Seo, Wi-Geol Suh, Jin-Yoo Singh, Abhishek Shim, Jae-Hyeok Lee, Hansang Yoo, Keunbong Choi, Shi-Hoon 2024-01-19T14:03:46Z 2024-01-19T14:03:46Z 2022-01-10 2021-07-21 0921-5093 https://pubs.kist.re.kr/handle/201004/116682 In this study, we report the microstructural development of heat-affected zone in P92 heat-resistant steel during creep deformation in cross-weld specimens with dissimilar weld joints between IN740H/P92 materials. Different specimens were prepared via the interruption of creep testing at 50, 70, and 90% of the measured creep-rupture life and were carefully examined and compared. To explain the deformation behavior, finite element analysis was performed in conjunction with softening behavior measured by electron back-scattered diffraction and hardness mapping. The FGHAZ II region defined in this study could be related to the generally known intercritical heat-affected zone, which showed major changes in microstructure during creep deformation due to the accelerated softening by dynamic recrystallization as well as to the development of a triaxial stress state. As a result, cavity formation and growth was observed only in the FGHAZ II region, which ultimately led to fracture. English ELSEVIER SCIENCE SA NI-BASED SUPERALLOY HIGH-TEMPERATURE INCONEL 740H MECHANICAL-PROPERTIES IV CRACKING BEHAVIOR DAMAGE STABILITY Microstructural evolution of P92 steel in IN740H/P92 dissimilar weld joints during creep deformation Article 10.1016/j.msea.2021.141614 1 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.821 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 821 scie scopus 000672444600001 2-s2.0-85108592247 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology - Other Topics Materials Science Metallurgy & Metallurgical Engineering Article NI-BASED SUPERALLOY HIGH-TEMPERATURE INCONEL 740H MECHANICAL-PROPERTIES IV CRACKING BEHAVIOR DAMAGE STABILITY Weld Creep Microstructure Hardness