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RESEARCH PAPERS

Direct Measurement of Temperature in High Speed Torsion Tests

[+] Author and Article Information
R. L. Woodward, B. J. Baxter, S. D. Pattie, J. A. Coleman

Australian Department of Defence, Materials Research Laboratories, Ascot Vale 3032, Victoria, Australia

J. Eng. Mater. Technol 109(2), 140-145 (Apr 01, 1987) (6 pages) doi:10.1115/1.3225953 History: Received July 01, 1986; Online September 15, 2009

Abstract

A method of directly measuring the temperature rise during high speed torsion tests is described. The test sample is formed by welding two materials of similar mechanical properties but different thermoelectric characteristics and ensuring, by reducing the section, that the gauge length includes the thermocouple junction. A number of tests were conducted using the nickel base thermocouple alloys Nicrosil and Nisil (I.S.A. Type N). The temperature rise observed during uniform deformation agrees with that expected from simple thermomechanical calculations. Void growth and coalescence lead to a strain concentration and ductile fracture which is accompanied by a more significant temperature rise.

Copyright © 1987 by ASME
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