Real structure of milled inconel 738LC turbine blades

0439829 - ÚFP 2015 RIV CH eng C - Conference Paper (international conference)
Pala, Z. - Kolařík, K. - Beránek, L. - Čapek, J. - Kyncl, J. - Mušálek, Radek - Ganev, N.
Real structure of milled inconel 738LC turbine blades.
Advanced Materials Research. Vol. 996. Zürich: Trans Tech Publications, 2014 - (François, M.; Montay, G.; Panicaud, B.; Retraint, D.; Rouhaud, E.), s. 646-651. 996. ISSN 1662-8985.
[European Conference on Residual Stresses, ECRS 2014/9./. Troyes (FR), 07.07.2014-10.07.2014]
Institutional support: RVO:61389021
Keywords : Milling * Nickel super-alloys * Turbine blades
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
http://www.scientific.net/AMR.996.646

Machining of nickel super-alloys is difficult since mechanical hardening and, consequently, extreme tool wear occur. In the case of turbine blades, castings can no longer meet stringent requirements for precision; hence, they are being ground or milled in order to comply with the demanded dimensions. In this contribution, castings made of Inconel 738LC were machined by four axis milling. The resulting surface of gas turbine blades are characterized by several surface integrity parameters with respect to the structural inhomogeneities caused by mutual effect of plastic deformations and thermal fields during the cutting process. Moreover, the impact of effective contact area of the cutter was considered as well. It will be shown that ideal machining parameters viewed from the standpoint of surface roughness and economy of the whole machining process can lead to appreciable tensile normal stresses.
Permanent Link: http://hdl.handle.net/11104/0243009