Journal
WEAR
Volume 268, Issue 11-12, Pages 1237-1242Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2010.01.019
Keywords
Temperature measurement; Visible pyrometry; Flash temperatures; High speed friction; Dry friction
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An experimental method is presented in this paper to measure flash temperatures of sliding surfaces. High sliding velocities are reached by using a ballistic set-up 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 degrees C around an area less than 100 urn in diameter. (C) 2010 Elsevier B.V. All rights reserved.
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