![]() Theoretical analysis reveals that the cleavage cracking is the result of brittle coating and its fracture, which synergically inhibit the local plastic deformation of the underlying substrate via two mechanisms. In the present work, by performing room-temperature uniaxial tension experiments with a 10 −4 s −1 straining rate, we have observed cleavage cracking in ductile-metal substrates (pure iron, AISI 1020 steel and brass) coated with WC-10%Co-4%Cr. The cracking mode of the substrates is unclear and the corresponding mechanism remains poorly understood. Recent experimental observations show that the fracture of a brittle coating can cause the micro-cracking of the ductile metal substrates, threatening the safety and reliability of engineering structures. Brittle coatings are often used to protect underlying ductile substrates from damage. ![]()
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February 2023
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