Evaluation of Microstructure, and Mechanical Properties of Superalloy 59 and 904L Dissimilar welds using Hot Wire Turbo TIG
This research involves the dissimilar welding of a novel combination of superalloy 59 and 904L using Hot Wire Turbo TIG welding (HWTT) with ERNiCrMo-13 filler wire. Macroscopic examination revealed defect-free welds with optimized geometry and minimal heat-affected zone. The bead geometry, influence...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2025-06-01
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| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/135583/AMM-2025-2-31-Muthukumaran.pdf |
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| Summary: | This research involves the dissimilar welding of a novel combination of superalloy 59 and 904L using Hot Wire Turbo TIG welding (HWTT) with ERNiCrMo-13 filler wire. Macroscopic examination revealed defect-free welds with optimized geometry and minimal heat-affected zone. The bead geometry, influenced by capillary action and the Marangoni effect, exhibited a 7 mm crest width, 5.5 mm center width, and 2.6 mm depth. Microstructural analysis through FESEM and EDS revealed a substantial 32.06% Mo-enriched secondary phase in the fusion zone, vital for structural reliability and enhancing weldment mechanical properties. Hardness testing revealed 15% higher values in the weld joint compared to base metals. Cryogenic treatment enhanced the weldment tensile strength by up to 10%, with deep cryogenic treatment (DCT) surpassing as-welded samples by 9.5%. Tensile and impact tests, along with fractography images, revealed microstructure-influenced ductile fractures. Charpy impact toughness of the weld fusion zone, at 89 J, showcases favorable properties, 2% lower than alloy 59 but 11.2% higher than 904L, attributed to DCT. |
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| ISSN: | 2300-1909 |