抄録
Burnishing is a process of finishing a metal by compressing its surface layer by the application of a highly polished and hardened ball or roller. Burnishing being an application of the cold working process produces significant improvements in the functional properties of the burnished surface. This paper presents an experimental investigation concerning the effect of some burnishing parameters, namely speed, feed, applied force, and number of passes on surface finish, and micro-hardness of the surface layer for 70-30 cu-zn alloy during an external ball burnishing process. The analysis of the experimental data has been carried out using a response surface methodology. Two mathematical models correlating the process parameters and their interactions with some of the response parameters have been derived and discussed. The residual stress distribution, the maximum residual stress, and depth of the stressed region of solution treated and aged 7075 aluminium alloy workpieces that are orthogonally burnished are determined using a deflection etching technique.
