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[March 2003]
Latest Hard Material Research
A Measurement Note has been produced by NPL on fractographic assessment of porosity and fracture origins in PM materials. The Note demonstrates the use of the V-notch specimen configuration in fatigue.This technique produces data with a minimum scatter and to which Linear Elastic Fracture Mechanics (LEFM) can be readily applied to reconcile fatigue behaviour with pre-existing flaws and apparent subcritical flaw growth during fatigue where appropriate.
Other Measurement Notes and NPL reports include:
• pore shape characterisation of PM materials.
• the role of corrosion in the ball cratering wear test.
• step-wise erosion to determine the mechanisms of wear in gas borne particulate erosion of a WC/Co hardmetal.
• elastic modulus measurement using impact excitation.
To obtain copies, please contact the Materials Enquiry Point. For more detailed information, e-mail NPL's Martin Rides at: martin.rides@npl.co.uk
ENDS