Nabarro, FRN2007-02-082007-06-072007-02-082007-06-072000-08Nabarro, FRN. 2000. Grain size, stress and creep in polycrystalline solids. Physics of the solid state, vol 42 (8), pp 1456-14591063-7834http://hdl.handle.net/10204/1672http://hdl.handle.net/10204/1672If a stress sigma is applied to a polycrystal of grain size L, the mode of creep deformation depends on the answers to the following questions: (i) Does sigma exceed the Peierls stress sigma (p); (ii) Does L exceed the dislocation spacing in a Taylor lattice stabilized by sigma (p); (iii) Does Lo exceed the value required for a Frank-Read or Bardeen-Herring source to operate within the grain? (iv) Does L (1/2) sigma exceed the Hall-Petch value required for slip to propagate across a grain boundary? The (L, sigma) plane is thus partitioned into regions in which different creep modes predominate.58761 bytesapplication/pdfencopyright: 2000 AMER INST physicsPeierls stressesSigma stressesPolycrystalline solidsGrain sizeArticleNabarro, F. (2000). Grain size, stress and creep in polycrystalline solids. http://hdl.handle.net/10204/1672Nabarro, FRN "Grain size, stress and creep in polycrystalline solids." (2000) http://hdl.handle.net/10204/1672Nabarro F. Grain size, stress and creep in polycrystalline solids. 2000; http://hdl.handle.net/10204/1672.TY - Article AU - Nabarro, FRN AB - If a stress sigma is applied to a polycrystal of grain size L, the mode of creep deformation depends on the answers to the following questions: (i) Does sigma exceed the Peierls stress sigma (p); (ii) Does L exceed the dislocation spacing in a Taylor lattice stabilized by sigma (p); (iii) Does Lo exceed the value required for a Frank-Read or Bardeen-Herring source to operate within the grain? (iv) Does L (1/2) sigma exceed the Hall-Petch value required for slip to propagate across a grain boundary? The (L, sigma) plane is thus partitioned into regions in which different creep modes predominate. DA - 2000-08 DB - ResearchSpace DP - CSIR KW - Peierls stresses KW - Sigma stresses KW - Polycrystalline solids KW - Grain size LK - https://researchspace.csir.co.za PY - 2000 SM - 1063-7834 T1 - Grain size, stress and creep in polycrystalline solids TI - Grain size, stress and creep in polycrystalline solids UR - http://hdl.handle.net/10204/1672 ER -