Seo, Wi-Geol Suh, Jin-Yoo Shim, Jae-Hyeok Lee, Hansang Yoo, Keunbong Choi, Shi-Hoon 2024-01-19T18:04:42Z 2024-01-19T18:04:42Z 2021-09-04 2020-02 1044-5803 https://pubs.kist.re.kr/handle/201004/119028 The microstructural factors that contribute to hardening mechanisms were investigated to explain the effect of post-weld heat treatment (PWHT) on the hardness of P92 steel in IN740H/P92 dissimilar weld joints. This study presents experimental analysis of the distribution of microstructural factors such as precipitate size, precipitate fraction, grain size and dislocation density in the heat-affected zone (HAZ) and base metal (BM) of the martensitic heat-resistant steel. Although precipitates mainly decorated the prior-austenite grain boundaries (PAGBs), packet boundaries (PBs), and block boundaries (BBs), their spatial distribution strongly depended on the distance from fusion line and the PWHT conditions. The grain size and the densities of geometrically necessary dislocations (GNDs) also exhibited a non-uniform distribution. The individual contributions of the microstructural factors to hardness were explained by introducing a simple hardening equation that considers the independent effect of different hardening mechanisms. English ELSEVIER SCIENCE INC CREEP-RUPTURE BEHAVIOR AUSTENITIC STAINLESS-STEEL HIGH-TEMPERATURE TENSILE LATH MARTENSITE IV CRACKING ARC EVOLUTION STRENGTH DEFORMATION STABILITY Effect of post-weld heat treatment on the microstructure and hardness of P92 steel in IN740H/P92 dissimilar weld joints Article 10.1016/j.matchar.2019.110083 1 MATERIALS CHARACTERIZATION, v.160 MATERIALS CHARACTERIZATION 160 scie scopus 000519655300023 2-s2.0-85077455014 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science, Characterization & Testing Materials Science Metallurgy & Metallurgical Engineering Article CREEP-RUPTURE BEHAVIOR AUSTENITIC STAINLESS-STEEL HIGH-TEMPERATURE TENSILE LATH MARTENSITE IV CRACKING ARC EVOLUTION STRENGTH DEFORMATION STABILITY PWHT Weld joints Precipitate Dislocation Hardness