Microstructure characterization and corrosion performance of Alloy 625 weld cladding deposited using TWF-GTAW and PTA-P

This paper compares the microstructure and corrosion performance of Alloy 625 weld cladding deposited using Top Wire Feeding GTAW (TWF-GTAW) and Plasma Transferred Arc with Powder (PTA-P). The analysis indicated higher dilution values for TWF-GTAW, with 27.5% for a single layer, whereas in PTA-P, th...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2024-12, Vol.135 (7-8), p.3511-3528
Main Authors: Haupt, William, Riffel, Kaue C., Dall’Oglio, Alexandre Pereira, Schwedersky, Mateus Barancelli
Format: Article
Language:English
Subjects:
Arc deposition
CAE) and Design
Computer-Aided Engineering (CAD
Corrosion
Corrosion resistance
Corrosion resistant alloys
Dilution
Engineering
Gas tungsten arc welding
Industrial and Production Engineering
Iron
Laves phase
Mechanical Engineering
Media Management
Microstructure
Monolayers
Nickel base alloys
Original Article
Superalloys
Weld cladding
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Summary:This paper compares the microstructure and corrosion performance of Alloy 625 weld cladding deposited using Top Wire Feeding GTAW (TWF-GTAW) and Plasma Transferred Arc with Powder (PTA-P). The analysis indicated higher dilution values for TWF-GTAW, with 27.5% for a single layer, whereas in PTA-P, the dilution was 5.1% for a single layer. Both single and double layers presented similar dilution for the different welding conditions because the second deposited layer only partially melted the first layer. The Fe content was higher in TWF-GTAW compared with PTA-P welding. Micrographic characterization showed the formation of micropores in welding using the PTA-P process, with a predominance of Laves phase formation as an interdendritic precipitate. In contrast, TWF-GTAW welding showed the formation of Laves phases and carbide without the presence of micropores. Corrosion resistance was superior for TWF-GTAW weld cladding, with slightly better performance observed for the double layer. In the PTA-P process, interdendritic corrosion was observed, which can be associated with the presence of micropores.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-024-14733-y