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Development of a New Temperature Measurement System for the Observation of Adiabatic Shear Band
: Received: 22 May 2019 / Approved: 23 May 2019 / Online: 23 May 2019 (16:26:52 CEST)
A peer-reviewed article of this Preprint also exists.
Journal reference: Review of Scientific Instruments 2019, 90
This paper presents the development of a new system designed to measure the local temperature field in adiabatic shear band. Transient temperature field are simultaneously recorded by an array of 32 InSb infrared (IR) detectors and a streak camera working in visible-near infrared (VIS-NIR). Observations in IR offer a low temperature detection limit (350°C) but they are highly sensitive to uncertainty in the emissivity. Observations in VIS-NIR allow for measurement only at high temperatures (750°C) but they are less affected by uncertainty on emissivity and present a higher temperature sensitivity. By performing simultaneous measurements, it is possible to obtain data on a large temperature range with an improved accuracy at high temperature. The different sources of errors caused by uncertainty in the emissivity, spatial and temporal resolution of the detectors has been analyzed and an estimation of the total measurement uncertainty of the system is given.
shear band, pyrometry, punch test, streak camera
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