Study of internal lattice strain distributions in stainless steel using a full-field elasto-viscoplastic formulation based on fast Fourier transforms
作者： AK Kanjarla , Ricardo A Lebensohn , L Balogh , CN Tomé , None
DOI: 10.1016/J.ACTAMAT.2012.02.014
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摘要: Abstract In this work, the evolution of internal lattice strains in face-centered cubic stainless steel under uniaxial tension is studied using a recently developed full-field elasto-viscoplastic formulation based on fast Fourier transforms. The shape diffraction peaks simulated, and predicted (peak shift broadening) are compared with experimental measurements obtained by situ tensile neutron diffraction. Detailed analysis strain distributions reveal that {1 0 0} {1 1 0} transverse families exhibit bimodal nature, more sensitive to local grain interactions longitudinal strains. A comparison results mean-field indicates type III (intragranular) stresses play much larger role than II (intergranular) peak broadening.
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