Investigating multi-material Ti-42Nb lattice structures fabricated via laser powder bed fusion using a genetic algorithm to optimize Ti-5553 reinforcement band position

Autor(es)

Valentim, Matheus ; Rodrigues, Joao Felipe Queiroz ; Prandi, Gilberto Vicente ; Sangali, Marcio ; da Silva, Leandro Santos ; Soyama, Juliano ; Caram, Rubens

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 925, p. 17-pg., 2025-01-19.

Resumo

Laser Powder Bed Fusion (LPBF) technologies enable the production of cellular lattice structures (CLSs), known for their promising applications in stress-bearing environments due to their superior performance under load conditions with minimal mass. This study explores the enhancement of multi-material lattice structures via additive manufacturing, leveraging Ti-42Nb and Ti-5553 alloys to refine mechanical properties through optimized reinforcement layering. Adopting a dual-alloy strategy, it assesses the interplay between Ti-42Nb and the structurally superior Ti-5553, aiming to boost the mechanical performance of the components. Optimization of reinforcement placement was achieved using a genetic algorithm coupled with Finite Element Method and reinforcement band thickness was adjusted to maintain integrity post-melt pool processing. A heat treatment at 500 degrees C was identified as critical for increasing hardness and elastic modulus in the reinforcement phase. Compression testing demonstrated the effectiveness of this reinforcement strategy, showing improvements up to 50 % in load-bearing capacity and mechanical tenacity with the addition of a reinforcement band notably altering deformation mechanisms of multi-material structure. These findings affirm that lattice structures and multi-material parts manufactured through additive processes offer promising prospects for applications in industries requiring advanced material performance. (AU)

• Processo FAPESP: 18/18293-8 - Ligas de titânio: transformações de fases e manufatura aditiva aplicadas na obtenção de materiais com gradientes funcionais
• Beneficiário: Rubens Caram Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 22/10350-8 - Modulação de propriedades mecânicas de componentes para implante via manufatura aditiva de ligas de Ti
• Beneficiário: Matheus Valentim
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto