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Volume 25, Issue 1
  • ISSN: 0032-1400


The effect of the cyclic stress intensity on the growth rates of fatigue cracks in the platinum metals in air can be predicted on the basis of established correlation equations. These suggest an inverse relationship between the growth rate of fatigue cracks in a material and its elastic modulus, and this has been experimentally confirmed for platinum and palladium and for a 30 per cent rhodium-platinum alloy. It may therefore be expected that ruthenium and rhodium have a higher resistance to fatigue crack growth than most other metals. Osmium and iridium may have absolutely the highest resistance to fatigue crack growth of all metallic materials. The effect of an evacuated test environment is also considered.


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  • Article Type: Research Article
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