MECHANICAL-PROPERTIES OF NEUTRON-IRRADIATED FE-CR AND FE-MN ALLOYS

Citation
A. Okada et al., MECHANICAL-PROPERTIES OF NEUTRON-IRRADIATED FE-CR AND FE-MN ALLOYS, Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy, 40(1), 1994, pp. 57-62
Citations number
8
Categorie Soggetti
Material Science","Metallurgy & Mining
ISSN journal
00408808
Volume
40
Issue
1
Year of publication
1994
Pages
57 - 62
Database
ISI
SICI code
0040-8808(1994)40:1<57:MONFAF>2.0.ZU;2-2
Abstract
The mechanical property change due to the evolution of defect structur es by the irradiation of neutrons was investigated on several Fe-Cr an d Fe-Mn alloys irradiated in the JMTR and FFTF. With increase in manga nese levels, dislocation loop density increases much larger than for c hromium levels in irradiation in the JMTR, while in the FFTF, dislocat ion density of the Fe-Cr alloys is much larger than in the Fe-Mn alloy s. This reverse trend is brought about by the saturation in the develo pment of dislocation loops. The Fe-0.1 and 0.4%Cr whose dislocation de nsity is much lower than that of the Fe-2%Mn showed the increment in y ield strength almost the same as that of the Fe-2%Cr and rather larger than that of the Fe-2%Mn, respectively, in the JMTR. Yield strength i ncrease without significant variation in the strain hardening exponent is observed for the Fe-0.1%Cr and Fe-O.1%Mn irradiated in the FFTF an d very small voids are observed in the Fe-0.1%Mn irradiated in the JMT R. These results suggest the existence of invisible defect clusters pr oduced by irradiation.