Sensitization and Self-healing in Austenitic Stainless Steel: Quantitative Prediction Considering Carbide Nucleation and Growth

Satish Kolli, Thomas Ohligschläger, David Porter, Jukka Kömi

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

The degree of sensitization in an austenitic stainless steel, has been measured using double loop electrochemical reactivation tests, and the measured values compared with predictions based on grain boundary chromium depletion characteristics obtained using the precipitation and diffusion modules of Thermo-Calc. In order to quantitatively predict Cr depletion, the precipitation of M23C6 carbides that are responsible for sensitization has been modelled for isothermal conditions by treating nucleation and growth separately. Based on a critical chromium concentration, a depletion parameter that predicts both sensitization and self-healing is given.
Original languageEnglish
Pages (from-to)2090-2097
Number of pages8
JournalISIJ International
Volume59
Issue number11
DOIs
Publication statusPublished - 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • sensitization
  • self-healing
  • Thermo-Calc
  • precipitation
  • diffusion

Fingerprint

Dive into the research topics of 'Sensitization and Self-healing in Austenitic Stainless Steel: Quantitative Prediction Considering Carbide Nucleation and Growth'. Together they form a unique fingerprint.

Cite this