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The low cycle fatigue properties of the IF-B alloy, which is a new developed alloy for fusion reactor first wall components, were analysed at 450 C and compared with those of AISI 316 and AMCR 0033 alloys. The fatigue life of the IF-B alloy proved better than AISI 316 below a total strain range of 1.5 % and than AMCR 0033 in the whole testing range. The presence of a marked strain hardening, which is saturated at different values depending on the total strain range imposed, was observed. The analysis of fracture surfaces by scanning electron microscopy shows that crack initiation occurs on the surface of the specimens and propagates in the transgranular mode with the presence of fatigue striations.

Additional information

Authors: MARCHIONNI M, CNR-ITM, Cinisello B (IT);BOERMAN D J, JRC Ispra (IT)
Bibliographic Reference: Article: Journal of Nuclear Materials
Record Number: 199510969 / Last updated on: 1995-08-10
Original language: en
Available languages: en