Lee, K. H. Park, D. B. Kwun, S. I. Huh, J. Y. Suh, J. Y. Shim, J. H. Jung, W. S. 2024-01-20T15:30:52Z 2024-01-20T15:30:52Z 2021-09-04 2012-02-28 0921-5093 https://pubs.kist.re.kr/handle/201004/129523 The effect of creep deformation on the microstructural evolution of an 11CrMoVNb ferritic heat resistant steel during high temperature creep tests was investigated. The creep test was performed within a temperatures range from 593 to 621 degrees C under different stress levels. For the detailed understanding of precipitate coarsening behavior, transmission electron microscopy (TEM) was used to analyze thin foils and replica films obtained from the crept specimens. The major precipitates were found to be M23C6, MX and Cr2N phases and there was no change in precipitation sequence during creep. Coarsening behavior of the precipitates and growth behavior of martensite laths of the crept specimens were carefully examined in both regions of the grip and gage parts of the specimens in order to identify the effect of creep deformation. On the whole, precipitate size increased with increasing creep rupture time. On the other hand, precipitate coarsening and martensite lath widening were pronounced in the gage part compared to those in the grip part. This suggests that the creep deformation accelerates the rates of precipitate coarsening and martensite lath widening. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA LONG-TERM CREEP ADVANCED FERRITIC STEELS USC POWER-PLANTS CR STEELS BEHAVIOR Effect of creep deformation on the microstructural evolution of 11CrMoVNb heat resistant steel Article 10.1016/j.msea.2011.12.074 1 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.536, pp.92 - 97 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 536 92 97 scie scopus 000301319300013 2-s2.0-84862802290 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology - Other Topics Materials Science Metallurgy & Metallurgical Engineering Article LONG-TERM CREEP ADVANCED FERRITIC STEELS USC POWER-PLANTS CR STEELS BEHAVIOR High Cr ferritic steel Creep rupture strength Precipitates Coarsening