Lee, Kyu-Ho Suh, Jin-Yoo Huh, Joo-Youl Park, Dae-Bum Hong, Sung-Min Shim, Jae-Hyeok Jung, Woo-Sang 2024-01-20T11:33:44Z 2024-01-20T11:33:44Z 2021-09-05 2013-09 1044-5803 https://pubs.kist.re.kr/handle/201004/127719 The effect of Nb and Cu addition on the creep properties of a high Mn-N austenitic stainless steel was investigated at 600 and 650 degrees C. In the original high Mn-N steel, which was initially precipitate-free, the precipitation of M(23)G(6) = Cr, Fe) and Cr2N took place mostly on grain boudaries during creep deformation. On the other hand, the minor addition of Nb resulted in high number density of Z-phases (CrNbN) and MX (M = Nb; X = C, N) carbonitrides inside grains by combining with a high content of N, while suppressing the formation of Cr2N. The addition of Cu gave rise to the independent precipitation of nanometer-sized metallic Cu particles. The combination of the different precipitate-forming mechanisms associated with Z-phase, MX and Cu-rich precipitates turned out to improve the creep-resistance significantly. The thermodynamics and kinetics of the precipitation were discussed using thermo-kinetic simulations. (C) 2013 Elsevier Inc. All rights reserved. English ELSEVIER SCIENCE INC HEAT-RESISTANT STEEL STRENGTHENING MECHANISMS CAVITATION BEHAVIOR MICROSTRUCTURE DEFORMATION STABILITY ALLOY PHASE Effect of Nb and Cu on the high temperature creep properties of a high Mn-N austenitic stainless steel Article 10.1016/j.matchar.2013.05.015 1 MATERIALS CHARACTERIZATION, v.83, pp.49 - 57 MATERIALS CHARACTERIZATION 83 49 57 scie scopus 000324605500006 2-s2.0-84879959988 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science, Characterization & Testing Materials Science Metallurgy & Metallurgical Engineering Article HEAT-RESISTANT STEEL STRENGTHENING MECHANISMS CAVITATION BEHAVIOR MICROSTRUCTURE DEFORMATION STABILITY ALLOY PHASE High Mn-N austenitic steel Creep strength Precipitates Z-phase Cu particle Coarsening