No abstract

The Ti–35Nb–7Zr–5Ta (wt%, TNZT) alloy was reinforced with TiB2 and synthesized by L-PBF. The relatively small TiB2 particles change the solidification structure from cellular to columnar-dendritic and lead to submicron TiB precipitation in the β matrix. This results in pronounced grain refinement and reduction of texture. However, the microstructure of the additively manufactured TNZT-TiB2 is still different from the as-cast, unreinforced TNZT, which contains equiaxed and randomly oriented grains. The β phase is less stable in the as-cast samples, leading to stress-induced martensitic transformation and recoverable strain of 1.5%. The TNZT with 1 wt% of TiB2 presents significantly higher compressive strength (σYS = 495 MPa) compared to unreinforced samples (σYS = 430 MPa), without sacrificing ductility or altering Young’s modulus (E ≈ 46 GPa). The addition of a small fraction of TiB2 to the TNZT alloy synthesized by L-PBF is a promising alternative for manufacturing sophisticated components for biomedical applications. Graphical abstract

No abstract

This article was updated to correct Eric Marchezini Mazzer's name.

Gum Metals are β-Ti alloys that present only non-toxic elements in their composition, low elastic modulus, good formability, and excellent biocompatibility. The composition of these alloys needs to fulfill some electronic criteria to present their typical properties. In addition, during their processing, Gum Metal must be significantly deformed, which can be obtained by cold rolling or swaging. Over the last years, several new processing routes and alloy compositions have been proposed to meet these requirements, expanding the range of properties for Gum Metal, and increasing their extent of application. Although being relatively new, Gum Metal has been extensively studied. However, there is a lack of a review that encompasses the findings obtained over the years, as well as its future perspectives. This review aims to critically discuss and analyze Gum Metal development, with a special focus on new compositions, processing routes, and applications. Moreover, future perspectives are explored as well. Graphical abstract