The Effect of Temperatures Developed During Sputter Ion Plating on the Microstructure and Microhardness of AISI 4340 Steel
Ion plating has been briefly investigated as a means of applying highly adherent, wear resistant coatings for potential military applications. One of the additional and major constraints on the coating process was that the application of the coating could in no way degrade the mechanical properties of the substrate. The microhardness data complements the microstructural information with respect to the maximum substrate temperature range possible during ion plating. By controlling the sputter ion plating process, it is possible to obtain excellent adherence between coatings and substrates of AISI 4340 steel. This can be accomplished without the loss in original microstructure or, as was shown, hardness. Coatings which can improve the wear characteristics of materials can be deposited in a controlled manner by sputter ion plating, a process which is amenable to coating large area surfaces or the internal diameter of tubes.
KeywordsBias Sputtering Wear Resistant Coating Steel Coupon Uncoated Specimen Uncoated Steel
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