Determination of residual stresses in metal coatings thermally sprayed on Al2O3 substrate
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Abstract
The paper presents the results of research and analysis of residual stresses in titanium and copper coatings deposited onto Al2O3 substrate using HVOF thermal spraying method. Residual stresses were determined in an experimental way, analytical and numerical using X-ray method, sample curvature measurement, grating interferometry method and numerical modeling (FEM). A comparison of the stresses obtained in the Ti and Cu sprayed coatings has been performed. All the methods showed the presence of tensile stresses in the coating of different magnitude depending on the applied method.
in polish
Badania naprężeń własnych w powłokach metalowych natryskiwanych na podłoże ceramiki Al2O3
W pracy przedstawiono wyniki badań i analizy naprężeń własnych w powłokach tytanowych i miedzianych nanoszonych na podłoże ceramiki Al2O3 metodą natryskiwania naddźwiękowego HVOF. Naprężenia wyznaczano w sposób eksperymentalny, analityczny oraz numeryczny z wykorzystaniem takich narzędzi jak metoda rentgenowska (X-ray), pomiary krzywizny wygięcia, metoda interferometrii siatkowej oraz numeryczne modelowanie (MES). Dokonano porównania naprężeń w natryskiwanych powłokach Ti i Cu. Wszystkie metody wykazały występowanie naprężeń rozciągających w powłoce o wartościach zróżnicowanych zależnych od metody badań.
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