Investigation of microstructure, mechanical, and corrosion behavior of nickel-based alloy 625/duplex stainless steel UNS S32205 dissimilar weldments using ERNiCrMo-3 filler metal
| Autor: | Mustafa Tümer, Tuba Karahan, Tolga Mert |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Austenite
0209 industrial biotechnology Materials science Filler metal Mechanical Engineering Metallurgy Alloy Metals and Alloys chemistry.chemical_element 02 engineering and technology Welding engineering.material Microstructure Indentation hardness 020501 mining & metallurgy law.invention Corrosion Nickel 020901 industrial engineering & automation 0205 materials engineering chemistry Mechanics of Materials law engineering |
| Zdroj: | Welding in the World. 65:171-182 |
| ISSN: | 1878-6669 0043-2288 |
| DOI: | 10.1007/s40194-020-01011-0 |
| Popis: | In this study, nickel-based alloy 625 and duplex stainless steel (DSS) UNS S32205 (2205) dissimilar pairs were welded with metal inert gas (MIG) welding process. Weld metal, obtained with the utilization of ERNiCrMo-3 filler wire, was subjected to mechanical, microstructural, and corrosion investigations. V-notch impact tests and micro hardness measurements were realized on dissimilar weld metal. Microstructural changes in weld metal, fusion line, and heat-affected zone were examined using optical, scanning (SEM), and transmission electron microscopes (TEM) with energy-dispersive spectrometry (EDS). Phase precipitations rich of Nb and Mo were detected among dendritic austenite arms in the weld metal. It was observed that ERNiCrMo-3 filler metal had sufficient toughness because of high nickel content. Corrosion tests revealed that weld metal face pass is the least corrosion-resistant zone in weld metal unlike weld root. This is mainly because more intense intermetallics formed in weld metal face compared with the middle of the weld and the root. |
| Databáze: | OpenAIRE |
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