Publicação
The influence of heat treatment on precipitate formation in Scalmalloy®
| Resumo: | Additive manufacturing offers a novel approach to producing lightweight components with complex geometries. Aluminum alloys, renowned for their low density and high mechanical properties, have emerged as prime candidates for this technology. Aluminum alloys, processed using laser-based powder bed fusion (PBF-LB), have gained significant interest in aerospace, construction, and automotive applications due to their lightweight properties, corrosion resistance, and fine-grained microstructure. Given its recent attention, PBF-LB Scalmalloy® samples were subjected to in-situ coupled experiments with heat treatments in a high-energy X-ray diffraction (HEXRD) beamline to collect diffractograms in transmission mode. Subsequently, transmission electron microscopy (TEM) was used to analyze the microstructure deeply and pursue the characterization of the formed precipitates. Results showed finely dispersed precipitates formed, which evolved slowly in lower heat-treatment temperatures, under 325 °C. In contrast, a higher temperature of 400 °C led to coarsening and hardness loss for long treatment periods. |
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| Autores principais: | Conde, Fábio Faria |
| Outros Autores: | Gabriel, André H. G.; Schell, N.; Oliveira, J. P.; Avila, Julian A.; Fonseca, Eduardo B. da; Lopes, Éder S. N. |
| Assunto: | Al alloy Al-Sc AlSc AlMn In-situ XRD PBF-LB Precipitation General Materials Science Condensed Matter Physics Mechanics of Materials Mechanical Engineering |
| Ano: | 2026 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | Additive manufacturing offers a novel approach to producing lightweight components with complex geometries. Aluminum alloys, renowned for their low density and high mechanical properties, have emerged as prime candidates for this technology. Aluminum alloys, processed using laser-based powder bed fusion (PBF-LB), have gained significant interest in aerospace, construction, and automotive applications due to their lightweight properties, corrosion resistance, and fine-grained microstructure. Given its recent attention, PBF-LB Scalmalloy® samples were subjected to in-situ coupled experiments with heat treatments in a high-energy X-ray diffraction (HEXRD) beamline to collect diffractograms in transmission mode. Subsequently, transmission electron microscopy (TEM) was used to analyze the microstructure deeply and pursue the characterization of the formed precipitates. Results showed finely dispersed precipitates formed, which evolved slowly in lower heat-treatment temperatures, under 325 °C. In contrast, a higher temperature of 400 °C led to coarsening and hardness loss for long treatment periods. |
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