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5497 |
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Friday, June 09, 2017, Hall 28 11:00 AM Cold Gas Spraying III |
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Low pressure spray of stainless steel based composite coatings, particle strain localization process |
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Volf Leshchynsky* / University of Windsor, Canada Roman Maev / Institute for Diagnostic Imaging Research, CANADA Emil Strumban/ Institute for Diagnostic Imaging Research, CANADA DMITRY Dzhurinsky/ Institute for Diagnostic Imaging Research, CANADA ELENA Maeva/ Institute for Diagnostic Imaging Research, CANADA |
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Understanding the complex mechanical behavior of stainless steel based composite coatings is important for engineering applications. The focus of this research was on gaining a fundamental understanding of the structure/property relationships that exist during structure formation of the coatings made by new low pressure cold spraying technology with propellant gas heated up to temperatures of 800-1000oC (warm spray). While composition is one of the key parameter in determining the final microstructure, the specific warm spray powder shock consolidation parameters (particle velocity, particle-gas mass flow ratio and gas temperature) were found to have significant effects on the development of composite structure formation and mechanical properties. Microstructural examination and modeling results revealed that in the case of warm spraying, the strain localization mechanism differs from that of adiabatic shear band formation that results in large differences in the ensuing microstructure of the composite coating and its properties. The structure-property relationship for examined coatings will be presented and discussed based on new physical model of strain localization. |