Plastic deformation phenomena during cold spray impact of WC-Co particles onto metal substrates

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• 作者：S. Dosta^a ; ^{sdosta@cptub.eu} ; Giovanni Bolelli^b ; ^{giovanni.bolelli@unimore.it} ; Alessia Candeli^b ; ^{alessia.candeli@unimore.it} ; Luca Lusvarghi^b ; ^{luca.lusvarghi@unimore.it} ; Irene Garcia Cano^a ; ^{igcano@cptub.eu} ; Josep Maria Guilemany^a ; ^{jmguilemany@ub.edu}
• 关键词：Kinetic spraying ; Impact behaviour ; Cermets ; Finite element modelling (FEM) ; Nanoindentation
• 刊名：Acta Materialia
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：124
• 期：Complete
• 页码：173-181
• 全文大小：3657 K
• 卷排序：124

文摘

This paper studies the plastic deformation phenomena in ductile substrates (Al7075 alloy, carbon steel) during cold spray-deposition of WC-Co. Metallographic inspection of etched cross-sections and through-thickness nano-hardness profiling indicate that plastic deformation of the substrate (into which undeformed WC-Co particles penetrate deep) is confined to a shallow area, below which the material appears unaltered.Adiabatic deformation phenomena in the substrate are revealed by finite element modelling of the impact process. Close to the surface, the temperature raises in less than 10 ns, leading to metal jetting, whilst the underlying material, below a depth of few micrometres, is substantially unaffected.