Caracterización mecánica de aleaciones de Ti-Nb, Ti-Ni y Al-Mg mediante Correlación Digital de Imágenes para la optimización de dispositivos médicos

The present research project is aimed at the development of a device made at the
Costa Rica Institute of Technology for the application of correlation techniques known
as Digital Image Correlation (DIC) to metallic alloys subjected to loads during tensile
tests, with the objective of determining the mechanical behavior of these materials. The
main feature of this home-developed equipment is that it will have a significantly lower
cost than commercially available equipment. In particular, the study will focus on Ti-Nb,
Ti-Ni, and Al-Mg alloys, which have great potential due to their unique mechanical
properties, such as high strength and low weight, shape memory, superelasticity,
superplasticity, and high corrosion resistance.
DIC allows for the precise measurement of displacements and deformations on the
surface of materials under load, providing a quantitative analysis of behavior during
tensile testing. Specifically, the accurate measurement of elongation at failure is
challenging because it is traditionally difficult to disregard the elasticity of the
mechanical elements of the equipment when measuring the deformation of the sample.
Through this technique, it is possible to precisely determine deformation, thereby
enabling the evaluation of key properties of alloys such as Young's modulus (elasticity),
superelastic recovery, shape memory, and superplastic elongation. Additionally, it
allows for the identification of deformation patterns, fracture modes, and heterogeneities
during the testing of the studied alloys.
The aim of the project is to develop a DIC system, to study alloys that require
establishment of microstructure-property relationships which could contribute to the
development of advanced and optimized materials for applications in the aerospace,
biomedical, and automotive industries. The study will also assess the effectiveness of
DIC as a characterization tool compared to traditional techniques, highlighting its
advantages and limitations.

Desarrollo de un equipo de correlación digital de imágenes (DIC) como técnica de caracterización para obtener curvas de tracción en aleaciones de Ti-xNb, Al-Mg y Ti-Ni, para la optimización de dispositivos médicos

1. Mecánica de Materiales
2. Caracterización de Materiales y Ensayos no Destructivos (END)
3. Tecnologías Avanzadas para el Desarrollo y Aplicación de Materiales.