Microstructure and cavitation behavior of laser-cladded GH4169 coatings with various WC additions
Source abstract
Abstract
To improve the cavitation erosion resistance of submarine propeller blades, GH4169 composite coatings with tungsten carbide (WC) contents ranging from 0% to 60% were fabricated on the 316L substrate via laser cladding. Scanning electron microscopy and ultrasonic cavitation tests were adopted to systematically investigate the effects of WC content on the microstructure evolution and cavitation behavior of the coatings. The results show that the addition of WC significantly optimizes the microstructure and comprehensive properties of the coatings. The coating with 20% WC exhibits the best cavitation erosion resistance, featuring the minimum mass loss, shallow and uniformly distributed erosion pits, as well as the lowest pit damage area ratio of only 1.53%. Mechanism analysis reveals that well-dispersed WC particles can effectively resist the impact of microjets and inhibit crack propagation. Excessive WC addition leads to particle agglomeration and weakened interfacial bonding, which in turn aggravates coating damage.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Cavitation Phenomena in Pumps · Erosion and Abrasive Machining · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Taiyuan University of Science and Technology 1 , Taiyuan, Shanxi 030024,
Shanxi Innovation Center of Metal Joining and Additive Manufacturing Technology 2 , Taiyuan, Shanxi 030024,
Funding
Ministry of Education/Zhejiang Provincial Key Laboratory of Special Equipment Manufacturing and Advanced Processing Technology Research open fund · Key Core Technology Project of Taiyuan City · Shanxi science and technology exchange and cooperation program
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Show source-provided references
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