Publicação
Additive manufacturing Of High Entropy Alloys
| Resumo: | High-entropy alloys (HEAs) have garnered recent attention as a novel class of ad- vanced engineering alloys due to their capacity for compositional control, microstructure ma- nipulation, and tailoring of mechanical properties. Similarly, additive manufacturing (AM) has also witnessed a surge in interest. AM is a process for fabricating physical objects by layer- by-layer assembly from digital designs. This innovative technology has the potential to revo- lutionize the paradigm of product design, fabrication, and distribution by enabling complex geometries, on-demand production, and just-in-time manufacturing. This study presents an analysis of a new alloy (Fe40Mn20Co20Cr15Si5) fabricated using the Laser Powder Bed Fusion (LPBF) method. The primary objective was to investigate the effects that printing parameters may exert on the resulting samples. To achieve this, a compar- ative study was conducted involving two samples with varying parameters (power and scan- ning speed). Two distinct types of analyses were employed for this comparison: microstruc- tural analysis and mechanical property assessment. Microstructural analysis of the samples was carried out using optical microscopy, in- volving various magnifications and pre- and post-treatment processes (etching). However, it was determined that this method was insufficient to fully elucidate the microstructure. Furthermore, mechanical property analysis consisted of two distinct studies involving hardness tests and compression tests on the samples. These tests revealed notable differences in material behaviour with respect to the employed printing parameters. |
|---|---|
| Autores principais: | Marco, João Augusto Oliveira de |
| Assunto: | High Entropy Alloys Additive Manufacturing Printing Parameters laser Powder Bed Fusion Mechanical Properties Microstructure |
| Ano: | 2023 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | High-entropy alloys (HEAs) have garnered recent attention as a novel class of ad- vanced engineering alloys due to their capacity for compositional control, microstructure ma- nipulation, and tailoring of mechanical properties. Similarly, additive manufacturing (AM) has also witnessed a surge in interest. AM is a process for fabricating physical objects by layer- by-layer assembly from digital designs. This innovative technology has the potential to revo- lutionize the paradigm of product design, fabrication, and distribution by enabling complex geometries, on-demand production, and just-in-time manufacturing. This study presents an analysis of a new alloy (Fe40Mn20Co20Cr15Si5) fabricated using the Laser Powder Bed Fusion (LPBF) method. The primary objective was to investigate the effects that printing parameters may exert on the resulting samples. To achieve this, a compar- ative study was conducted involving two samples with varying parameters (power and scan- ning speed). Two distinct types of analyses were employed for this comparison: microstruc- tural analysis and mechanical property assessment. Microstructural analysis of the samples was carried out using optical microscopy, in- volving various magnifications and pre- and post-treatment processes (etching). However, it was determined that this method was insufficient to fully elucidate the microstructure. Furthermore, mechanical property analysis consisted of two distinct studies involving hardness tests and compression tests on the samples. These tests revealed notable differences in material behaviour with respect to the employed printing parameters. |
|---|