Microstructural Heterogeneity and Mechanical Properties of a Welded Joint of an Austenitic Stainless Steel Article Swipe
Jairo Alberto Muñoz
,
E. D. Dolgach
,
Vanina Tartalini
,
Pablo Risso
,
Martina Ávalos
,
R.E. Bolmaro
,
José-María Cabrera
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.3390/met13020245
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.3390/met13020245
This research presents the microstructural and mechanical evolution throughout the welded seam of an austenitic stainless steel (ASS) tube. It was found that the main hardness decrement occurred in the fusion zone (FZ), followed by the heat-affected zone (HAZ) and the base material (BM). Optical microscopy indicated a dendritic structure in FZ and heterogeneous austenitic grain size from the HAZ towards the BM, ranging from 100 µm to 10 µm. The welding process generated an intense texture around the FZ and the HAZ, while the BM still showed an extrusion-like texture. In terms of mechanical behavior, the largest austenite grain size in the FZ led to the lowest strength and ductility of all zones due to the earliest strain localization manifested by heterogeneous strain distribution. However, the strain localization in all zones appeared after 0.4 true strain, indicating an overall good ductility of the seam. These high values were related to two microstructure characteristics: (1) the 10% δ-ferrite after solidification in the FZ favored by the Creq/Nieq=1.67 relationship that delayed the crack propagation along the austenite grains and (2) the heterogeneous microstructure made up of soft austenite and hard martensite in the HAZ and BM producing multiple strain concentrations. Kernel Average Misorientation (KAM) maps obtained by Electron Back-Scattering Diffraction (EBSD) allowed observing higher internal misorientations in the FZ than in the HAZ due to interconnected walls between the δ-ferrite grains. However, the largest KAM values were observed in the BM between γ-austenite and the deformation-induced α’-martensite phases. X-ray diffraction revealed that the residual stresses in the cross-section of the welded seam were compression-type and then switched to tension-type in the outer surface.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/met13020245
- https://www.mdpi.com/2075-4701/13/2/245/pdf?version=1676442644
- OA Status
- gold
- Cited By
- 10
- References
- 48
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4318478376
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4318478376Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/met13020245Digital Object Identifier
- Title
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Microstructural Heterogeneity and Mechanical Properties of a Welded Joint of an Austenitic Stainless SteelWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-01-27Full publication date if available
- Authors
-
Jairo Alberto Muñoz, E. D. Dolgach, Vanina Tartalini, Pablo Risso, Martina Ávalos, R.E. Bolmaro, José-María CabreraList of authors in order
- Landing page
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https://doi.org/10.3390/met13020245Publisher landing page
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https://www.mdpi.com/2075-4701/13/2/245/pdf?version=1676442644Direct link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
- OA URL
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https://www.mdpi.com/2075-4701/13/2/245/pdf?version=1676442644Direct OA link when available
- Concepts
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Materials science, Austenite, Microstructure, Electron backscatter diffraction, Metallurgy, Misorientation, Ferrite (magnet), Welding, Martensite, Heat-affected zone, Austenitic stainless steel, Ductility (Earth science), Composite material, Grain boundary, Creep, CorrosionTop concepts (fields/topics) attached by OpenAlex
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10Total citation count in OpenAlex
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2025: 3, 2024: 1, 2023: 6Per-year citation counts (last 5 years)
- References (count)
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48Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| sustainable_development_goals[0].display_name | Life below water |
| citation_normalized_percentile.value | 0.74573561 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |