Fracture toughness test method

Details Fracture toughness test method Fracture toughness test method

G - Physics

01

N

73/89

G01N 3/16 (2006.01)

Patent

CA 1075930

ABSTRACT OF THE DISCLOSURE An improved method for testing fracture toughness of tungsten carbide, and more particularly sintered tungsten carbide, consists of preparing a specimen from a short rod of sample material by cutting thin longitudinal slots forming a V within the slotted portion of the sample. An initial crack is started at the tip of the V formed by the slots. After the initial crack is started, the specimen is loaded with a force perpendicular to the slot plane and the peak force required in advancing the crack is recorded. The peak force is linearly related to the critical stress intensity factor (fracture toughness) of the specimen material.

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