Residual Stresses and Young's Moduli of Plasma Sprayed W+Cu Composites and FGMs Determined by In Situ Curvature Method

0428019 - ÚFP 2015 RIV CH eng C - Conference Paper (international conference)
Matějíček, Jiří - Mušálek, Radek - Chráska, Pavel
Residual Stresses and Young's Moduli of Plasma Sprayed W+Cu Composites and FGMs Determined by In Situ Curvature Method.
Key Engineering Materials. Vol. 606. Zurich: Trans Tech Publications Ltd, 2014 - (Haušíld, P.; Materna, A.; Vilémová, M.), s. 151-154. 606. ISSN 1662-9795.
[International Conference on Local Mechanical Properties, LMP 2013/10./. Kutná Hora (CZ), 06.11.2013-08.11.2013]
R&D Projects: GA ČR(CZ) GAP108/12/1872; GA MŠMT ME 901
Institutional support: RVO:61389021
Keywords : plasma spraying * FGM * residual stress * Young’s modulus * curvature method
Subject RIV: JI - Composite Materials

In this work, application of the in-situ curvature method on plasma sprayed composite and graded coatings is presented. First, uniform composites of different W/Cu ratio, were sprayed by water stabilized plasma. By continuous monitoring of the curvature of a flat specimen during spraying, the stress evolution throughout the entire history of coating formation was traced. By a simultaneous monitoring of curvature and temperature during post-deposition cooling, Young’s moduli of the coatings were determined. Second, a 5-layer stepwise functionally graded material (FGM) was sprayed. With the knowledge of each layer’s properties, the complex evolution of deposition, thermal and residual stresses in the FGM could be determined. The ability to determine the stresses and mechanical properties with a spatial resolution comparable to the thickness of one spray pass is demonstrated.
Permanent Link: http://hdl.handle.net/11104/0233425