| Texto completo | |
| Autor(es): |
de Araujo, Aylanna P. M.
;
Kiminami, Claudio S.
;
Uhlenwinkel, Volker
;
Gargarella, Piter
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 886, p. 10-pg., 2023-10-17. |
| Resumo | |
Normalized tensile samples of Al-4Fe-3Cr-2Ti (wt.%) alloy were successfully fabricated by laser powder bed fusion (LPBF) additive manufacturing. The alloy's tensile properties and microstructure were investigated at room and high-temperature (up to 500 degrees C). This Al-Fe-Cr-Ti alloy exhibits exceptional thermal stability and outstanding mechanical performance at temperatures of up to 500 degrees C. A particularly interesting feature is the alloy's yield strength values, which reach -300 MPa at 300 degrees C and -180 MPa at 400 degrees C. The outstanding mechanical behavior of this alloy at high temperatures is attributed to the in situ precipitation of ultrafine icosahedral quasicrystalline (i-QC) particles endowed with high thermal stability. These values are notably higher than those achieved for A319, 6061-T6 and Al-8%wt.Cu-Mg-Ag cast alloys - three of the most common heat-resistant Al alloys, and higher than commercially available Al-based alloys for LPBF. Based on hardness measurements and the bimodal composite microstructure, we propose a model to predict this alloy's yield strength. This model shows a good agreement with the experimental results and can be used to maximize the alloy's tensile strength. This work describes a lightweight aluminum alloy with outstanding high temperature tensile strength within a wide range of temperatures, in addition to being additively processable and affordable. (AU) | |
| Processo FAPESP: | 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas |
| Beneficiário: | Claudio Shyinti Kiminami |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 17/27031-4 - Influência de parâmetros de processo nas características metalúrgicas de peças fabricadas por manufatura aditiva |
| Beneficiário: | Piter Gargarella |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 18/04209-5 - Correlação entre microestrutura e propriedades mecânicas de liga formadora de fase quasicristalina obtida por fusão seletiva a laser |
| Beneficiário: | Aylanna Priscila Marques de Araújo |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |