The contribution is dedicated to surface integrity assessment of components from the point of view of residual stress profile after machining and finishing technologies. Residual stresses play the key role for dynamic life and service reliability of the part, especially rotating aircraft airfoils made of titanium and nickel base alloys. Except a brief summary of measurement methods practical experience with application of Beam deflection method combined with electrolytic etching is published. Specific measurement results for real aircraft Ti6Al4V airfoils and Ti6Al4V plates following its manufacturing technology are the subject of experimental part.

Precision machining of soft and hardened materials is a topic of high interest to substitute some traditional operations. This paper deals with some aspects of the precision machining of notches. All machining processes result in changes of surface layer properties. There are changes in residual stresses, in harness, changes in material structure etc. and also in surface accuracy and surface roughness. All these characteristics may affect fatigue cracks in machined parts.

A surface is a layer with its own structure and properties. Machined surfaces affect the functional properties of produced surfaces. These properties are affected by many factors, e.g., by cutting temperatures, friction, deformations in the primary deformation zone, the secondary deformation zone, and the surface layer of the transient (machined) surface, by cutting edge radius, cutting tool geometry, work hardening, residual stresses, cutting environment, etc.