N. Yamamoto et al., THE EFFECT OF MC AND MN STABILIZER ADDITIONS ON THE CREEP-RUPTURE PROPERTIES OF HELIUM IMPLANTED FE-25-PERCENT-NI-15-PERCENT-CR-AUSTENITIC-ALLOY, Journal of nuclear materials, 226(1-2), 1995, pp. 185-196
Citations number
45
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
Helium embrittlement resistance of Fe-25% Ni-15% Cr austenitic alloys
with various MX (M = V, Ti, Nb, Zr; X = C, N) stabilizers was compared
through post helium implantation creep testing at 923 K. While signif
icant deterioration by helium in terms of creep rupture time and elong
ation occurred for all materials investigated, the suppression of the
deterioration, especially in rupture time, was discerned for the mater
ials in which semi-coherent MC (M = Ti, Ti + Nb, V + Ti) particles wer
e distributed at high density. The material which contains the incoher
ent M,C, as predominant precipitates seems to be less degraded by heli
um than those containing the MXs (M = Zr, V; X = C, N), if compared at
the same number density of precipitates. Therefore, it is suggested t
hat the high density dispersion of incoherent M(23)C(6) as well as sem
i-coherent Ti containing MC particles would be beneficial in reducing
the detrimental helium influences on mechanical properties.