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Running-in process is an important stage of whole wear process. The irrelevance of surface roughness before and after running-in puzzled the running-in research. However, this conclusion was based on surface roughness derived from the 2D surface profile which does not contain 3D information, and was therefore not complete. In this paper, running-in experiments were conducted to investigate the issue. The results showed that there is no equilibrium surface topography similar with equilibrium roughness at the end of running-in process.

The main purpose of this paper is to analyze the influence of cutting regime parameters in case of dry turning of an aluminum alloy. For turning process of the aluminum alloy was used Sandvik insert DCGX 11 T3 08 Al H10. The influence of the main cutting parameters on the surface quality was analyzed using a statistical method (ANOVA) used to test differences between two or more means. Based on a mathematical model can be calculated the surface roughness taking into account the cutting speed, the feed rate and the depth of cutting.

Abrasive Water Jet is an innovative process which proves to be a good solution for cutting, drilling, polishing and milling, for various materials. Abrasive Water Jet milling has some advantages, compared with classical technologies, such as: high flexibility and machining versatility, no thermal distortion. In this paper the authors proposed a few strategies for water jet milling manufacturing. Using the correct processing strategies and proper process parameters, water jet milling is a good solution to manufacture plan surfaces, profiles and slots.