TY - JOUR A1 - Tröber, Philipp A1 - Hackl, Alfred A1 - Leitner, Harald A1 - Welm, Markus A1 - Demmel, Peter A1 - Golle, Matthias A1 - Volk, Wolfram T1 - On the Sensitivity of a Tool–Workpiece Thermocouple to Chemical Composition and Microstructure JF - Steel research international N2 - Meeting the increasing demands on part quality and profitability of manufacturing processes despite difficult‐to‐machine materials is only possible with a deep understanding of the process. Herein, knowledge about the process temperature is of critical importance since it affects the material properties, such as hardness or forming behavior, as well as the chemical and physical interactions between the tool, workpiece, and lubricant. A proven thermoelectric method of temperature measurement in machining, forming, and blanking is a tool–workpiece thermocouple. Herein, instantaneous measurement of the temperature development is allowed in this setup during the manufacturing process in situ at the contact area of the tool and workpiece. The accuracy of this method is dependent on the calibration of the thermocouple, for which the Seebeck coefficients of the tool and workpiece material have to be determined. Usually, material samples from different batches are used for this purpose, although the resulting measurement errors due to slight changes in material properties are hardly known. The effects of small changes in the chemical composition and the transformation of the crystal lattice due to hardening on the Seebeck coefficient are investigated for the first time to allow precise quantification of the measurement error resulting from the calibration process. UR - https://doi.org/10.1002/srin.202200456 Y1 - 2023 UR - https://doi.org/10.1002/srin.202200456 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-53927 SN - 1869-344X SN - 1611-3683 VL - 94 IS - 4 PB - Wiley CY - Weinheim ER -