| Autor: |
Luton, M. J., Tegart, W. J. McG. |
| Zdroj: |
Materials Science & Technology; January 1976, Vol. 3 Issue: 1 p142-146, 5p |
| Abstrakt: |
The modes of fracture in nickel and three nickel–iron alloys have been examined over a range of true strain rates from 2·06 × 10−3to 3·96 s−1at temperatures from 762 to 1279° C. Fracture was initiated at triple points and at serrations in the original grain boundaries. Subsequent propagation was governed by the structural changes in the materials. If no recrystallization occurred, cracks spread rapidly along the grain boundaries and failure occurred at low strains. If recrystallization took place, the initial cracks were isolated and further growth occurred slowly in small increments to give failure at large strains. The initiation of cracking has been related to mechanisms proposed for creep rupture. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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