CA6NM stainless steel submitted to different thermal cycles in the Gleeble weld simulator
| Autor: | B. G. Lima, Maria Ismenia Sodero Toledo Faria, J. C. Lourenço, Carlos Angelo Nunes |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Small volume Scanning electron microscope Mechanical Engineering Applied Mathematics General Engineering Aerospace Engineering 02 engineering and technology Welding Microstructure Indentation hardness Industrial and Manufacturing Engineering 020501 mining & metallurgy law.invention 0205 materials engineering Optical microscope law Automotive Engineering Thermal Base metal Simulation |
| Zdroj: | Journal of the Brazilian Society of Mechanical Sciences and Engineering. 40 |
| ISSN: | 1806-3691 1678-5878 |
| DOI: | 10.1007/s40430-018-1375-2 |
| Popis: | Subregions of CA6NM (ASTM 743) heat-affected zones—HAZ, were investigated in a microstructural and mechanical perspective. Those subregions suffer microstructural changes in welded joints, being considered the most critical regions in welded components. As the HAZ subregions possess very small volume, base metal was submitted to a welding simulation in the physical Gleeble simulator, which allows to reproduce the same microstructures found in real welding, allowing characterization of the different subregions in HAZ. Simulated samples were analyzed by optical microscopy (OM), scanning electron microscopy and X-ray diffraction measurements. For mechanical properties, evaluation samples were submitted to impact and hardness measurements. Microstructural and mechanical analysis for the experiments showed that δ-ferrite is found in all HAZ subregions, being related to higher microhardness and higher absorbed energy in impact. Higher heat inputs promoted higher hardness levels and higher δ-phase amounts. |
| Databáze: | OpenAIRE |
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