SYMPOSIA PAPER Published: 01 January 1984
STP32735S

The Effect of Binder Chemistry on the Fracture Toughness of Cemented Tungsten Carbides

Source

The fracture toughness of WC-10Co compositions with varying carbon concentrations were investigated. Both the material property, KIcSR and the apparent toughness, KQ, decreased rapidly upon the appearance of eta carbides in the microstructure. The amount of tungsten in the cobalt binder, as well as the presence of free carbon or eta carbides in the microstructure, affected the magnitude of the macroscopic residual stresses in the cermet.

The fracture toughness of compositions in which varying amounts of nickel had been substituted for cobalt were also investigated. It was found that up to 25% nickel could be substituted for cobalt without adversely affecting the fracture toughness or the hardness of the cermet.

Author Information

Tingle, JR
Vermont American Corporation, Louisville, Ky.
Shumaker, CA
Vermont American Corporation, Louisville, Ky.
Jones, DP
Vermont American Corporation, Louisville, Ky.
Cutler, RA
Ceramatec, Inc., Salt Lake City, Utah
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Details
Developed by Committee: E08
Pages: 281–296
DOI: 10.1520/STP32735S
ISBN-EB: 978-0-8031-4917-5
ISBN-13: 978-0-8031-0401-3