Burnishing Process

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2562 ◽  
Author(s):  
Aida Estevez-Urra ◽  
Jordi Llumà ◽  
Ramón Jerez-Mesa ◽  
Jose Antonio Travieso-Rodriguez
Keyword(s):  
Ultrasonic Vibration ◽  
Natural Frequencies ◽  
Milling Machine ◽  
Processing Conditions ◽  
Mechanical Assembly ◽  
Ball Burnishing ◽  
Beneficial Effects ◽  
Burnishing Process ◽  
Vibration Assistance ◽  
Vibratory Signals

Although numerous references present the beneficial effects on surface integrity of ultrasonic vibration-assisted ball burnishing (UVABB), nothing has been reported about the dynamic behavior of the UVABB tool, workpiece, and machine triad during the process. In this paper, a dynamic monitorization through a set of 5 accelerometers is tested to analyze the interactions between the tool–workpiece–machine mechanical assembly. A UVABB tool attached to a milling machine and equipped with a piezoelectric stack that is able to assist the process with a 40-kHz vibration is tested on a milled C45 steel surface. First, the natural frequencies of the mechanical system are obtained through hammer impact tests. Then, the vibratory signals transmitted during the execution of the process are monitored and compared to those: two feed velocities and two burnishing preloads, all with and without vibration-assistance. Results show that the proposed accelerometer set is valid to assess the behavior of a UVABB process. The system’s natural frequencies are not varied by vibration-assistance and are not excited when the piezoelectric is functioning. It is confirmed that UVABB is safe for the machine and the tool, and there is no unexpected excited frequencies due to the piezoelectric excitation.

scholarly journals Improving the Surface Finish of Concave and Convex Surfaces Using a Ball Burnishing Process

2011 ◽  
Vol 26 (12) ◽  
pp. 1494-1502 ◽  
Author(s):  
J. A. Travieso-Rodríguez ◽  
G. Dessein ◽  
H. A. González-Rojas
Keyword(s):  
Surface Finish ◽  
Ball Burnishing ◽  
Convex Surfaces ◽  
Burnishing Process

scholarly journals High-precision finishing hard steel surfaces using hydrostatic burnishing tool

2018 ◽  
Vol 249 ◽  
pp. 03002 ◽  
Author(s):  
S Swirad
Keyword(s):  
Ball Burnishing ◽  
Anisotropic Surface ◽  
Compressive Stresses ◽  
Finishing Process ◽  
Burnishing Process ◽  
Machine Parts ◽  
Steel Surfaces ◽  
Positive Effect ◽  
Precision Finishing ◽  
High Depth

The objective of this research aims to improve surface roughness of the hardened 145Cr6 (DIN) steel using the hydrostatic burnishing tool. The ball burnishing process with hydrostatic tools is very economical finishing process for various types of machine parts. This process reduces the height of surface unevenness, introduces compressive stresses at high depth (approx. 1 mm) and increase the hardness of the surface layer. The flat surface optimal ball burnishing parameters have been determined after conducting the Taguchi L9 matrix experiment. The input parameters are speed, burnishing force and burnishing width. It also showed a positive effect of hydrostatics burnishing on roughness and geometric structure of the surface. In most cases, the result is anisotropic surface, reduced roughness, reduced amplitude values of parameters such as: Sa, Sz.

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