Effect of technological heredity on the fatigue strength in the manufacture of gas turbine engine blades

Abstract

Abstract. In the study, the task of researching of the finishing-strengthening machining stage of gas turbine engine compressor blades manufactured of titanium and nickel-chromium alloys in order to extend their service life was solved. The application of electrochemical pulse machining as a technological heredity barrier was substantiated since this method allows a considerable decrease of the residual stress and surface layer work hardening. To ensure the extended service life of blades, the conditions for the subsequent finishing-strengthening machining were identified.

Technological Heredity of the Turning Process

“…Such a phenomenon is referred to as technological heredity. For the first time, the concept of technological heredity in the context of machining appeared in Russia in the 1980s [17,18]. The analysis of technological heredity allows to determine the stage of the technological process of the product at which a given error occurs and the way it is formed during the whole production process.…”