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The surface of Ni61 Nb39 crystalline ingot was treated by laser surface melting with different processing parameters. A fully amorphous layer with a thickness of approximately 10 μm could be produced on the top surface under optimal parameters. An amorphous-crystalline composite layer with the depth from 10 to 50 μm, consisting of amorphous matrix and intermetallic phases of Ni3 Nb and Ni6Nb7, could...
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