Abstract
Accelerated degradation mechanism of the heat-resistant steel for high temperature plant was analysed in terms of microstructure and hardness. In order to simulate the microstructure of the steel actually used at 540℃ in the field, isothermal exposure was carried out at 630℃ up to 4,800 hours. The artificial degradation mechanism was comparatively verified to successfully simulate degradation of the long-time used field material. For the artificially degraded specimens, databases including size and aspect ratio of carbide, chemical composition (i.e., Cr/Mo ratio) of grain boundary carbide were built up. These degradation parameters were suggested as fingerprints for PHM (i.e., prognostics health management) of power plants.
| Translated title of the contribution | Comparative Verification of Accelerated Degradation Mechanism of Heat-Resistant Steel for High Temperature Plant with that Used in the Field |
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| Original language | Korean |
| Pages (from-to) | 262-269 |
| Number of pages | 8 |
| Journal | 신뢰성 응용연구 |
| Volume | 15 |
| Issue number | 4 |
| State | Published - Dec 2015 |