Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1604378 | International Journal of Refractory Metals and Hard Materials | 2009 | 6 Pages |
Abstract
The temperature dependence of residual stresses in a WC–17.8vol.%Co cemented carbide was measured by neutron diffraction. The comparison of the WC lattice parameter within the WC–Co and within stress-free WC reference provides a measurement of lattice elastic strains and, using Hooke’s law, stresses. WC is found to be under hydrostatic compressive stresses of about −400 MPa at room temperature, which decrease monotonically with temperature to a near-zero value at 800 °C. Residual stresses in cobalt also decrease with increasing temperature, but show an apparent increase above 800 °C, which is attributed to an increase in lattice parameter due to W dissolution in the Co phase.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
D. Mari, B. Clausen, M.A.M. Bourke, K. Buss,