Dual-ion irradiation effects on microstructure of austenitic alloys

Y. Katoh; Y. Kohno; A. Kohyama

doi:10.1016/0022-3115(93)90100-D

Dual-ion irradiation effects on microstructure of austenitic alloys

Y. Katoh, Y. Kohno, A. Kohyama

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24 Scopus citations

Abstract

An Fe-15Cr-20Ni ternary model alloy and a Type 316 stainless steel were irradiated by dual-ions at 1 to 50 appm of He dpa ratios, to investigate the helium effects on microstructural development in austenitic alloys under irradiation. Quantitative analysis on resultant microstructures revealed that the Frank loop nucleation rate and the network dislocation density positively correlate and Frank loop growth rate negatively correlate with the He dpa ratio, while the cavity growth rate has its peak at an intermediate helium injection rate. Although He dpa dependence of various microstructural features were similar for the model alloy and the 316SS, the rates of their development and the mechanism which had assisted cavity growth were significantly different in these two materials.

Original language	English
Pages (from-to)	354-360
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	205
Issue number	C
DOIs	https://doi.org/10.1016/0022-3115(93)90100-D
State	Published - Oct 1993
Externally published	Yes

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10.1016/0022-3115(93)90100-D

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abstract = "An Fe-15Cr-20Ni ternary model alloy and a Type 316 stainless steel were irradiated by dual-ions at 1 to 50 appm of He dpa ratios, to investigate the helium effects on microstructural development in austenitic alloys under irradiation. Quantitative analysis on resultant microstructures revealed that the Frank loop nucleation rate and the network dislocation density positively correlate and Frank loop growth rate negatively correlate with the He dpa ratio, while the cavity growth rate has its peak at an intermediate helium injection rate. Although He dpa dependence of various microstructural features were similar for the model alloy and the 316SS, the rates of their development and the mechanism which had assisted cavity growth were significantly different in these two materials.",

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N2 - An Fe-15Cr-20Ni ternary model alloy and a Type 316 stainless steel were irradiated by dual-ions at 1 to 50 appm of He dpa ratios, to investigate the helium effects on microstructural development in austenitic alloys under irradiation. Quantitative analysis on resultant microstructures revealed that the Frank loop nucleation rate and the network dislocation density positively correlate and Frank loop growth rate negatively correlate with the He dpa ratio, while the cavity growth rate has its peak at an intermediate helium injection rate. Although He dpa dependence of various microstructural features were similar for the model alloy and the 316SS, the rates of their development and the mechanism which had assisted cavity growth were significantly different in these two materials.

AB - An Fe-15Cr-20Ni ternary model alloy and a Type 316 stainless steel were irradiated by dual-ions at 1 to 50 appm of He dpa ratios, to investigate the helium effects on microstructural development in austenitic alloys under irradiation. Quantitative analysis on resultant microstructures revealed that the Frank loop nucleation rate and the network dislocation density positively correlate and Frank loop growth rate negatively correlate with the He dpa ratio, while the cavity growth rate has its peak at an intermediate helium injection rate. Although He dpa dependence of various microstructural features were similar for the model alloy and the 316SS, the rates of their development and the mechanism which had assisted cavity growth were significantly different in these two materials.

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Dual-ion irradiation effects on microstructure of austenitic alloys

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