TY - JOUR
T1 - Thermomechanical fatigue and life prediction method of a precision cast superalloy with electrical discharge machining drilled holes
AU - Song, Xing
AU - Jiang, Yun
AU - Hu, Xiaoan
AU - Nie, Xiangfan
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/1
Y1 - 2023/1
N2 - Thermomechanical fatigue behavior of a directional solidified superalloy was investigated. Circular holes were designed on the specimen manufactured by precision cast method. The results indicated that the TMF damage is mainly controlled by fatigue, creep and oxidation damage, and the stress concentration at the holes results in crack nucleation and final failure. A new TMF life prediction method for specimens with stress concentration is proposed. The stress gradient is introduced to consider the effect of stress concentration at hole and notch in this method, which is verified by TMF data of smooth, notched and hole specimens.
AB - Thermomechanical fatigue behavior of a directional solidified superalloy was investigated. Circular holes were designed on the specimen manufactured by precision cast method. The results indicated that the TMF damage is mainly controlled by fatigue, creep and oxidation damage, and the stress concentration at the holes results in crack nucleation and final failure. A new TMF life prediction method for specimens with stress concentration is proposed. The stress gradient is introduced to consider the effect of stress concentration at hole and notch in this method, which is verified by TMF data of smooth, notched and hole specimens.
KW - Electrical discharge machining drilled holes
KW - Nickel-based superalloy
KW - Thermomechanical fatigue
KW - TMF life prediction
UR - https://www.scopus.com/pages/publications/85138113123
U2 - 10.1016/j.ijfatigue.2022.107253
DO - 10.1016/j.ijfatigue.2022.107253
M3 - 文章
AN - SCOPUS:85138113123
SN - 0142-1123
VL - 166
JO - International Journal of Fatigue
JF - International Journal of Fatigue
M1 - 107253
ER -