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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 8
Affiliation:
[1] CNEN, IPEN, Av Prof Lineu Prestes, BR-2242 Sao Paulo - Brazil
[2] CNPEM, Lab Nacl Nanotecnol LNNANO, BR-10000 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: MATERIALS CHARACTERIZATION; v. 140, p. 233-246, JUN 2018.
Web of Science Citations: 10
Abstract

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)

FAPESP's process: 13/13235-6 - Investigation on the localized corrosion and the fatigue corrosion resistance of high strength aluminum alloys joined by friction stir welding (FSW)
Grantee:Isolda Costa
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/03095-3 - Investigation on corrosion susceptibility of Al-Cu-Li alloys by friction stir welding (FSW) through scanning vibrating electrode technique (SVET)
Grantee:Uyime Donatus
Support Opportunities: Scholarships in Brazil - Post-Doctoral