Journal
MICROSCOPY AND MICROANALYSIS
Volume 19, Issue -, Pages 95-98Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S1431927613012415
Keywords
9-12% Cr; microstructure; stress; EBSD; mechanical property; lifetime assessment
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Funding
- Doosan Heavy Industries & Construction Co. Ltd.
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2011-0030803]
- National Research Foundation of Korea [2011-0030803] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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High-chromium heat-resistant steel has been widely used as the key material to improve the condition of steam pressure and temperature in the modern high-efficiency power plants. Despite the use of the steel above 550 degrees C for several decades, its major failure is owing to the creep fracture. In this study, the effect of creep stress on the microstructure in 9-12% Cr steel has been investigated microscopically, and it is clarified that the creep stress enhances precipitation of Laves phase and influences the lath width and dislocation density in lath interior.
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