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Inhibition of the second phase precipitation and improvement of intergranular corrosion resistance by boron segregation at the grain boundary of S31254 superaustenitic stainless steel
- Source :
- Corrosion Communications, Vol 15, Iss , Pp 1-12 (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- The inhibition of Mo segregation and phase precipitation is vital for improving the hot workability and corrosion resistance of superaustentic stainless steels (SASS). The boron non-equilibrium segregation of S31254 SASS was implemented through solid solution, air cooling, and diffusion at low-temperature treatment (SADT). The precipitation process and intergranular corrosion (IGC) of S31254 SASS with various boron distributions were researched at a sensitive temperature. The second phases were observed and identified by SEM and TEM. IGC susceptibility was evaluated by double-loop potentiodynamic reactivation (DL-EPR) measurements. The SADT treatment promoted more segregation of B at the grain boundary, leading to lower amounts of grain boundary precipitation before aging for 6 h. The decrease of σ phases in B-regulated samples enhances the IGC resistance, compared with the samples without B addition specimens.
Details
- Language :
- English
- ISSN :
- 26672669
- Volume :
- 15
- Issue :
- 1-12
- Database :
- Directory of Open Access Journals
- Journal :
- Corrosion Communications
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.089030aa02a04457b05d0848ad634dbf
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.corcom.2023.08.006