Abstract
The effect of grain boundary character distribution (GBCD) on intergranular stress corrosion cracking (IGSCC) in austenitic stainless steels in high temperature water was verified experimentally. GBCD control using the strain annealing method increased the fraction of low-Σ coincidence site lattice (CSL) boundaries and the segmentalized network of random grain boundaries in austenitic stainless steels. The fractions of low-Σ CSL boundaries of GBCD controlled steels were 75-85%, while those of uncontrolled steels were 60-70%. Creviced bent beam tests were conducted at 561 K in pure water containing 8 ppm dissolved oxygen for stress corrosion cracking (SCC) evaluation. The tests revealed that GBCD control suppressed IGSCC initiation or propagation and that cracks were predominantly propagated along random grain boundaries. It is considered that induced lower-Σ CSL boundaries result in high resistance to IGSCC.
| Original language | English |
|---|---|
| Pages (from-to) | 3863-3866 |
| Number of pages | 4 |
| Journal | Materials Science Forum |
| Volume | 475-479 |
| Issue number | V |
| DOIs | |
| Publication status | Published - 2005 |
| Externally published | Yes |
| Event | PRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China Duration: 2004 Nov 2 → 2004 Nov 5 |
Keywords
- Creviced bent beam test
- Grain boundary character distribution
- Sensitization
- Stainless steel
- Stress corrosion cracking
- Thermo-mechanical treatment
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering