Study of interactive stresses in thin WC-Co coating of thick mild steel substrate using high-precision neutron diffraction
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Date
2012-11-21
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Trans Tech Publications Ltd
Abstract
Investigations of interaction residual stresses between thin WC-Co surface coated layers on thick mild steel substrates have successfully been performed with neutron diffraction. This systematic approach was conducted on the reference grit-blasted substrates and their HVOF coated WC-Co products. Using a sub-millimeter gauge volume, precisely positioned, the stress gradient through the coated and non-coated substrates were determined and used to derive the coating stress condition prevailing in the thin coating by applying the stress balance (Stoney) approach. In addition, the average stress in each 200 μm thick coating was measured directly with very good agreement obtained between the calculated and measured stress values. Investigations were extended to determine the thermal nature of the residual stresses by studying the annealed counterpart samples as well to follow the evolution of the residual stress upon annealing. © 2014, Trans Tech Publications.
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Keywords
Residual stresses, Neutron diffraction, Annealing, Steels, Surface coating, Heat treatments, Thermomechanical treatments
Citation
Venter, A. M., Luzin, V., Oladijo, O. P., Cornish, L.A., Sacks, N. (2013). Study of interactive stresses in thin WC-Co coating of thick mild steel substrate using high-precision neutron diffraction. Paper presented at the 6th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation (MECA SENS VI 2011), September 7-9, 2011, Hamburg, Germany. In H. G. Brokmeier, M. Müller, P. K. Pranzas, A. Schreyer and P. Staron (Eds.). In Materials Science Forum, 772, 161-165. doi:10.4028/www.scientific.net/MSF.772.161