Faculty Advisor

Brown, Christopher A.


The objective of this Major Qualifying Project is to study surfaces produced by mass finishing. To better understand the basic mechanisms we have determined the normal forces between a surface and a sample mass finishing media by measuring scratch depths from brief mass finishing times on polished surfaces, testing the micro-hardness of the surface, and measuring the shape of the abrasive particles in the media. We also studied how the surface produced by mass finishing effects the shininess of the surface. In particular scale-sensitive fractal analysis allowed us to identify the scales at which the surface roughness and surface reflectivity correlate the best. The results of this work should support product and process design for mass finishing.


Worcester Polytechnic Institute

Date Accepted

April 2012


Mechanical Engineering

Project Type

Major Qualifying Project



Advisor Department

Mechanical Engineering