Flash temperature measurement during dry friction process at high sliding speed

Abstract

An experimental method is presented in this paper to measure flash temperatures of sliding surfaces. High sliding velocities are reached by using a ballistic setup equipped with a high speed camera. The temperature field on the friction surface was recorded during the process. Tests were conducted under dry sliding conditions by using an identical material for the rubbing bodies, which are of middle hard steel (C22). Experiments showed that the temperature distribution generated by frictional heating is made up of small hot spots that correspond to the friction of asperities located on the sliding surface during very short time. Deduced from observations, maximum local surface temperatures can exceed about 1100 • C around an area less than 100 m in diameter.

Preparation and Dynamometer Tests of 3D Needle‐Punched C/C‐SiC Composites for High‐Speed and Heavy‐Duty Brake Systems

“…22 The isother- mal oxidation curves of 3D needle-punched C/C-SiC composites with Si-Mo coating in air at 1000°C are shown in Fig. 5.…”

Raman characterization of Ti–6Al–4V oxides and thermal history after kinetic friction

“…This device has already established the presence of localized flash temperatures higher than 800 C for steel on steel friction, due to interactions between the two sample asperities. [7] The goal of Raman spectroscopy is then to confirm and characterize more precisely the distribution of those areas as well as validate the reached temperature values thanks to a postmortem observation.…”

“…Consequently, the opportunity to rebuild the temperature field on the outermost surface is a key factor for determining the friction factor value. A recent experimental study of Sutter and Ranc [7] showed that friction between two samples of medium-low carbon steel at 34 m/s can induce flash temperatures over 1100 C. Bogdanovich and Tkachouk [8] showed that temperature reached between two asperities can attain the melting point of the softer material. They were pioneered by Block [9] who has first highlighted the flash temperature concept.…”

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