TY - JOUR
T1 - Quantifying the Effects of Carbides and Pores on Fatigue Damages of Ni-Based Single Crystal Superalloys at Elevated Temperature Using X-Ray CT Scans
AU - Liu, Keli
AU - Zhang, Chi
AU - Wang, Junsheng
AU - Xue, Chengpeng
AU - Wang, Bing
AU - Zhang, Mingshan
AU - Yang, Yanhong
AU - Zhou, Yizhou
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2022/6
Y1 - 2022/6
N2 - Although the effects of pores and carbides on the high temperature fatigue performance of nickel-based single crystal superalloys have been studied for decades, few studies have statistically compared their damage effects and identified the most detrimental factors. X-ray computed tomography has been used to collect the microstructure variations while the fatigue damage happens at high temperature. Combining image registration and deep learning algorithm, both carbides and pores have been extracted and quantified by a new damage factor. It shows that pores are more harmful than carbides during crack initiation, and carbides are more significant than pores during the crack propagation stage at elevated temperatures. Furthermore, by developing a multiple linear regression model, the damage effects of pore size, morphology, spacing, and distance to the sample surface on the crack initiation and propagation stage were differentiated. It is found that pore spacing is the most important factor for crack initiation.
AB - Although the effects of pores and carbides on the high temperature fatigue performance of nickel-based single crystal superalloys have been studied for decades, few studies have statistically compared their damage effects and identified the most detrimental factors. X-ray computed tomography has been used to collect the microstructure variations while the fatigue damage happens at high temperature. Combining image registration and deep learning algorithm, both carbides and pores have been extracted and quantified by a new damage factor. It shows that pores are more harmful than carbides during crack initiation, and carbides are more significant than pores during the crack propagation stage at elevated temperatures. Furthermore, by developing a multiple linear regression model, the damage effects of pore size, morphology, spacing, and distance to the sample surface on the crack initiation and propagation stage were differentiated. It is found that pore spacing is the most important factor for crack initiation.
KW - Carbide
KW - High temperature fatigue
KW - Ni-based superalloys
KW - Porosity
KW - X-CT
UR - http://www.scopus.com/inward/record.url?scp=85131015627&partnerID=8YFLogxK
U2 - 10.1007/s10921-022-00877-y
DO - 10.1007/s10921-022-00877-y
M3 - Article
AN - SCOPUS:85131015627
SN - 0195-9298
VL - 41
JO - Journal of Nondestructive Evaluation
JF - Journal of Nondestructive Evaluation
IS - 2
M1 - 47
ER -