SIMT mechanism and crack behavior in Ti-5553 alloy and Modified Ti-5553 alloy with B4C addition manufactured via Laser Powder Bed Fusion.

• Grant number: 25/02884-0
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Start date: August 01, 2025
• End date: January 31, 2026
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Rubens Caram Junior
• Grantee: Carlos Samuel Alves da Silva
• Supervisor: Milos Janecek
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Charles University in Prague (CU), Czech Republic
• Associated to the scholarship: 23/17771-1 - EXPLORING CRYSTALLOGRAPHIC TEXTURE IN METASTABLE BETA TYPE Ti ALLOYS, BP.MS

Abstract

The metastable beta Ti-5Al-5Mo-5V-3Cr-0.5Fe (wt.%) alloy, commonly known as Ti5553, is an interesting commercial material widely used in the aeronautical and aerospace industries as a structural component, thanks to its high specific strength, excellent corrosion resistance and relatively low specific weight. Notably, the TWIP and TRIP effects in this alloy can be activated at room temperature under stress loading. The residual stress, plastic strain, and defects (e.g., discontinuities) in this alloy, resulting from the Laser Powder Bed Fusion process, have the potential to influence the stressinduced martensitic transformation (SIMT) mechanism and, consequently, affect failure propagation. The aim of this study is to stablish a correlation between residual stress and stress-induced martensitic transformation (SIMT) mechanism, with a view to investigating their impact on the crack behaviour in the Ti 5553 and Ti-5553/B4C samples.