Consumable selection for arc welding between Stainless Steel 410 and Inconel 718

Dissimilar welding was achieved between martensitic stainless steel type AISI 410 and Inconel 718 using Cold Wire Gas Tungsten Arc Welding (CW-GTAW). Two types of consumables namely 718-410 and 82-410 were selected for this study. In both weldments, the microstructure investigation showed fully aust...

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Bibliographic Details
Published in:Journal of materials processing technology 2017-07, Vol.245, p.287-299
Main Authors: Hejripour, Fatemeh, Aidun, Daryush K.
Format: Article
Language:English
Subjects:
Base metal
Cold welding
Deformation resistance
Dissimilar material joining
Dissimilar welds
Gas tungsten arc welding
Hardness
Heat affected zone
Inconel 718
Indentation
Martensitic stainless steel
Martensitic stainless steels
Mechanical properties
Microstructure
Nano-indentation
Nickel base alloys
Phases
Plastic deformation
Secondary phases
Stainless steel 410
Superalloys
Tensile strength
Welding
Weldments
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Summary:Dissimilar welding was achieved between martensitic stainless steel type AISI 410 and Inconel 718 using Cold Wire Gas Tungsten Arc Welding (CW-GTAW). Two types of consumables namely 718-410 and 82-410 were selected for this study. In both weldments, the microstructure investigation showed fully austenitic weldments with formation of secondary phases. Secondary phases were present in the heat affected zone (HAZ) of 718, and an unmixed melted zone (UMMZ) was observed on the 410 interface. The hardness of the secondary phases and UMMZ were determined using nano-indentation, and results revealed higher hardness in these regions compared to the weld zone (WZ) matrix. The UMMZ was removed by arc current enhancement. Mechanical examinations indicated that secondary phases and UMMZ did not significantly affect tensile strength and resistance to plastic deformation. However, investigation revealed that secondary phases can have a detrimental effect on ductility. Filler wire 82-410 demonstrated improved mechanical properties compared to filler 718-410 at room temperature and resulted in a stronger weld compared to 410 base metal (BM).
ISSN:0924-0136
1873-4774
DOI:10.1016/j.jmatprotec.2017.02.013