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2074 |
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Wednesday, May 05, 2010, Moor Room 1:40 PM Properties 3 |
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Influence of residual stresses on cracking behavior of composite WC-17Co coating in scratch test |
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Arash Ghabchi* / Technical Research Center of Finland(VTT), Finland Kenneth Holmberg/ Technical Research Center of Finland (VTT), finland Alfredo Valarezo/ Center for Thermal spray research, Material science and engineering department, SUNY Stony Brook, USA Erja Turunen/ Technical Research Center of Finland (VTT), finland Sanjay Sampath/ Center for Thermal spray research, Material science and engineering department, SUNY Stony Brook, USA |
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WC-17Co coatings were deposited on stainless steel and aluminum substrates with tension and compression residual stress states, respectively. Residual stresses were evaluated by the in- situ coating property evaluation sensor which is based on curvature measurement monitoring of the sprayed sample during the deposition stage. Scratch tests were carried out as done on the coatings to study the effect of residual stress on cracking behavior at increasing load conditions. Different failure mechanisms were addressed by studying top surface and cross section of the scratch track prepared by focused ion beam technique. |