Abstract
Experimental observations have been made concerning the decohesion of Cr films from glass substrates. The observations reveal that the films first split, the cracks then extend into the substrate and eventually acquire a steady-state trajectory parallel to the interface. A comparison of fracture mesurements with mechanics solutions for substrate cracks affirms a prior postulate that steady-state cracks grow along the plane for which K II = 0. Evaluations of K I , on that plane, deduced from measurements of crack velocities (in a controlled humidity environment) are also in good agreement with predicted values.
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