A Study on Structural, Corrosion, and Sensitization Behavior of Ultrafine and Coarse Grain 316 Stainless Steel Processed by Multiaxial Forging and Heat Treatment
| Autor: | Seyed Rahim Kiahosseini, Seyyed Javad Mohammadi Baygi, Gholamreza Khalaj, Razieh Samadipour, Ali Khoshakhlagh |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Mechanical Engineering Metallurgy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Forging Corrosion chemistry.chemical_compound medicine.anatomical_structure chemistry Mechanics of Materials Residual stress 0103 physical sciences engineering Pitting corrosion medicine General Materials Science Austenitic stainless steel 0210 nano-technology Chromium carbide Sensitization |
| Zdroj: | Journal of Materials Engineering and Performance. 27:271-281 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | Cubic specimens from AISI 316 stainless steel were multiaxially forged to 15 passes and annealed at 1200 °C for 1, 2, and 3 h and finally sensitized at 700 °C for 24 h. Examination of samples indicated that the hardness of the annealed samples was reduced from 153 to 110, 81, and 74 HV for as-received sample and under 1, 2, and 3 h of annealing, and increased from 245 to 288 HV for samples forged at 3 and 7 passes. However, no significant changes were observed in a large number of passes and at about 300 HV. Degree of sensitization of samples was increased to approximately 27.3% at 3-h annealing but reduced to 1.23% by 15 passes of MF. The potentiodynamic polarization test shows that the breakdown potentials decreased with annealing time from 0.6 to − 102 (mV/SCE) for as-received and 3-h annealed specimen. These potentials increased to approximately − 16.5 mV with the increase in MF passes to 15. These observations indicated that the chromium carbide deposition affects Cr-depleted zone, which can subsequently affect the degree of sensitization and pitting corrosion resistance of AISI 316 austenitic stainless steel. |
| Databáze: | OpenAIRE |
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