The objective of the research was to improve the wear resistance of titanium alloys by ball burnishing process. Burnishing process parameters such as burnishing speed, burnishing feed, burnishing force and number of pass were considered to minimize the specific wear rate and coefficient of friction. Taguchi optimization results revealed that burnishing force and number of pass were the significant parameters for minimizing the specific wear rate, whereas the burnishing feed and speed play important roles in minimizing the coefficient of friction. After burnishing surface microhardness increased from 340 to 405 Hv, surface roughness decreased from 0.45 to 0.12 μm and compressive residual stress were generated immediately below the burnished surface. The optimization results showed that specific wear rate decreased by 52%, whereas coefficient of friction was reduced by 64% as compared to the turned surface. The results confirm that, an improvement in the wear resistance of Ti–6Al–4V alloy has been achieved by the process of ball burnishing.

Wear resistance enhancement of titanium alloy (Ti–6Al–4V) by ball burnishing process

Influence of low-plasticity ball burnishing on the high-cycle fatigue strength of medium carbon AISI 1045 steel

Effects of pre-treatments on aging precipitates and corrosion resistance of a creep-aged Al–Zn–Mg–Cu alloy

In this article, the ball burnishing is applied on sculptured surfaces, aiming at enhance surface roughness. Different strategies are possible for burnishing, the continuous burnishing (CB) which uses a five-axis interpolation of the machine tool, and the patch burnishing (PB) using a more simple 3 + 2 axis interpolation. Using both techniques complex parts are burnished and a big improvement in surface roughness achieved, but some differences between both approaches appear. Two parts have been previously machined in a five-axis milling center and finished using the ball burnishing approaches. The first one is a steel AISI 1045 with a hemisphere shape, whose geometry is simple. The second one is a steel DIN 1.2379 part (64 HRC), with more complex features. Surface quality was evaluated for both burnishing approaches, obtaining significant improvements on surface roughness and hardness. The main general conclusion is that ball burnishing reduces roughness without penalizing the manufacturing time or surfac...

Five-Axis Machining and Burnishing of Complex Parts for the Improvement of Surface Roughness

Cold expansion technology of connection holes in aircraft structures: A review and prospect

A novel method and tool which enhance the fatigue life of structural components with fastener holes

Effect of slide burnishing basic parameters on fatigue performance of 2024‐Т3 high‐strength aluminium alloy

Modelling of residual stress relaxation around cold expanded holes in carbon steel

This paper presents a new method of mechanical surface treatment of external cylindrical surfaces and it is called “Spherical motion burnishing” (SMB). The axes of the workpiece and ring-shaped tool having toroidal acting surface intersect at angle θ =2°. The tool motion is superposition from a spherical motion and rectilinear translation with respect to the workpiece. The contact between the surface treated and its enveloped-tool acting surface is one of sliding friction in the presence of a lubricant. The method can be implemented on conventional machine tools, in particular on lathes by means of a relatively simple device and tool. To evaluate the manufacturing potentials of the SMB method a designed experiment has been carried out. The quality of the treated surfaces of workpieces made of low- and medium-carbon steel has been investigated experimentally. Mathematical models of the roughness and the residual axial normal stresses have been obtained on the basis of a planned experiment. The authenticity of the models has been proved on the basis of four extra tests. The method can be classified as mixed burnishing because it combines the advantages of hardening, dimensional burnishing and smoothing burnishing.

Spherical motion burnishing implemented on lathes

https://onlinelibrary.wiley.com/doi/pdf/10.1111/ffe.12915

G. V. Duncheva

Papers

A novel method and tool which enhance the fatigue life of structural components with fastener holes

Effect of slide burnishing basic parameters on fatigue performance of 2024‐Т3 high‐strength aluminium alloy

Modelling of residual stress relaxation around cold expanded holes in carbon steel

Spherical motion burnishing implemented on lathes

Impact of slide diamond burnishing additional parameters on fatigue behaviour of 2024‐T3 Al alloy