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Villigen, Switzerland

Ilchuk N.,EURATOM | Spatig P.,Laboratory for Nuclear Materials | Davydov V.,Materials Science and Simulations | Van Petegem S.,Materials Science and Simulations
Key Engineering Materials | Year: 2014

Residual elastic strains were measured by neutron diffraction using POLDI materials science diffractometer at PSI-Switzerland on pre-loaded notched flat tensile specimens made of the high-chromium tempered martensitic steel F82H-mod steel. To calculate the residual stresses using Hooke's equation, three perpendicular components of the residual strain field were determined. The measured residual strains and stresses were compared with those deduced from finite element simulation calculations. A very good agreement was found for the strains in the loading plane of the specimen while a somewhat larger discrepancy was observed for the out-of-plane residual strain, which was tentatively attributed to an uncertainty in the initial lattice spacing in that direction. © (2014) Trans Tech Publications. Source


Ilchuk N.,EURATOM | Ilchuk N.,Laboratory for Nuclear Materials | Seifert H.-P.,Laboratory for Nuclear Materials | Spatig P.,Laboratory for Nuclear Materials
AIP Advances | Year: 2014

Micro-compression experiments were carried out on micro-pillars, with nominal diameter of 10 μ m and height 20 μ m, and fabricated from a high-chromium tempered martensitic steels developed for nuclear applications. An analytical method was proposed to calculate the imposed compressive displacement on the pillar that allows determining the constitutive behavior up to about 5% of plastic strain. The experimental micro-compression curves were showed to be adequately modeled by the finite element simulations, which were used to validate the main assumption considered for the analytical model development. © 2014 Author(s). Source

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