Annealing effect on thermal, mechanical and magnetic properties of Fe-Ni-Co alloys

Autor(es)

Paganotti, Andre ^[1] ; Bessa, C. V. X. ^[1] ; Ferreira, L. D. R. ^[1] ; Gama, S. ^[1] ; Silva, R. A. G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Lab Mat & Mech Manufacture, Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 811, NOV 30 2019.
• Citações Web of Science: 0

Resumo

In this study the thermal, mechanical and magnetic properties of the Fe-24.5%at.Ni-10%at.Co, Fe-22.5% at.Ni-10%at.Co, Fe-22.5%at.Ni-12%at.Co, Fe-26.5%at.Ni-10%at.Co and Fe-26.5%at.Ni-8%at.Co alloys initially annealed were studied by different experimental techniques for understanding the predicted first-order magnetic transition occurring at about 473 K in the Fe-24.5%at.Ni-10%at.Co alloy. The results showed that the annealing heat treatment does not significantly change the properties of the studied Fe-Ni-Co alloys. The alloys presented a first-order magnetic transition from a high magnetization saturation state to a near zero magnetization at about 1000 K during heating and about 500 K during cooling. This high thermal hysteresis was associated with the presence of a precipitation reaction. This material also presented good mechanical properties. The results also showed that suppressing the Fe3Ni precipitation reaction in these alloys may enable the material to show magnetic properties adequate for its application in thermomagnetic motors. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 19/06717-0 - Estudo da estabilidade de fases em ligas multicomponentes
• Beneficiário: Ricardo Alexandre Galdino da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/08583-3 - Estudo de ligas e nanoligas do sistema Fe-Ni-Co para aplicação em motores termomagnéticos
• Beneficiário: André Paganotti
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto