Improvements of machinability of aerospace-grade Inconel alloys with ultrasonically assisted hybrid machining

• DOI: 10.1007/s00170-018-3012-8
• Publication Date: 2018-11-14T04:34:35Z
• Authors: Wei Bai; Anuj Bisht; Anish Roy; Satyam Suwas; Ronglei Sun; Vadim V. Silbersc...
• Keywords: Machinability; Inconel

Aerospace-grade Ni-based alloys such as Inconel 718 and 625 are widely used in the airspace industry thanks to their excellent mechanical properties at high temperatures. However, these materials classified 'difficult-to-machine' because of shear strength, low thermal conductivity, tendency work-harden presence carbide particles microstructure, which lead rapid tool wear. Machining-induced residual stresses a machined part is an important parameter assessed since it can be evaluate overall structural resilience component its propensity fatigue failure in-service. Ultrasonically assisted turning (UAT) hybrid machining technique, tool-workpiece contact conditions altered by imposing ultrasonic vibration (typical frequency ~ 20 kHz) on tool's movement cutting process. Several studies demonstrated successfully resulting improvements forces surface topography. thorough study UAT-induced missing. In this study, experimental results presented for using both conventional (CT) UAT with different parameters investigate effect forces, roughness parts. The indicates that leads significant force reductions improved comparison CT speeds below critical level. workpiece show generates more compressive when compared those CT. Thus, demonstrates improvement machinability alloys.