Static strain aging of grade 1.4003 ferritic stainless steel was investigated. The test material was pre-strained to 5% elongation under uniaxial tension and subsequently aged at temperatures between 200°C and 300°C. The aging time was varied between one hour and one week. The kinetics of strain aging were evaluated based on increments in the yield strength produced by the heat treatments. The aging heat treatment caused the reappearance of a clearly defined yield point in all cases. The obtained strength increments were between 30 and 60 MPa. The apparent activation energy of the process was 128 kJ/mol. The obtained activation energy agrees with the literature values for interstitial diffusion in high-chromium Fe-Cr alloys determined with internal friction measurements.
Aikajakso
17 huhtik. 2024 → 19 huhtik. 2024
Tapahtuman otsikko
5th International Conference on Thermal Process Modeling and Simulation