The effect of hydrostatic pressure on yielding in iron
- 1 February 1964
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 9 (98), 285-297
- https://doi.org/10.1080/14786436408229192
Abstract
Armco iron normally shows a sharp yield point in tension at atmospheric temperature and pressure. This yield is either absent or substantially reduced in specimens subjected to hydrostatic pressures of 103–104 atmospheres prior to test. Removal of the yield point indicates that free dislocations are created during pressurization, apparently at elastic inhomogeneities such as inclusions. Evidence is presented to support this view, e.g. the fact that high-purity iron is not greatly affected by pressure. The observations are discussed in terms of recent theories of the influence of free dislocations on yielding.Keywords
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