Zpět
Application of flash-pulse thermography methods for quantitative thickness inspection of coatings made by different thermal spraying technologies
| Citace: |
MUZIKA, L. ., ŠVANTNER, M. ., HOUDKOVÁ ŠIMŮNKOVÁ, Š. ., ŠULCOVÁ, P. . Application of flash-pulse thermography methods for quantitative thickness inspection of coatings made by different thermal spraying technologies. Surface and Coatings Technology, 2021, roč. 406, č. JAN 25 2021, s. NESTRÁNKOVÁNO. ISSN: 0257-8972
|
|---|---|
| Druh: | ČLÁNEK |
| Jazyk publikace: | eng |
| Anglický název: | Application of flash-pulse thermography methods for quantitative thickness inspection of coatings made by different thermal spraying technologies |
| Rok vydání: | 2021 |
| Autoři: | Ing. Lukáš Muzika , Ing. Michal Švantner Ph.D. , Ing. Šárka Houdková Šimůnková Ph.D. , Petra Šulcová |
| Abstrakt CZ: | Flash-pulzní termografie je metoda pro nedestruktivní testování materiálů založená na tepelné excitaci a sledování termografickou kamerou. V článku jsou řešeny možnosti kvantitativního vyhodnocení tloušťky povlaků pomocí flashpulzní termografie. Jsou porovnány různé metody vyhodnocení a je provedeno experimentální a numerické ověření. Testy jsou provedeny na povlacích žárových nástřiků Fe-Cr, Sn-Sb-Cu a WC-CoCr. Jsou prezentovány výsledky analýz citlivosti metody power-function a je ukázáno, že může být dosaženo citlivosti cca. 10 um pro povlaky v rozmezí tlouštěk od 74 do 1240 um. |
| Abstrakt EN: | Flash-pulse thermography is a nondestructive testing method, which is based on thermal excitation and response analysis of a tested sample. It is the traditional method for a non-destructive inspection of discontinuities and inhomogeneities at a sample surface, which is also applicable for a qualitative inspection of coating thickness variations. Possibilities of a quantitative inspection of the coating thickness are investigated numerically and experimentally in this contribution. Pulse-phase and power-function methods are compared and an ambiguity of the pulse-phase evaluation of coating thickness is presented on numerical computation results. Measurement and evaluation procedures are introduced and inspection results are presented for Fe-Cr, Sn-Sb-Cu and WC-CoCr coatings made by TWAS (Twin Wire Arc Spray), flame spraying and HVOF (High Velocity Oxygen Fuel) technologies, respectively. Sensitivity of a response of the power-function method to a change of thickness of the inspected coatings in a connection with their structure is presented. It is demonstrated, that a sensitivity of about 10 ?m can be achieved for the analyzed coatings of a thickness in the range 74-1240 ?m. |
| Klíčová slova |
Zpět