Achieving low elastic modulus, excellent work hardening and high corrosion resistance in Ti-6Al-4V-5.6Cu alloy

Biomedical Ti-6Al-4 V-5.6Cu alloys with low elastic modulus, excellent work hardening and outstanding corrosion resistance were achieved by manipulating the fractions of martensite phases made up of alpha '' and alpha '. The main cause of the low modulus, great work hardening and high elongation is due to the presence of alpha '' phase. The martensite reorientation induced plasticity (MRIP) phenomenon, which was infrequently re-corded in (alpha + beta)-type Ti alloys, was produced when the alpha '' converted into twined alpha ' and caused the reorientation of the remainder alpha '. The sample solid solution treated at 800 degrees C exhibited greater corrosion resistance than all other tested alloys due to the dissolution of Ti2Cu phases and the comparable proportion of martensite to primary alpha (martensite/primary alpha area ratio is approximately 0.69). The optimized Ti-6Al-4 V-5.6Cu alloy exhibited strong potential for development as a biomedical implant material due to its combination of low elastic modulus (55 GPa), high YS/E ratio (10.25), excellent work hardening perfor-mance (Delta sigma = 848 MPa), and superior corrosion resistance.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

Biomedical Ti-6Al-4 V-5.6Cu alloys with low elastic modulus, excellent work hardening, and outstanding corrosion resistance were achieved by manipulating the fractions of martensite phases made up of alpha '' and alpha '. The presence of alpha '' phase caused the low modulus, great work hardening, and high elongation. The optimized Ti-6Al-4 V-5.6Cu alloy exhibited strong potential for development as a biomedical implant material due to its combination of low elastic modulus (55 GPa), high YS/E ratio (10.25), excellent work hardening performance (Delta sigma = 848 MPa), and superior corrosion resistance.