Photothermal Investigation of Cavitation Wear Protecting NiTi-Coatings |
| J. Gibkes a, B.K. Bein a, J. Pelzl a A. Wieck a, Th. Glokowski b, M. Pohl b, I. Delgadillo-Holtfort c, and M. Chirtoc d
a Institut für Experimentalphysik, Ruhr-Universität, D-44801 Bochum, Germany b Institute for Materials Science and Engineering, Ruhr-University, D-44801 Bochum, Germany c Instituto de Física de la Universidad de Guanajuato, IFUG, Apdo. E-143 León, Gto., Mexico d LTP, UTAP, Université de Reims, BP 1039, 51687 Reims Cedex 2, France |
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| Photothermal radiometry was applied to investigate the effect of abrasion by cavitation on steel which was supplied with a wear protecting NiTi film. Phase and amplitude data from areas on the sample which where damaged differently by the cavitation effect indicate the appearance of a three layer structure with the cavitation treatment. With cavitational impact the thermal diffusion time of the first layer decreases and an interfacial layer emerges which is identified as a surface region of the steel substrate which has undergone a stress induced transformation from an austenite to a martensite structure. |
| DOI: 10.12693/APhysPolA.114.A-103 PACS numbers: 62.20.Fe, 43.25.Yw, 78.20.Nv |