Journal
SURFACE & COATINGS TECHNOLOGY
Volume 321, Issue -, Pages 74-80Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2017.04.044
Keywords
Nickel-base superalloys; Laser shock processing (ISP); Fatigue; Fracture
Funding
- High Technology Research and Development Program of China [2014AA041701]
- National Natural Science Foundation of China [51171179, 51271174, 51331005, 51501219, 11332010]
- Natural Science Foundation of Liaoning Province in China [2015020115]
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Isothermal fatigue testing was conducted on single crystal nickel-base superalloys. Distinct cracking behaviors were found to occur in the specimens treated by different laser shock processing (ISP) technologies. A crack generally initiates from the casting micropore. For the well surface strengthened specimens suffered high laser shock intensities, the crack initially grows along one or more of the {111} planes and falls on the edge of the cylindrical specimen. For the poorly strengthened specimens, the final fracture area is usually located inside. (C) 2017 Elsevier B.V. All rights reserved.
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