SYMPOSIA PAPER Published: 01 January 1973

Attrition and Stabilization of Void Nuclei: Critical Nucleus Size


Computer experiments were performed on the effect of impurity atoms, hydrostatic pressure, uniaxial tension, and radiation attrition on void nucleus stability in alpha-iron. The critical void nucleus size was found to be a 44-vacancy octahedral (bipyramidal) void with (110) facets. Helium atoms, oversize metallic impurity atoms, and carbon-vacancy complexes served as strong centers for heterogeneous nucleation of voids. Carbon-vacancy complexes at void apexes and corners inhibited thermal dissociation. The amount and tenacity of vacancy trapping by carbon atoms increased with hydrostatic pressure up to 110 kilobars.

Author Information

Beeler, JR
North Carolina State University, Raleigh, N.C
Beeler, MF
North Carolina State University, Raleigh, N.C
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Developed by Committee: E10
Pages: 289–302
DOI: 10.1520/STP35455S
ISBN-EB: 978-0-8031-4627-3
ISBN-13: 978-0-8031-0328-3