@Article{jrm.2021.011596,
AUTHOR = {Qiaoxin Zhang, Rui Chen, Ding Jin, Chen Zhou, Xuewu Li},
TITLE = {The Effects of Different Post-Heat Treatments on Rolling Contact Fatigue Behaviors of Direct Laser Cladding Inconel 625 Coatings},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {9},
YEAR = {2021},
NUMBER = {1},
PAGES = {129--144},
URL = {http://www.techscience.com/jrm/v9n1/40707},
ISSN = {2164-6341},
ABSTRACT = {In this paper, the microstructures and rolling contact fatigue behaviors
of laser cladding Inconel 625 coatings with or without post-heat treatments were
analyzed. The results revealed that the fatigue resistance of the laser cladding
coating after any post-heat treatment was worse than that of the as-deposited coating. First, through the finite element analysis, the distribution of stress along the
thickness direction of the coating was obtained, and it was concluded that the
bonding interface between the coating and the matrix had little effect on the fatigue properties of the coating. Then X-ray diffraction (XRD), scanning electron
microscopy (SEM) and energy dispersive spectrometry (EDS) were used to analyze the microstructure and failure morphology. The results revealed that the subsurface failure morphology of the coatings showed a consistent correlation with
rolling fatigue property after different heat treatments. The TCP phase and carbides have been shown in the laser cladding coating. The coating after stress
relieved annealing exhibited chain-shaped granular carbides on the grain boundaries which could accelerate crack propagation. The aging heat treatment made
small amounts of Laves phase dissolved in the coating, while the dispersed phase
was precipitated which could result in the formation of pores. And the solution
treatment made large amounts of Laves phase dissolved, while the rod-shape brittle phases were generated which was easy to fracture and contribute to crack
initiation and spalling.},
DOI = {10.32604/jrm.2021.011596}
}