Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels
In this work, 2 mm thick medium-Mn austenitic stainless steel (MMn–SS) plates were joined with austenitic NiCr stainless steel (NiCr–SS) and low-carbon steel (LCS) using the gas tungsten arc welding technique. A precise adjustment of the welding process parameters was conducted to achieve high-quali...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/4/1624 |
| _version_ | 1797619611328315392 |
|---|---|
| author | Mahmoud Khedr I. Reda Ibrahim Matias Jaskari Mohammed Ali Hamed A. Abdel-Aleem Tamer S. Mahmoud Atef Hamada |
| author_facet | Mahmoud Khedr I. Reda Ibrahim Matias Jaskari Mohammed Ali Hamed A. Abdel-Aleem Tamer S. Mahmoud Atef Hamada |
| author_sort | Mahmoud Khedr |
| collection | DOAJ |
| description | In this work, 2 mm thick medium-Mn austenitic stainless steel (MMn–SS) plates were joined with austenitic NiCr stainless steel (NiCr–SS) and low-carbon steel (LCS) using the gas tungsten arc welding technique. A precise adjustment of the welding process parameters was conducted to achieve high-quality dissimilar joints of MMn–SS with NiCr–SS and LCS. The microstructural evolution was studied using laser scanning confocal and electron microscopes. Secondary electron imaging and electron backscatter diffraction (EBSD) techniques were intensively employed to analyze the fine features of the weld structures. The mechanical properties of the joints were evaluated by uniaxial tensile tests and micro-indentation hardness (H<sub>IT</sub>). The microstructure of the fusion zone (FZ) in the MMn–SS joints exhibited an austenitic matrix with a small fraction of δ-ferrite, ~6%. The tensile strength (TS) of the MMn–SS/NiCr–SS joint is significantly higher than that of the MMn–SS/LCS joint. For instance, the TSs of MMn–SS joints with NiCr–SS and LCS are 610 and 340 MPa, respectively. The tensile properties of MMn–SS/LCS joints are similar to those of BM LCS, since the deformation behavior and shape of the tensile flow curve for that joint are comparable with the flow curve of LCS. The H<sub>IT</sub> measurements show that the MMn–SS/NiCr–SS joint is significantly stronger than the MMn–SS/LCS joint since the H<sub>IT</sub> values are 2.18 and 1.85 GPa, respectively. |
| first_indexed | 2024-03-11T08:29:27Z |
| format | Article |
| id | doaj.art-7791f5a050cc48aba3dee8dfe871c22b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T08:29:27Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-7791f5a050cc48aba3dee8dfe871c22b2023-11-16T21:52:19ZengMDPI AGMaterials1996-19442023-02-01164162410.3390/ma16041624Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed SteelsMahmoud Khedr0I. Reda Ibrahim1Matias Jaskari2Mohammed Ali3Hamed A. Abdel-Aleem4Tamer S. Mahmoud5Atef Hamada6Mechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo 11629, EgyptMechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo 11629, EgyptKerttu Saalasti Institute, Future Manufacturing Technologies (FMT), University of Oulu, FI-85500 Nivala, FinlandSteel Technology Department, Central Metallurgical Research and Development Institute (CMRDI), Helwan 11722, EgyptDepartment of Welding Technology and Inspection, Central Metallurgical Research and Development Institute, El-Tebbin, Helwan 11421, EgyptMechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo 11629, EgyptKerttu Saalasti Institute, Future Manufacturing Technologies (FMT), University of Oulu, FI-85500 Nivala, FinlandIn this work, 2 mm thick medium-Mn austenitic stainless steel (MMn–SS) plates were joined with austenitic NiCr stainless steel (NiCr–SS) and low-carbon steel (LCS) using the gas tungsten arc welding technique. A precise adjustment of the welding process parameters was conducted to achieve high-quality dissimilar joints of MMn–SS with NiCr–SS and LCS. The microstructural evolution was studied using laser scanning confocal and electron microscopes. Secondary electron imaging and electron backscatter diffraction (EBSD) techniques were intensively employed to analyze the fine features of the weld structures. The mechanical properties of the joints were evaluated by uniaxial tensile tests and micro-indentation hardness (H<sub>IT</sub>). The microstructure of the fusion zone (FZ) in the MMn–SS joints exhibited an austenitic matrix with a small fraction of δ-ferrite, ~6%. The tensile strength (TS) of the MMn–SS/NiCr–SS joint is significantly higher than that of the MMn–SS/LCS joint. For instance, the TSs of MMn–SS joints with NiCr–SS and LCS are 610 and 340 MPa, respectively. The tensile properties of MMn–SS/LCS joints are similar to those of BM LCS, since the deformation behavior and shape of the tensile flow curve for that joint are comparable with the flow curve of LCS. The H<sub>IT</sub> measurements show that the MMn–SS/NiCr–SS joint is significantly stronger than the MMn–SS/LCS joint since the H<sub>IT</sub> values are 2.18 and 1.85 GPa, respectively.https://www.mdpi.com/1996-1944/16/4/1624medium-Mn stainless steelNiCr stainless steellow-carbon steelfusion weldingmechanical performance |
| spellingShingle | Mahmoud Khedr I. Reda Ibrahim Matias Jaskari Mohammed Ali Hamed A. Abdel-Aleem Tamer S. Mahmoud Atef Hamada Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels Materials medium-Mn stainless steel NiCr stainless steel low-carbon steel fusion welding mechanical performance |
| title | Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels |
| title_full | Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels |
| title_fullStr | Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels |
| title_full_unstemmed | Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels |
| title_short | Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels |
| title_sort | microstructural evolution and mechanical performance of two joints of medium mn stainless steel with low and high alloyed steels |
| topic | medium-Mn stainless steel NiCr stainless steel low-carbon steel fusion welding mechanical performance |
| url | https://www.mdpi.com/1996-1944/16/4/1624 |
| work_keys_str_mv | AT mahmoudkhedr microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels AT iredaibrahim microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels AT matiasjaskari microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels AT mohammedali microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels AT hamedaabdelaleem microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels AT tamersmahmoud microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels AT atefhamada microstructuralevolutionandmechanicalperformanceoftwojointsofmediummnstainlesssteelwithlowandhighalloyedsteels |