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Sensors 2017, 17(7), 1531; doi:10.3390/s17071531

Temperature Measurement and Numerical Prediction in Machining Inconel 718

Department of Aerospace Engineering, University Carlos III of Madrid, 28911 Leganés, Spain
Department of Electronics Technology, University Carlos III of Madrid, 28911 Leganés, Spain
Department of Mechanical Engineering, University Carlos III of Madrid, 28911 Leganés, Spain
Author to whom correspondence should be addressed.
Received: 22 May 2017 / Revised: 24 June 2017 / Accepted: 24 June 2017 / Published: 30 June 2017
(This article belongs to the Section Physical Sensors)
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Thermal issues are critical when machining Ni-based superalloy components designed for high temperature applications. The low thermal conductivity and extreme strain hardening of this family of materials results in elevated temperatures around the cutting area. This elevated temperature could lead to machining-induced damage such as phase changes and residual stresses, resulting in reduced service life of the component. Measurement of temperature during machining is crucial in order to control the cutting process, avoiding workpiece damage. On the other hand, the development of predictive tools based on numerical models helps in the definition of machining processes and the obtainment of difficult to measure parameters such as the penetration of the heated layer. However, the validation of numerical models strongly depends on the accurate measurement of physical parameters such as temperature, ensuring the calibration of the model. This paper focuses on the measurement and prediction of temperature during the machining of Ni-based superalloys. The temperature sensor was based on a fiber-optic two-color pyrometer developed for localized temperature measurements in turning of Inconel 718. The sensor is capable of measuring temperature in the range of 250 to 1200 °C. Temperature evolution is recorded in a lathe at different feed rates and cutting speeds. Measurements were used to calibrate a simplified numerical model for prediction of temperature fields during turning. View Full-Text
Keywords: temperature sensor; fiber-optic; pyrometer; Inconel 718; machining temperature sensor; fiber-optic; pyrometer; Inconel 718; machining

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Díaz-Álvarez, J.; Tapetado, A.; Vázquez, C.; Miguélez, H. Temperature Measurement and Numerical Prediction in Machining Inconel 718. Sensors 2017, 17, 1531.

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