@Article{icces.2024.011878,
AUTHOR = {Qiuyi Wang, Rong Yang, Bo Chen, Rui Bao},
TITLE = {Effects of Hold Time on Fatigue Crack Growth Behavior in PBF-EB Inconel 718},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {29},
YEAR = {2024},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v29n1/58244},
ISSN = {1933-2815},
ABSTRACT = {Effects of hold time on the fatigue crack growth behavior in electron-beam powder-bed-fusion (PBF-EB) Inconel 718 alloy at 650 ∘C have been investigated in this study, with focuses on the anisotropic fatigue cracking resistance and fracture mechanism. The V-type specimen (which loading parallel to the columnar grain boundaries) gives better dwell-fatigue cracking resistance to the H-type specimen (which loading perpendicular to the columnar grain boundaries) due to its large deflections (nearly 90 °) on the crack path. These deflections are related to the change of crack growth mechanism. In both V-type and H-type specimens, when the dwell-fatigue crack tip reaches high angle grain boundaries, the crack exhibits a intergranular propagation behaviour. Besides, discontinuous secondary crack which associated with high angle grain boundaries can be seen in the H-type specimen, indicating that the crack mechanism may be predominantly creep damage.},
DOI = {10.32604/icces.2024.011878}
}