Microstructural evolution during high temperature dwell-fatigue of austenitic stainless steels
نویسندگان
چکیده
Microstructural evolution related to the mechanical response from isothermal dwell-fatigue testing at 700 °C of two austenitic steels, Esshete 1250 and Sanicro 25, is reported. Coherent Cu-precipitates incoherent Nb-carbides were found impede dislocation motion, increase hardening improving high temperature properties 25. Sparsely placed intergranular Cr- made susceptible creep damage crack propagation, mainly interaction carbides fatigue induced slip bands. Dynamic recrystallization plastic zone tip appeared affect propagation 25 by providing an energetically privileged path.
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ژورنال
عنوان ژورنال: International Journal of Fatigue
سال: 2021
ISSN: ['1879-3452', '0142-1123']
DOI: https://doi.org/10.1016/j.ijfatigue.2020.105990