On the microstructure characterization of the AA2098-T351 alloy welded by FSW

Autor(es)

Milagre, Mariana X. ^[1] ; Mogili, Naga V. ^[2] ; Donatus, Uyime ^[1] ; Giorjao, Rafael A. R. ^[2] ; Terada, Maysa ^[2] ; Araujo, Joao Victor S. ^[1] ; Machado, Caruline S. C. ^[1] ; Costa, Isolda ^[1]

Afiliação do(s) autor(es)

^[1] CNEN, IPEN, Av Prof Lineu Prestes, BR-2242 Sao Paulo - Brazil

^[2] CNPEM, Lab Nacl Nanotecnol LNNANO, BR-10000 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS CHARACTERIZATION; v. 140, p. 233-246, JUN 2018.
• Citações Web of Science: 10

Resumo

The complex structure of the AA2098-T351 alloy welded by friction stir welding (FSW) was investigated by transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and microhardness measurements. Thermal modelling process of the FSW process was carried out by soldering thermocouples at distances of 6, 9 and 12 mm from the weld centerline, and thermocouple measurements were used as input data into the model. Finite element software COMSOL v5.2 was used for data analysis. The prevailing phases in the base metal (BM) are T1 (Al2CuLi) theta' (Al2Cu), delta'/beta'(Al-3(Li,Zr)) and Omega (Al2Cu). In the heat affected zone (HAZ), either in the retreating or advancing sides, theta' phase was not identified. In the thermomechanical affected zone (TMAZ), T1, delta'/beta', GP zones phase were detected in the retreating side, whereas T1 and Guinier-Preston (GP) zones were not observed in the advancing side. This result supports the asymmetric behavior observed in the microhardness profile of the weld. In the stir zone (SZ), GP zones, T1, delta'/beta' (Al-3(Li,Zr)) and Omega were identified. (AU)

• Processo FAPESP: 13/13235-6 - Estudo da corrosão localizada e caracterização da resistência à corrosão associada à fadiga na região de solda em ligas de alumínio de elevada resistência soldadas por fricção (FSW)
• Beneficiário: Isolda Costa
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/03095-3 - Investigação da suscetibilidade à corrosão de ligas Al-Cu-Li com solda por atrito (FSW) utilizando a técnica de varredura do eletrodo vibratório (SVET)
• Beneficiário: Uyime Donatus
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado