Tensile mechanical behavior of Cu/Ni bilayer electrodeposited Ni 54 Nb 42 Al 4 metallic glass Fibers

In the current work, the tensile mechanical behavior of Cu/Ni bilayer electrodeposited Ni ₅₂ Nb ₄₂ Al ₄ metallic glass (MG) fibers with a presizely controle different volume fractions (R) of bilayer coating i.e. , R = 0% to R = 95% is investigated by using electrochemical deposition technique. Experimental results reveal that yield stress, tensile stress and fracture stress is decreased with the increasing volume fractions (R) of bilayered Cu/Ni-coating. However the plastic strain is significantly increased with the increasing R values (R = 65% and above). The coating thickness and good interface bonding between two layers (Cu & Ni), as well as with the surface of MG fibers is responsible for larger enhancement in tensile plasticity of bilayered coated Ni ₋ Nb-Al MG fibers. The plastic deformation of Cu/Ni bilayer electrodeposited MG fiber with a coating volume fraction, R = 95% is 5.8%. Electrochemical deposition of Cu/Ni bilayer onto Ni ₅₂ Nb ₄₂ Al ₄ fibers can play a significant role in engineering applications.