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

Author(s)

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]}

Affiliation

^[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

• Document type: Journal article
• Source: ADDITIVE MANUFACTURING; v. 41, MAY 2021.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 18/04209-5 - Correlation between microstructure and mechanical properties of a quasicrystalline phase former alloy obtained by selective laser melting
• Grantee: Aylanna Priscila Marques de Araújo
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 19/03010-3 - Selective laser melting of quasicrystalline phase former al-based alloys
• Grantee: Aylanna Priscila Marques de Araújo
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• FAPESP's process: 17/27031-4 - Effect of process parameters on the metallurgical characteristics of additive-manufactured alloys
• Grantee: Piter Gargarella
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
• Grantee: Claudio Shyinti Kiminami
• Support Opportunities: Research Projects - Thematic Grants