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2021 | OriginalPaper | Buchkapitel

Equal-Channel-Angular-Swaging for the Production of Medical Implants Made of Fine-Grained Titanium

verfasst von : L. Kluy, F. Chi, P. Groche

Erschienen in: Production at the leading edge of technology

Verlag: Springer Berlin Heidelberg

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Abstract

Demands of the aging society shift the focus of production engineering towards challenges in medical technology. An increasing number of people are equipped with implants, but incompatibilities can lead to implant loosening. These incompatibilities can be avoided by implants based on fine-grained titanium which stimulate interactions between implant and bone tissue and thus activate bone healing.
The continuous production process Equal-Channel-Angular-Swaging (ECAS) is applied to achieve grain refinement in titanium rods. Shear strains during forming are therefore numerically investigated. Processing of titanium with conventional ECAS leads to unfilled die cavity. Thus undesired bending occurs, both in simulation and experiment. The bending stresses result in material failure. Additionally, the achieved shear strains are inhomogeneously distributed in the cross-section.
It is shown that a hydrostatic stress state created by counter pressure improves the failure limit, yields in more homogenous shear strain distributions and enables a continuous production of fine-grained titanium.

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Metadaten
Titel
Equal-Channel-Angular-Swaging for the Production of Medical Implants Made of Fine-Grained Titanium
verfasst von
L. Kluy
F. Chi
P. Groche
Copyright-Jahr
2021
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-662-62138-7_6

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