Evaluation of Interfacial Fracture Behavior of HVAS Coating/Substrate System Using a Local Approach

Abstract:

In this paper, the local approach based on the Weibull stress criterion was used to investigate the interfacial fracture behavior between LX88A coating and Q345 steel. LX88A coating was deposited by high velocity electric arc spraying technology (HVAS). The finite element method (FEM) was used to analyze the stress-strain fields of the coating specimen which consisted of three different specimen geometrics or modes of loading. It was found that the Weibull stress for all specimen geometries was almost identical under the same fracture probability when the interfacial fracture initiation occurred for different specimen geometries. It showed that the geometry dependence on the interface brittle fracture toughness data can be reduced through application of the local approach, and the local approach can be used to describe the interfacial fracture behavior.

• Periodical: Solid State Phenomena (Volume 136)
• Pages: 125-132
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.136.125
• Online since: February 2008
• Authors: Lian Yong Xu, Hong Yang Jing, Jun Wei, Hui Zou
• Keywords: Coating, Finite Element Model (FEM), Interface Fracture, Local Approach, Weibull Stress

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