Title: Influence of cutting tool geometry, feed rate and cutting fluid on the machinability of Inconel 751

Authors: Anderson Clayton Alves de Melo, Julio Cesar Giubilei Milan

Addresses: Departamento de Engenharia Mecanica, Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Campus Universitario, S/N, Lagoa Nova, Natal/RN, CEP. 59.072-970, Brazil. ' Departamento de Engenharia Mecanica, Centro de Ciencias Tecnologicas, Universidade do Estado de Santa Catarina, Campus Universitario Prof. Avelino Marcante, S/N, Bom Retiro, Joinville/SC, CEP. 89.223-100, Brazil

Abstract: Inconel represents a family of nickel-based super alloys with a wide range of application including components that work at high temperatures. Despite of this, nickel-based super alloys are generally known to be one of the most difficult materials to machine. In this paper, attention is focused on the machinability of Inconel 751 which is a nickel-based super alloy normally used to manufacture exhaust valves of internal-combustion engines. In this case, an experimental investigation where a series of dry and wet rapid facing trials (turning) using coated carbide tools were performed. Metal removing process was carried out for two different feed rates and two different tool geometries. For indirectly quantifying the tool wear, the machined surface profile has been measured using a centesimal dial gauge. Moreover, cutting tools have been analysed with a scanning electronic microscope. The results provide important practical information about the machinability of Inconel 751.

Keywords: machinability; Inconel 751; tool wear; cutting condition; tool geometry; feed rate; cutting fluids; nickel; superalloys; coated carbide tools; turning.

DOI: 10.1504/IJMMM.2011.038158

International Journal of Machining and Machinability of Materials, 2011 Vol.9 No.1/2, pp.16 - 34

Published online: 19 Jan 2011 *

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