Additive manufacturing of a quasicrystal-forming Al95Fe2Cr2Ti1 alloy with remarkable high-temperature strength and ductility

Autor(es)

de Araujo, Aylanna P. M. ^[1] ; Pauly, Simon ^{[2, 3]} ; Batalha, Rodolfo L. ^[1] ; Coury, Francisco G. ^{[1, 4]} ; Kiminami, Claudio S. ^{[1, 4]} ; Uhlenwinkel, Volker ^[5] ; Gargarella, Piter ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Fed Univ S ao Carlos, Grad Program Mat Sci & Engn, Rod Washington Luis Km 235, BR-13565905 Sao Carlos - Brazil

^[2] Univ Appl Sci Aschaffenburg, Fac Engn, Wurzburger Str 45, D-63743 Aschaffenburg - Germany

^[3] Leibniz Inst Solid State & Mat Res, Inst Complex Mat, Helmholtzstr 20, D-01069 Dresden - Germany

^[4] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, Rod Washington Luis Km 235, BR-13565905 Sao Carlos - Brazil

^[5] Leibniz Inst Werkstofforientierte Technol IWT Bre, Badgasteinerstr 3, D-28359 Bremen - Germany

• Tipo de documento: Artigo Científico
• Fonte: ADDITIVE MANUFACTURING; v. 41, MAY 2021.
• Citações Web of Science: 0

Resumo

This work investigated the phase formation, thermal stability, and mechanical behavior of a metastable quasicrystal-forming Al95Fe2Cr2Ti1 alloy prepared by selective laser melting (SLM). The powder of this alloy was obtained by gas atomization using recycled material (Al cans) which brings several economic and social advantages. It showed chemical composition, particle size distribution, flowability, and morphology adequate for the SLM process. Samples were produced by SLM in different build directions (0?, 45?, and 90?) with a high relative density of 99.3?99.8%. SLM processing of quasicrystal-forming Al95Fe2Cr2Ti1 powder led to the formation of a microstructure including the presence of nm-sized quasicrystalline precipitates in a dendritic ?-Al matrix mainly in the center of the molten pool while the heat-affected zones showed coarser but also nanometric quasicrystalline and crystalline phases. Similar phase formation and hardness of 180.33 HV were observed at the top and bottom of the samples, independent of the build direction. Due to the formation of ultrafine precipitates and refined grains the samples exhibited a high compressive strength at room temperature and 400 ?C. The material exhibited a remarkable 140 ? 13 MPa yield strength along with extensive compression ductility at 400 ?C, which is higher than what is observed for AlSi SLMed alloys and conventionally processed hightemperature Al alloys. These results show a new opportunity to fabricate higher-performance high-temperature quasicrystal-forming alloys with freedom of geometry design and lower cost. (AU)

• 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
• Processo FAPESP: 19/03010-3 - Fusão seletiva a laser de ligas a base de alumínio formadoras de fase quasicristalina
• Beneficiário: Aylanna Priscila Marques de Araújo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• 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: 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