Abstract
Pronounced porosity, decreasing with distance from the fracture surface, is found in the necked region of tensile specimens tested at room temperature or liquid nitrogen temperature. A hydrogen solution treatment followed by a quench prevents pore formation in tests at —196°C, but has little effect on tests made at room temperature. Reduction of area values at —196°C are strikingly improved by the same treatment, but show no improvement in room temperature tests. The experimental results support the hypothesis that strain-induced porosity results with hydride initially present or, in material containing less than 50 ppm H, with hydride precipitated by strain aging.
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TP 4088E. Manuscript, Apr. 12, 1955. Philadelphia Meeting, October 1955.
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Forscher, F. Strain-Induced Porosity and Hydrogen Embrittlement in Zirconium. JOM 8, 536–543 (1956). https://doi.org/10.1007/BF03377724
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DOI: https://doi.org/10.1007/BF03377724