Publication: High pressure torsion induced lowering of Young's modulus in high strength TNZT alloy for bio-implant applications
Program
KU-Authors
KU Authors
Co-Authors
Maity, T.
Gammer, C.
Ivanov, E.
Eckert, J.
Prashanth, K. G.
Publication Date
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Type
Embargo Status
Journal Title
Journal ISSN
Volume Title
Alternative Title
Abstract
An exceptional combination of low Young's modulus (E similar to 68 GPa) and high flow strength (sigma(f) similar to 1 GPa) was achieved for a consolidated beta-Ti-based metastable Ti-35Nb-7Zr-5Ta (TNZT) alloy subjected to room temperature high-pressure torsion (HPT). The mechanical properties of the alloy were studied by quasistatic nanoindentation tests at different strain rates, where a reduction in Young's modulus E similar to 73 GPa (N-HPT(10)) and E similar to 68 GPa (N-HPT(40)) is observed together with an increase in plastic deformability (or HPT rotations). The microstructure evolution with increasing shear strain has been investigated. The stabilized bcc beta-Ti phase with homogeneous nanostructure distribution was observed leading to a low Young's modulus. Severe straining causes a uniform hardness distribution without any noticeable change in the strength of the material. This study may be useful for developing excellent removable implant materials.
Source
Publisher
Elsevier
Subject
Engineering, biomedical, Materials science, biomaterials
Citation
Has Part
Source
Journal of The Mechanical Behavior of Biomedical Materials
Book Series Title
Edition
DOI
10.1016/j.jmbbm.2020.103839