Microstructure and mechanical behavior of Ti-Cu alloys produced by semisolid processing

Autor(es)

Niitsu Campo, Kaio ; de Freitas, Caio Chausse ; Lopes, Eder Socrates Najar ; Moon, Suk-Chun ; Dippenaar, Rian ; Caram, Rubens

• Tipo de documento: Artigo Científico
• Fonte: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA; v. 32, n. 11, p. 9-pg., 2022-11-01.

Resumo

The mechanical properties of Ti-Cu alloys processed via thixoforming were evaluated. Ti-Cu (25, 27, and 29 wt.% Cu) ingots were produced via arc melting, homogenization at 950 degrees C for 24 h, and hot-forging at 900 degrees C, followed by thixoforming at a speed of 8 mm/s after isothermal heat treatment at 1035 degrees C for 300 s. The thixoformed alloys exhibited good mechanical strength, limited plasticity under tensile loading, and reasonable plasticity under compressive loading. The mechanical strength and plasticity decreased as the Cu content increased as a result of the increasing volume fraction of the peritectic Ti2Cu phase (transformed liquid), which exhibited a lower strength and plasticity than the alpha + Ti2Cu regions (transformed solid). These findings indicated that the trade-off between the mechanical properties and semisolid processability is largely governed by the Cu content. (AU)

• Processo FAPESP: 17/07040-9 - Observação in situ de ligas de Ti no estado semissólido via microscopia confocal de varredura a laser
• Beneficiário: Kaio Niitsu Campo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 13/24786-3 - Tixoconformação de ligas de titânio: aplicação aos sistemas Ti-Cu, Ti-Fe e Ti-Co
• Beneficiário: Kaio Niitsu Campo
• Modalidade de apoio: Bolsas no Brasil - Doutorado