Shim, Jae-Hyeok Kim, Dong-Ik Jung, Woo-Sang Cho, Young Whan Wirth, Brian D. 2024-01-20T21:32:57Z 2024-01-20T21:32:57Z 2021-09-03 2009-04-30 0022-3115 https://pubs.kist.re.kr/handle/201004/132555 Molecular dynamics simulations of the interaction between an edge dislocation and nanosized Cr precipitates in bcc Fe have been performed to investigate the hardening effect of alpha' phases in high Cr ferritic/martensitic steels. The critical resolved shear stress needed for an edge dislocation to overcome Cr precipitates of diameter between 3 and 6 nm is larger than for dislocation glide in the bcc Fe lattice containing 10% Cr solute atoms. This indicates that the precipitation of W phases leads to hardening in high Cr ferritic/martensitic steels. The MD simulations reveal that the interspacing of Cr precipitates plays a more crucial role in the hardening of Fe-Cr alloys than the precipitate size. An attractive interaction exists between an edge dislocation and nanosized Cr precipitates, which is evident as a decrease in total energy when an edge dislocation is placed within in a Cr precipitate. (c) 2008 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV IRON-CHROMIUM-ALLOYS MARTENSITIC STEELS SIMULATION Atomistic modeling of nanosized Cr precipitate contribution to hardening in an Fe-Cr alloy Article 10.1016/j.jnucmat.2008.12.058 1 JOURNAL OF NUCLEAR MATERIALS, v.386-88, pp.56 - 59 JOURNAL OF NUCLEAR MATERIALS 386-88 56 59 scie scopus 000266386900015 2-s2.0-64649097522 Materials Science, Multidisciplinary Nuclear Science & Technology Materials Science Nuclear Science & Technology Article; Proceedings Paper IRON-CHROMIUM-ALLOYS MARTENSITIC STEELS SIMULATION Molecular dynamics Irradiation Nuclear reactor Dislocation Precipitate Fe-Cr Steel