Preparation of TiNbTaZrMo high-entropy alloy with tunable Young's modulus by selective laser melting

Biological high-entropy alloy (Bio-HEA) is a new generation of biomedical alloys with excellent mechanical properties and good biocompatibility. However, elemental segregation often exists during conventional casting or arc melting, which dramatically degrades their mechanical performance. Here, we utilized the selective laser melting (SLM) technique to fabricate dense blocks with low Young's modulus and good compression property at room temperature. Then, we fabricated HEA with triply periodic minimal surface (TPMS) lattice, which has Young's modulus (6.71-16.21 GPa) very close to that of human trabecular bone. This structure provides the possibility of meeting the requirement of various bone implants by customizing the shape and porosity of the TPMS lattice, affirming the possibility of Bio-HEA for biomedical applications.

Automated summary

Biological high-entropy alloy (Bio-HEA) is a promising biomedical alloy with excellent mechanical properties and biocompatibility. Selective laser melting (SLM) technique is used to fabricate dense blocks with low Young's modulus and good compression property at room temperature. Triply periodic minimal surface (TPMS) lattice in the HEA structure, with Young's modulus close to that of human trabecular bone, allows for customization of shape and porosity, enabling Bio-HEA to meet various bone implant requirements.