Low cycle fatigue of a single crystal CoNi-base superalloy
نویسندگان
چکیده
The low cycle fatigue response of a single crystal γ′-containing CoNi-base superalloy has been investigated in air and vacuum at 950 °C. performance is demonstrated to be similar the 1st-generation Ni-base AM1. Fracture surface imaging cross-sections on both alloys reveal that oxidation-assisted cracking responsible for crack initiation air. improves under as transitions internal casting pores retained from solidification process. Recrystallized regions fracture surfaces vacuum-tested samples are identified by electron backscattered diffraction, which not previously reported these test conditions. role base element (Ni- vs. CoNi- Co-base) discussed.
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ژورنال
عنوان ژورنال: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
سال: 2021
ISSN: ['0921-5093', '1873-4936']
DOI: https://doi.org/10.1016/j.msea.2021.142007