Abstract
In the present study, the interface fracture toughness and adhesioln strength between a Ti coating film and Al-alloy substrate was evaluated using a laser spallation method. The fracture toughness and adhesion strength can be estimated using inverse analyses by the boundary element method using a transfer function computed from the history of the displacement of the specimen. In the present study, an alternative boundary element program is developed for unsteady state vibration of an axisymmetric solid body. The mode I interface fracture toughness between the Ti coating film and Al-alloy substrate is confirmed to be about 0.66 MPam^<1/2> from the present investigation.
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