Laser cladding of eutectic-based Ti–Ni–Al alloy coating on magnesium surface

A Ti70.3Ni22.2Al7.5 alloy, optimized from a basic binary eutectic Ti76Ni24 alloyed with different amounts of Al, was laser-clad on AZ91HP magnesium alloy. The coating mainly consists of β-Ti solid solution and Ti2Ni intermetallic compound resulting in high hardness, good wear resistance and corrosion resistance. The interface between the clad layer and the substrate has a good metallurgical bonding.