Effect of activator on mechanical properties and intercrystalline corrosion resistance of austenitic stainless steel weld
| Autor: | Mengnan Feng, Zhen Luo, Yida Zeng, Yangchuan Cai, Huang Zunyue, ZuMing Liu |
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| Rok vydání: | 2016 |
| Předmět: |
Austenite
0209 industrial biotechnology Materials science Gas tungsten arc welding Metallurgy Metals and Alloys 02 engineering and technology Welding engineering.material Intergranular corrosion 021001 nanoscience & nanotechnology Microstructure Indentation hardness Industrial and Manufacturing Engineering Computer Science Applications law.invention Corrosion 020901 industrial engineering & automation law Modeling and Simulation Ceramics and Composites engineering Austenitic stainless steel Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Processing Technology. 234:243-248 |
| ISSN: | 0924-0136 |
| Popis: | 5 mm thick austenitic stainless steel was welded using an A-TIG welding process with in-house developed activators. The microstructure, mechanical properties, and intergranular corrosion resistance of the weld joint were characterized. The microstructure of conventional TIG and A-TIG welds were all austenite with a small amount of δ-ferrite. The included angle between the fusion line and rolling direction of the conventional TIG and A-TIG welds were nearly 0° and 90°, respectively. The microstructure of the A-TIG weld had more and finer δ-ferrite under conditions of less heat input. Compared with the conventional TIG weld, the tensile strength of the A-TIG weld was enhanced approximately 10%, and the elongation was increased by 30%. The microhardness of the conventional TIG weld was found to be 280HV, and the microhardness of the A-TIG weld was 210HV. The corrosion rates of substrate, conventional TIG and A-TIG welds were measured and found to be 0.056 mm/h, 0.110 mm/h and 0.065 mm/h respectively. The chromic carbide content in the conventional TIG weld was higher than that of the A-TIG weld. |
| Databáze: | OpenAIRE |
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