Modelling of the influence of Laves phase on the creep properties in 9% Cr steels
2007 (English)In: PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE / [ed] Jaske, CE; Jaske, CE, 2007, 519-526 p.Conference paper (Refereed)
Nucleation and growth of Laves phase are calculated for a multi-component system. Coarsening Of MX, M23C6 and Laves are also determined. The influence on creep strength is discussed by analysing particle hardening and solid solution strengthening. A model for particle size distribution is presented in order to determine the amount of dislocations that can climb across particles or generate Orowan loops.
The model for solid solution hardening is based on a solution of Fick's second law with a moving frame of reference for the concentration profiles around a climbing dislocation. This is done in order to determine the slowdown in dislocations velocity due to solute drag. The results show a loss in creep strength as the Laves phase grows.
Place, publisher, year, edition, pages
2007. 519-526 p.
creep, solid solution hardening, climb, Laves phase
IdentifiersURN: urn:nbn:se:kth:diva-7325DOI: 10.1115/CREEP2007-26417ISI: 000253884500059ScopusID: 2-s2.0-43449094689ISBN: 978-0-7918-4287-4OAI: oai:DiVA.org:kth-7325DiVA: diva2:12303
Pressure Vessels and Piping Conference of the American-Society-of-Mechanical-Engineers Location: San Antonio, TX, JUL 22-26, 2007
QC 201006162007-06-132007-06-132011-09-07Bibliographically approved