SYMPOSIA PAPER Published: 01 January 1970
STP26651S

Correlation Between the Mechanical Properties and Microstructure of Irradiated Iron and Low-Carbon Steel

Source

The radiation hardening of iron and low-carbon steel was studied on the basis of transmission electron microscopy and tension test data. No visible defects were observed in the iron specimens after irradiation to 3.5×1019 n/cm2, E>1 MeV, at 35 C, as well as after postirradiation annealing at 150 C. Marked microstructural changes occurred in steel irradiated to 2.5×1018 n/cm2 both at 320 C and 450 C. In the former case a 5.1×109 cm-2 increase in dislocation density was found, while in the latter the presence of small dislocation loops of average diameter 200 Å and density 2.4×1014 cm-3 was observed.

The approximative theoretical values of yield stress increment were calculated using the models for hardening by small dislocation loops and by a dislocation forest and were compared with the experimental values of the yield stress increment. A satisfactory agreement was obtained.

Author Information

Stefanović, VM
Boris Kidric Institute of Nuclear Sciences, Vinca, Yugoslavia
Milašin, NLj
Boris Kidric Institute of Nuclear Sciences, Vinca, Yugoslavia
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Developed by Committee: E10
Pages: 521–536
DOI: 10.1520/STP26651S
ISBN-EB: 978-0-8031-4593-1
ISBN-13: 978-0-8031-0014-5