Oligocrystalline microstructure in an additively manufactured biocompatible Ti-Nb-Zr-Ta alloy

Author(s)

Batalha, Rodolfo Lisboa ^{[1, 2]} ; Pauly, Simon ^{[1, 3]} ; Kuhn, Uta ^[1] ; Kosiba, Konrad ^[1] ; Bolfarini, C. ^{[2, 4]} ; Kiminami, Claudio Shyinti ^{[2, 4]} ; Gargarella, Piter ^{[2, 4]}

Affiliation

^[1] Leibniz Inst Solid State & Mat Res, Inst Complex Mat, Dresden - Germany

^[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Sao Carlos - Brazil

^[3] Univ Appl Sci Aschaffenburg, Fac Engn, Aschaffenburg - Germany

^[4] Univ Fed Sao Carlos, Dept Mat Engn, Sao Carlos - Brazil

• Document type: Journal article
• Source: Materials Letters; v. 262, MAR 1 2020.
• Web of Science Citations: 0

Abstract

Oligocrystalline materials exhibit large grains typically spanning the entire sample in one dimension, which strongly reduces the area covered by grain boundaries. This microstructure increases the pseudoelasticity, fatigue lifetime and ductility of shape memory alloys. In this paper, we demonstrate a new processing route for obtaining parts with complex geometries and oligocrystalline microstructure in biocompatible Ti-35Nb-7Zr-5Ta alloy by combining additive manufacturing and heat treatment. Oligocrystallinity has a pronounced effect on the recoverable strain during uniaxial compression. This processing route is applicable to different types of alloys and allows the production of oligocrystalline parts with complex shapes and advanced functional properties. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 17/27031-4 - Effect of process parameters on the metallurgical characteristics of additive-manufactured alloys
• Grantee: Piter Gargarella
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
• Grantee: Claudio Shyinti Kiminami
• Support Opportunities: Research Projects - Thematic Grants