Abstract No.:	2093
Scheduled at:	Wednesday, May 05, 2010, Olivia Room 12:00 PM Properties 2
Title:	Arc spraying of WC-FeCrSiC cored wires part 1: bending, compression and tension behavior
Authors:	Jan Nebel* / Institute of Materials Engineering, Germany Evelina Vogli/ Institute of Materials Engineering, Germany Wolfgang Tillmann/ Institute of Materials Engineering, Germany
Abstract:	This is the first in a series of two papers concerning the intrinsic mechanical properties of Arc-sprayed WC-FeCrSiC coatings. In part 1 the elastic and plastic forming behavior of the layers are investigated by hardness indention tests, 3-point bending tests and tensile tests. They were performed on coated mild steel substrates as well as free standing as-sprayed samples with different geometries. Considering the coatings microstructure, element and pore distribution, as well as the local microhardness the results of the indention, bending, and tensile tests are evaluated. The critical role of pores and inhomogenities within the sprayed coating was examined in detail. Micro- and macrocracking of the coating is investigated by SEM after the indention and tensile tests. In-situ surface observation by optical 3D microscopy was used to study the onset of cracking during the 3-point bending test.

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