Evolution of Elastic Properties of Cold Sprayed Metal Coatings at Elevated Temperatures |
| M. Janovskáa, H. Seinera, J. Či v zekb, c, P. Sedláka, M. Landaa
aInstitute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 5, Praha 180 00, Czech Republic bNetme Centre, Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czech Republic cInstitute of Plasma Physics, Academy of Sciences of the Czech Republic, Za Slovankou 1782/3, 182 00 Prague, Czech Republic |
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| Resonant ultrasound spectroscopy was applied to analyze the temperature evolution of shear modulus of thick aluminum, nickel, copper and titanium coatings prepared by cold spraying in the temperature range 20°→560°→20°. The results show that the thermal cycle leads to a significant increase in the shear modulus of nickel, while for copper, titanium and aluminum the shear modulus remains nearly unchanged or exhibits a weak increase only. Evolution of the internal friction parameter shows a significant decrease after the thermal cycle, being the most pronounced for nickel again. The decrease of the internal friction observed in the studied coatings indicates grain coarsening and consequent lower influence of grain boundary sliding. |
DOI:10.12693/APhysPolA.134.794 PACS numbers: 62.20.D-, 81.15.Rs |