A review on cutting tool technology in machining of Ni-based superalloys

Abstract

In this paper, a state-of-the-art review on cutting tool technology in machining of Ni-based superalloys is presented to better understand the current status and to identify future directions of research and development of cutting tool technologies. First, past review articles related to the machining of Ni-based superalloys are summarized. Then machinability of superalloys is introduced, together with the reported methods used in cutting tool design. The current researches on cutting tools in the machining of superalloys are presented in different categories in terms of tool materials, i.e., carbide, ceramics, and Polycrystalline cubic boron nitride (PCBN). Moreover, a set of research issues are identified and highlighted to improve the machining of superalloys. Finally, discussions on the future development are presented, in the areas of new materials/geometries, functional surfaces on the cutting tool, and data-driven comprehensive optimization.

An Evaluation on Machinability Characteristics of Titanium and Nickel Based Superalloys Used in Aerospace Industry

“…Here, as the nickel content, which is the main element of nickel-based superalloys, the cutting temperature rises and the notch wear increases as the hardness increases, as shown in Figure 6. The chemical structure of superalloys should be related to hardness while deciding machining conditions [41], [42]. The hardness of Ni and Ti alloys rises considerably with heat treatment, so they are also called age hardening.…”

“…Figure 6. Machinability of superalloys (Süperalaşımların işlenebilirliği) [42] Titanium alloys cover 30% of engine mass in the field of commercial and 40% in military [46]. The use of this material will increase with processing techniques that reduce faults that are harmful to the effective operation of the engine by early collapse of the relevant parts.…”

New developments in cooling techniques for machining superalloys

“…Zagadnienia te są przedmiotem zainteresowania światowej nauki i poświęcono im wiele świetnych przeglądów literatury, np. [1][2][3][4][5][6]. Tu zostaną omówione jedynie najnowsze osiągnięcia w technikach chłodzenia przy obróbce superstopów -z lat 2018-2020.…”

An Improvised Method of Machinability Evaluation with Predictive Temperature Model for Inconel 625: A Holistic Machinist’s Perspective

“…Y i =1*a 0 + x i a 1 + u i a 2 + w i a 3 +e i (2) where 1 is the error, a 0 is the constant for temperature; , , represent speed, feed, depth of cut, and a1, a2, and a3 are the coefficients for speed, feed, and depth of cut, respectively. Further, Eq.…”

“…The parameter is based on the ease with which material can be machined with an acceptable surface finish [1]. Machinability can be estimated in terms of characteristics like tool wear, chip formation, and surface finish [2] (see Figure 1). Nickel alloys are known for hard-to-machine materials, have tremendous applications in the areas of aerospace, marine, and biomedical parts because of their favourable properties such as corrosion resistance, good strength, along with superior thermal fatigue.…”