Microstructure, phase formation and properties of rapid solidified Al-Fe-Cr-Ti alloys

Author(s)

de Araujo, Aylanna P. M. ^{[1, 2]} ; Micheloti, Leandro ^[1] ; Kiminami, Claudio S. ^{[1, 2]} ; Gargarella, Piter ^{[1, 2]}

Affiliation

^[1] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, Sao Carlos - Brazil

^[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rd Washington Luis Km 235, BR-13565905 Sao Carlos - Brazil

• Document type: Journal article
• Source: MATERIALS SCIENCE AND TECHNOLOGY; v. 36, n. 11, p. 1205-1214, JUL 23 2020.
• Web of Science Citations: 2

Abstract

Improvements in the mechanical strength of Al-Fe-Cr-Ti alloys have been demonstrated when non-equilibrium microstructures are developed. This paper investigated the effect of cooling rate and composition on the phase formation, microstructure and properties of new Al96.6Fe1.5Cr1.7Ti0.2 and Al91.6Fe4.9Cr2.2Ti1.3 (at.-%) alloys. Wedge-shaped samples produced by suction casting were characterised by optical, scanning electron microscopy, differential scanning calorimetry, X-ray diffraction, energy dispersive X-ray spectroscopy and microhardness. The results showed that the morphology and size of the phases precedent of the flower-like phases change from small, spherical particles to large flower-like phases with decreasing the cooling rate. The presence of intermetallic phases Al13Fe4, Al13Cr2 and Al3Ti in the Al91.6Fe4.9Cr2.2Ti1.3 alloy, resulted in a hardness 1.6 times higher compared to the Al96.6Fe1.5Cr1.7Ti0.2 alloy. (AU)

• 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