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X-Ray Residual Stress Measurement of Ground Tungsten Carbides with Various Cobalt Contents

Published online by Cambridge University Press:  06 March 2019

Masaharu Miyano  and
Yukio Hirose
Masaharu Miyano
Affiliation:
R&D Planning Department, Riken Corporation, 14-1, Suehiro 4-chome, Kumagaya, Saitama 360 Japan
Yukio Hirose
Affiliation:
Department of Materials Science, Kanazawa University, Kakuma-machi, Kanazawa 920-11 Japan
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Abstract

The X-ray diffraction method was applied to the measurement of residual stresses on the ground or polished surfaces of WC-Co alloys with various Co contents. The X-ray diffractions of WC 211 by Cu K α radiation were used for the stress measurement. The residual stresses on the ground or polished surfaces were all compression. For the same Co content, the compressive value increased with increasing surface roughness. The maximum residua) stress, which was -2.13 GPa, was observed in WC-5.5wt%Co ground with a #140 diamond wheel.

The bending strengths of each alloys were obtained by three point bending tests. The bending strengths were influenced by grinding conditions and Co contents. The maximum value of 3.6 GPa was obtained in WC-16.0wt%Co ground with a #140 diamond wheel.

For the same Co addition, the bending strengths were closely related to the residual stresses, These relations were approximated by straight lines.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 39: Forty-Fourth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1995 , 1995 , pp. 311 - 318
Copyright
Copyright © International Centre for Diffraction Data 1995

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