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Effect of a Laser Pre-quenched Steel Substrate Surface on the Crack Driving Force in a Coating–steel Substrate System by Ban-Quan Yang; Kun Zhang; Guang-Nan Chen; Geng-Xing Luo; Jing-Hua Xiao is a Engineering article available to read on EtoBox.

What is Effect of a Laser Pre-quenched Steel Substrate Surface on the Crack Driving Force in a Coating–steel Substrate System about?

A mechanical model of a coating/laser pre-quenched steel substrate specimen with a crack oriented perpendicular to the interface between the coating and the hardened layer is developed to quantify the effects of the residual stress and hardness gradient on the crack driving force in terms of the J-integral. It is assumed that the crack tip is in the middle of the hardened layer of the pre-quenched steel substrate. Using a composite double cantilever beam model, analytical solutions can be derived, and these can be used to quantify the effects of the residual stress and the hardness gradient resulting from the pre-quenched steel substrate surface on the crack driving force. A numerical example is presented to investigate how the residual compressive stress, the coefficient linking microhardness and yield strength and the Young's modulus ratio of the hardened layer to the coating influence the crack driving force for a given crack length.

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Author

Ban-Quan Yang; Kun Zhang; Guang-Nan Chen; Geng-Xing Luo; Jing-Hua Xiao

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1359-6454)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)