Abstract:To observe the failure process of coating/substrate materials, a gradually changed curvature bending (GCCB) method is proposed, and the relevant equipment is developed. Before GCCB experiment, Ni-coated Ti6Al4V (TC4) samples were prepared. The effect of vacuum heat treatment on the microstructure at Ti/Ni interface is discussed. With the increase in heat treatment time, intermetallic compounds of TiNi 3 , TiNi, and Ti 2 Ni start to form. Kirkendall void forms in Ni coating at first, and then the pore number de… Show more
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