Carbon and Nitrogen Effects on Sensitization Resistance of Type 347 Stainless Steels
| Autor: | J. H. Yoon, Y. J. Oh, J. H. Hong |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Heat-affected zone
Materials science General Chemical Engineering Metallurgy chemistry.chemical_element General Chemistry Welding engineering.material Microstructure Nitrogen law.invention Corrosion medicine.anatomical_structure chemistry law medicine engineering General Materials Science Austenitic stainless steel Carbon Sensitization |
| Zdroj: | CORROSION. 56:289-297 |
| ISSN: | 1938-159X 0010-9312 |
| Popis: | The sensitization resistance of the stabilized Type 347 (UNS S34700) stainless steels (SS) having different carbon and nitrogen contents was evaluated using the double-loop electrochemical potentiokinetic reactivation (DL-EPR) and ASTM A262, practice E methods. Samples were heat-treated to simulate the coarse grain region of the heat-affected zone (HAZ) during welding and subsequently aged at 948 K for different times. For comparison, DL-EPR tests also were conducted for the unstabilized steels, Type 316 (UNS S31600) and Type 304 (UNS S30400). For Type 347 SS, a criterion for sensitization in accordance with the ASTM A262, practice E test corresponded to a condition of > 10% reactivation ratio (peak reactivation current [Ir] /peak activation current [Ia]) from DL-EPR test. The carbon and nitrogen effects on the sensitization resistance of the Type 347 SS were explained in view of the observed microstructures. By introducing a resistance parameter based on the chemical composition, sensitization r... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|