Using optical diagnostics to determine the melt temperature field in layer-by-layer laser alloying of metal powder
| Autor: | Yu. N. Zavalov, F. Kh. Mirzade, N. G. Dubrovin, V. D. Dubrov, E. S. Makarova, A. V. Dubrov |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Field (physics) 010308 nuclear & particles physics Layer by layer Radiation Laser 01 natural sciences law.invention Metal Temperature gradient law visual_art 0103 physical sciences visual_art.visual_art_medium Metal powder Composite material Pyrometer |
| Zdroj: | Technical Physics Letters. 43:627-630 |
| ISSN: | 1090-6533 1063-7850 |
| Popis: | The results of application of optical diagnostics in the estimation of the temperature field at the melt surface in layer-by-layer laser alloying of metal powder are presented. It is demonstrated that surface concavity induced by the thermocapillary effect upon nonuniform heating may distort pyrometry data considerably. The use of external illumination provides an opportunity to determine the shape of the melt surface. The obtained minimum estimate of the temperature gradient in the metal region affected by laser radiation is 2.8 × 104 K/cm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|