Microstructure and mechanical behavior of Al92Fe3Cr2X3 (X = Ce, Mn, Ti, and V) alloys processed by centrifugal force casting

Autor(es)

Koga, Guilherme Yuuki ^[1] ; Branquinho e Silva, Ana Martha ^[1] ; Wolf, Witor ^{[1, 2]} ; Kiminami, Claudio Shyinti ^[1] ; Bolfarini, Claudemiro ^[1] ; Botta, Walter Jose ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Sci & Engn, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Minas Gerais, Dept Met & Mat Engn, BR-31270901 Belo Horizonte, MG - Brazil

^[3] Grenoble Alpes Univ, CNRS, LEPMI, F-380000 Grenoble - France

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T; v. 8, n. 2, p. 2092-2097, APR 2019.
• Citações Web of Science: 1

Resumo

Microstructural and mechanical characterization of Al92Fe3Cr2X3 (X = Ce, Mn, Ti, and V) alloys were performed. The alloys were processed by a method that uses centrifugal force to cast the samples into a rotating copper mold. Microstructural characterization was carried out by means of x-ray diffraction, scanning electron microscopy, and differential scanning calorimetry. Compressive tests at room and at 300 degrees C were performed in selected samples to evaluate their mechanical properties. Microstructural characterization showed the formation of quasicrystalline phases as well as other intermetallic phases embedded within an Al-FCC matrix. The Ce-containing alloy exhibited promising results regarding quasicrystalline phase formation and stability as well as with respect to its mechanical properties at high temperatures. The quasicrystalline phase of this alloy appears to be stable up to 545 degrees C when the DSC reveals an exothermic transformation. In addition, the presence of a eutectic structure surrounding the Al-FCC grains enhanced the mechanical strength of this alloy. At 300 degrees C, the Ce-containing alloy showed yield strength and ultimate tensile strength of 180 MPa and 360 MPa, respectively. If compared to a commercial aluminum alloy 2024 at the T6 condition, close to 300 degrees C, the alloy studied here showed an increase of more than 4 times in the yield strength, and almost 7 times in the ultimate tensile strength. The high thermal stability and mechanical properties at high temperatures of this alloy open interesting possibilities for further studies and future applications of this Al-Fe-Cr-Ce alloy. (C) 2019 Published by Elsevier Editora Ltda. on behalf of Brazilian Metallurgical, Materials and Mining Association. (AU)

• Processo FAPESP: 17/09237-4 - Design e produção de aços inoxidáveis modificados com boro conformados por spray de elevada resistência a corrosão e ao desgaste
• Beneficiário: Guilherme Yuuki Koga
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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