| abstract |
The invention discloses a Si-containing high-strength and low-modulus medical titanium alloy and an additive manufacturing method and application thereof; the preparation method includes alloy composition design, powder milling, model building, substrate preheating and additive manufacturing forming; wherein the Si-containing The composition of high strength and low modulus medical titanium alloy is Ti 60～70at.%, Nb 16～24at.%, Zr 4～14at.%, Ta 1～8at.%, Si 0.1～5at.%; The electronic theory designs a medical β-type titanium alloy with high strength, low modulus and good biocompatibility. The thermal expansion difference between the silicide and the β-Ti phase is reduced by preheating, and at the same time, it is ensured that sufficient The degree of cooling promotes the transformation of the alloy from the dissociated eutectic to the desolubilization reaction, and solves the common problems such as the continuous distribution of the Si-containing phase along the grain boundary, the deterioration of the mechanical properties, and the easy cracking caused by the difference in the thermal expansion coefficient of the different phases. |