Influence of the Preliminary Heating of А7075 Aluminum Alloy on the Strength of a SiC-Containing Composite Coating
| Autor: | Yu. Yu. Varyvoda, Т. М. Lenkovs’kyi, M. М. Student, Yu. V. Mol’kov, Kh. R. Zadorozhna |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Digital image correlation
Structural material Materials science 020209 energy Mechanical Engineering Alloy Composite number chemistry.chemical_element 02 engineering and technology engineering.material Condensed Matter Physics Carbide chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Coating Mechanics of Materials Aluminium 0202 electrical engineering electronic engineering information engineering engineering Silicon carbide General Materials Science Composite material |
| Zdroj: | Materials Science. 55:396-401 |
| ISSN: | 1573-885X 1068-820X |
| DOI: | 10.1007/s11003-019-00316-w |
| Popis: | We created composite coatings on the surfaces of A7075 aluminum alloy by the method of laser melting of the substrate and injection of highly dispersed silicon-carbide (SiC) particles with additional preheating of the base metal and without it. The method of digital image correlation is adapted for the evaluation of the elastoplastic deformation of the material in different zones of the coating. The averaged values of local critical strains are obtained for the coated specimens under the conditions of static bending. It is shown that the preliminary heating of the substrate up to 100°C weakly affects the deformability of the heat-affected zone as compared with heating up to 250°C or without it. At the same time, we show that the fracture force and critical deflection of the specimens preheated to 100°C become higher (almost by one-third) than for the specimens without heating. This can be explained by the formation of Al4C3 aluminum carbides on the boundaries of silicon carbide (SiC) particles. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink