Fracture of amorphous Ni-Pd-P alloys
- 1 August 1975
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 32 (2) , 457-470
- https://doi.org/10.1080/14786437508219968
Abstract
Mechanical behaviour, deformation and fracture have been investigated for amorphous Ni-Pd-P alloys made by an improved Pond and Maddin method. The stress-strain curves of Ni55Pd35P10 and Ni63Pd17P20 show quasi-brittle behaviour with average fracture stresses of 149 and 142 kg/mm2, respectively. These stresses are high in comparison with those of normal metals and alloys. The elongations are small, 0·042 and 0·023% for Ni55Pd35P10 and Ni63Pd17P20, respectively, as is the elongation of all amorphous alloys. Fracture surfaces observed with a scanning electron microscope show two distinct regions, a featureless zone and one called a ‘vein’ or ‘ridge’ pattern. A suggested grease model gives a good simulation of the actual fracture morphology.Keywords
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