Investigation on the Electrochemical Performance of Titanium Alloys with Controlled Stiffness Manufactured Via Laser Powder Bed Fusion

• Grant number: 24/10230-8
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• Start date: September 16, 2024
• End date: February 12, 2025
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Rubens Caram Junior
• Grantee: Gilberto Vicente Prandi
• Supervisor: Roche Virginie
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Université Grenoble Alpes (UGA), France
• Associated to the scholarship: 22/10049-6 - Obtaining materials with controlled stiffness by additive manufacturing and heat treatments, BP.DD

Abstract

Titanium and its alloys offer a wide range of mechanical properties due to their physical metallurgy, allowing the obtaining of stiffness gradients through heat treatments in parts with or without compositional gradients. The Ti-42Nb alloy, belonging to the metastable ² alloys, is less susceptible to heat treatments, presenting a ductile microstructure with low mechanical strength and low modulus of elasticity. On the other hand, the Ti-5553 alloy, also metastable, is more sensitive to heat treatments, resulting in high tensile strength after aging at moderate temperatures. The selective laser melting technique (PBF-LB) enables the combination of powders from the two alloys, creating microregions with different compositions and mechanical properties. The combination of two distinct titanium alloys leads to variable stiffness, and this approach has been explored to develop materials with improved properties. This study aims to investigate the electrochemical performance of samples obtained from the combination of these metal powders and to analyze samples subjected to heat treatments. The electrochemical analysis will also be performed on samples with stiffness gradients, varying the composition along the length of the parts.