Structural Features of the Alloyed Layers Formed by Electron Beam Melting in Air
| Autor: | L. V. Chuchkova, E A Lozhkina, Aleksandr Belov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Cladding (metalworking) Materials science Titanium carbide Izod impact strength test 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Indentation hardness chemistry.chemical_compound Coating chemistry Phase (matter) 0103 physical sciences engineering Graphite Composite material 0210 nano-technology Powder mixture |
| Zdroj: | Materials Today: Proceedings. 11:375-379 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2018.12.161 |
| Popis: | The results of investigations of structural features and mechanical properties of functional gradient materials formed by electron beam melting of various powder mixtures are presented in the paper. Changing the composition of the initial powder portion and treatment modes made it possible to obtain composites containing high-strength titanium carbide particles. It was detected that all materials have the same defect in the form of an undissolved graphite powder located in the upper zone of the surface layers. Cladding of a two-component powder mixture (Ti and C) resulted in the formation of a coating with a thickness of 1.7 mm and allowed to increase the microhardness of the base material from 3 200 to 4 200 MPa. However, the impact strength of the formed composites with a gradient structure is lower than that of the base material, which is associated with the formation of a solid embrittlling phase of titanium carbide. |
| Databáze: | OpenAIRE |
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