Constitutive Equation Development to Model the Hot Forging of ZERON®100 Super Duplex Stainless Steel and Associated Microstructural Evolution
| Autor: | Jamie Pennington, Glenn Byrne, Bradley P. Wynne |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Austenite Materials science Mechanical Engineering Metallurgy 02 engineering and technology Nitride Flow stress Strain rate 021001 nanoscience & nanotechnology 01 natural sciences Forging chemistry.chemical_compound chemistry Mechanics of Materials Ferrite (iron) Zeron 100 0103 physical sciences General Materials Science 0210 nano-technology Chromium nitride |
| Zdroj: | Key Engineering Materials. 716:632-642 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.716.632 |
| Popis: | A constitutive equation of flow stress based on the Norton-Hoff equation has been developed for the high chromium and nitrogen containing super duplex stainless steel, ZERON® 100 (UNS S32760). This was then used to model, using the finite element method, the strain distribution within a uniaxial compression test under typical two-phase forging conditions. Predictions from the model were used to correlate deformation history to microstructure morphology. The microstructure consisted of austenite, γ islands (both primary and secondary) within a ferrite, δ matrix that contained chromium nitride precipitates. For deformation temperatures of 1050°C and 1120°C, the small secondary austenite was equiaxed, whilst at 1280°C the secondary austenite exhibited a Widmanstätten morphology. The highest level of nitride precipitation occurred at the highest deformation temperatures, i.e. highest volume fraction of ferrite, independent of strain rate. This suggests that nitride precipitation appears to be driven to a greater extent by thermal factors than deformation substructure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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