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Report No.

Microstructural effect of solute addition for Fe-15Cr-20Ni steels irradiated in Joyo

Fukumoto, Kenichi*; Matsui, Hideki*; Akasaka, Naoaki; Yamagata, Ichiro 

The relationship between the addition of minor element and the swelling behavior was investigated using nine heats of Fe-15Cr-20Ni austenitic model alloys, Fe-15Cr-xNi(x = 20, 25 and 30) and a PNC1520 steel irradiated at 480, 570, 620 and 700 $$^{circ}$$C in the Joyo to doses of 20-56 dpa. Phosphorus and boron suppressed the appearance of swelling for these experimental irradiation conditions. Additions of titanium and niobium were effective for suppression of swelling at low temperature, below 570 $$^{circ}$$C. Complicated microstructural dependence of nickel contents for Fe-15Cr-xNi alloys could be seen.



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