INVESTIGADORES
ALVAREZ Iris
artículos
Título:
Cyclic behavior of a superferritic stainless steel at room and intermediate
Autor/es:
S HEREÑU; MG MOSCATO; I ALVAREZ; A ARMAS
Revista:
INTERNATIONAL JOURNAL OF FATIGUE
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 65 p. 71 - 77
ISSN:
0142-1123
Resumen:
This paper
studies the fatigue behavior at room and intermediate temperatures of a
superferritic stainless steel UNS S 44600 that had received different heat
treatments. Thermal treatments at high temperature followed by water quenching
produces needle-like Cr2N precipitates that detrimentally affect the fatigue life
of superferritic stainless steels. At intermediate temperatures, independent of
previous thermal treatments, the occurrence of dynamic strain aging was
manifested by a pronounced cyclic hardening rate, inverse dependence of the
peak tensile stress with strain rate, a high dislocation density and modified dislocation
arrangements. Cycling at intermediate temperature demodulates the spinodal
decomposition with a fast velocity, improving the fatigue life of aged samples
.