Milman, YVLuyckx, SNorthrop, IT2007-02-062007-06-072007-02-062007-06-071999Milman, YV, Luyckx, S and Northrop, IT. 1999. Influence of temperature, grain size and cobalt content on the hardness of WC-Co alloys. International Journal of Refractory Metals and Hard Materials, vol 17, 3 January, pp 39-440263-4368http://hdl.handle.net/10204/1490http://hdl.handle.net/10204/1490The Vickers hardness of WC-Co alloys has been measured at temperatures ranging from -196 to 900 degrees C. The cobalt content of the alloys ranged from 10 to 24 vol% and the grain size from 0.5 to 2.3 um. It was found that, at all cobalt contents and all temperatures, the decrease in hardness with increasing grain size can be approximated by a Hall-Fetch type relationship. Up to about 600 degrees C the decrease in hardness with increasing temperature appears to be due mostly to the decrease in the intrinsic hardness of the individual phases. Above 600 degrees C the decrease in hardness appears to be due mostly to easier slip transfer across grain boundaries. Finer grained alloys have been found to preserve their hardness at high temperature better than coarser grained alloys, at all cobalt contents.537545 bytesapplication/pdfenCopyright: 1999 Elsevier Science LtdGrain size measurementsTemperature measurementsWC-CO alloysVickers hardnessMaterials sciencesMetallurgical engineeringArticleMilman, Y., Luyckx, S., & Northrop, I. (1999). Influence of temperature, grain size and cobalt content on the hardness of WC-Co alloys. http://hdl.handle.net/10204/1490Milman, YV, S Luyckx, and IT Northrop "Influence of temperature, grain size and cobalt content on the hardness of WC-Co alloys." (1999) http://hdl.handle.net/10204/1490Milman Y, Luyckx S, Northrop I. Influence of temperature, grain size and cobalt content on the hardness of WC-Co alloys. 1999; http://hdl.handle.net/10204/1490.TY - Article AU - Milman, YV AU - Luyckx, S AU - Northrop, IT AB - The Vickers hardness of WC-Co alloys has been measured at temperatures ranging from -196 to 900 degrees C. The cobalt content of the alloys ranged from 10 to 24 vol% and the grain size from 0.5 to 2.3 um. It was found that, at all cobalt contents and all temperatures, the decrease in hardness with increasing grain size can be approximated by a Hall-Fetch type relationship. Up to about 600 degrees C the decrease in hardness with increasing temperature appears to be due mostly to the decrease in the intrinsic hardness of the individual phases. Above 600 degrees C the decrease in hardness appears to be due mostly to easier slip transfer across grain boundaries. Finer grained alloys have been found to preserve their hardness at high temperature better than coarser grained alloys, at all cobalt contents. DA - 1999 DB - ResearchSpace DP - CSIR KW - Grain size measurements KW - Temperature measurements KW - WC-CO alloys KW - Vickers hardness KW - Materials sciences KW - Metallurgical engineering LK - https://researchspace.csir.co.za PY - 1999 SM - 0263-4368 T1 - Influence of temperature, grain size and cobalt content on the hardness of WC-Co alloys TI - Influence of temperature, grain size and cobalt content on the hardness of WC-Co alloys UR - http://hdl.handle.net/10204/1490 ER -