Role of jet radius and jet location in cryogenic machining of Inconel 718: a finite element method based approach
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ORIGINAL PAPER
Role of jet radius and jet location in cryogenic machining of Inconel 718: a finite element method based approach Ibrahim Nouzil1 · Salman Pervaiz1
· Sathish Kannan2
Received: 10 December 2019 / Accepted: 28 August 2020 © Springer-Verlag France SAS, part of Springer Nature 2020
Abstract Cryogenic cooling is attributed as a green option to counter the high temperatures developed in machining process. The parameters specific to the cryogenic cooling such as jet radius and jet location have controlling influence on the machining performance. Inconel 718 is one of the most prominent aeronautic alloys, mainly used in the aerospace industry due to its high strength and ability to retain properties at very high temperatures. Inconel 718 is a hard to cut material due its low thermal conductivity and work hardening behavior. The present study that investigates the impact of cryogenic cooling using liquid nitrogen coolant on orthogonal turning of Inconel 718 for different values of jet radius, jet location and cutting speeds. The study incorporated a finite element model to simulate the different machining test conditions. The virtual assessment of cryogenic cutting process is beneficial for the decision making that how these parameters can contribute towards final decision making. The dissipation of heat at cutting edge and presence of jet of cryogenic coolant was simulated and analyzed for different jet radii, jet locations and cutting speeds. The study detected shear angle and evaluated chip compression ratio to understand the plastic deformation and related effects. The study revealed that cutting temperature decreased with increasing flow of LN2 at the cutting edge while the cutting force increased with high flow of coolant. Keywords Cryogenic · Machining · Liquid nitrogen · Inconel 718 · Jet radius
1 Introduction 1.1 Cryogenic machining background Development in materials can play an integral role toward the progress of any technology. Nowadays it would be appropriate to say that materials drive Industries. Similarly, in the aerospace sector, new discoveries and inventions in the modern engineering materials and composites are driving the industry [1]. Inconel 718 is a nickel-based alloy, and mainly used in the aeronautic applications. Properties such as high corrosion resistance and lightweight make it suitable for aerospace applications [2]. At the same time Inconel 718 is among the difficult-to-cut materials due to its work hardening
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Salman Pervaiz [email protected]
1
Department of Mechanical and Industrial Engineering, Rochester Institute of Technology Dubai, 341055, Dubai, United Arab Emirates
2
Department of Mechanical Engineering, American University of Sharjah, 26666, Sharjah, United Arab Emirates
behavior, low thermal conductivity, high chemical reactivity and high hot hardness. These inherent properties also increase the cost and energy consumption during machining phase as well. Further, due to the negative impacts associated with the machining process there is an urgency to impleme
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