Effect of Heat Input on Microstructure, Residual Stress, and Corrosion Resistance of UNS 32101 Lean Duplex Stainless Steel Weld Joints
| Autor: | Billel Cheniti, Khadidja Khenfer, Naima Ouali, Samuel Branchu, Jamal Fajoui, Brahim Idir, Brahim Belkessa |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Austenite Diffraction Work (thermodynamics) Materials science Mechanical Engineering Gas tungsten arc welding Metallurgy technology industry and agriculture 02 engineering and technology Welding respiratory system 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Corrosion law.invention Mechanics of Materials Residual stress law 0103 physical sciences General Materials Science 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 28:4252-4264 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | In the present work, the influence of heat input on phase balance, residual stresses and corrosion resistance of UNS 32101 lean duplex stainless steel welds has been investigated. Three weldment types were obtained with different heat inputs by varying welding current, using gas tungsten arc welding process. The results revealed that increasing heat input caused a significant microstructural evolution with high austenite fraction in weld metals. The residual stresses were measured on the surface and through the sample’s thickness by x-ray diffraction technique based on Sin2ψ method. The results showed an inversely proportional relationship between the heat input and the compressive residual stresses on the surface and through the thickness of the weld metal. Potentiodynamic polarization tests of the different welded joints evaluated in 3.5% NaCl solution exhibited high corrosion resistance of the weld metal produced with the low heat input. |
| Databáze: | OpenAIRE |
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