Influence of Al-Si alloys microstructure on surface roughness after fine turning process

It has been proven that successful cutting of metal materials depends on th e morphology, and the size and distribution of intermetallic phases in the basic structure. An analysis of the structure of some aluminium alloys was carried out on an automated system for image acquisition and processing. Fo r the analysis, linear methods and area measurement methods were used. The present report describes the plastomechanical mechanism of surface generati on in machining various aluminium alloys with silicon and its influence on the workpiece surface. By joining the data on the mean arithmetic roughness and the corresponding intercept length of the solution crystals it is poss ible to get, with the aid of the linear discriminant function, the particul ar areas which define the closest of expected roughness with respect to the microstructural effects in the same fine-turning conditions.