Characterization of AlCoCrFeNi High Entropy Alloy Gas Atomized Powder

Autor(es)

Bomfim, Pamela Karina dos Santos ^[1] ; Coury, Francisco Gil ^{[1, 2]} ; Wang, Pei ^[3] ; Gargarella, Piter ^{[1, 2, 4]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Programa Pos Grad Ciencia & Engn Mat, Rodovia Washington Luis, Km 235 SP-310, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Engn Mat, Rodovia Washington Luis, Km 235 SP-310, BR-13565905 Sao Carlos, SP - Brazil

^[3] Shenzhen Univ, Coll Mech & Control Engn, Addit Mfg Inst, Shenzhen 518060 - Peoples R China

^[4] Univ Fed Sao Carlos, Ctr Caracterizacao & Desenvolvimento Mat CCDM, Rodovia Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 25, n. 1 2022.
• Citações Web of Science: 0

Resumo

AlCoCrFeNi alloys are widely studied due to the combination of high strength in a wide temperature range, good corrosion and wear resistance, but they typically present low ductility. Due to this limited ductility, traditional bulk fabrication processes that involve forming are difficult, and casting processes are also non-ideal due to pronounced segregation and coarse microstructure. Therefore, both the selective laser melting and the powder metallurgy are more promising routes for this alloy, both of these use powder as starting material. This work aimed to produce powder of Al20Co20Cr20Fe20Ni20 alloy by gas atomization and to perform its detailed characterization.The results show that the powder is mainly spherical, which resulted in good flowability. Most of the powder (62%) has a size smaller than 75 mu m, and microscopy analyses confirmed that a B2 dendritic microstructure was formed, with A2 cuboidal precipitates. (AU)

• 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