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Meeting Materials Science & Technology 2019
Symposium Materials for Nuclear Applications
Presentation Title Comparison of In-situ Micro- and Ex-situ Meso-scale Tensile Testing for the Evaluation of Mechanical Properties of Stainless Steels
Author(s) Tanvi Ajantiwalay, Hi Vo, Peter Hosemann, Assel Aitkaliyeva
On-Site Speaker (Planned) Tanvi Ajantiwalay
Abstract Scope Austenitic stainless steels (304SS) are the current structural materials for Light Water Reactors (LWRs) and candidates for the Generation IV reactors. Exposure to neutron radiation during irradiation induces severe microstructural changes, which leads to hardening and embrittlement of the material. An estimate of the mechanical properties at a micro-scale is thus critical in order to determine possible failure mechanisms. Small-scale mechanical testing has emerged as a new technology to reduce the amount of sample material needed and to reduce workers radiation exposure while still obtaining reliable mechanical property data. However, a thorough correlation between the micro- and meso-scales has not been established yet. In this study, the micro- and meso-tensile properties of as-fabricated 304SS are estimated with reference to the crystal orientation maps as obtained from Electron Backscattering Diffraction (EBSD). The load vs. displacement data obtained is then utilized to estimate the yield and ultimate tensile stresses at both scales.


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Combined Use of In-situ and Ex-situ TEM to Characterize Irradiation Induced Dislocation Loops in F/M Steels for Nuclear Applications
Comparison of In-situ Micro- and Ex-situ Meso-scale Tensile Testing for the Evaluation of Mechanical Properties of Stainless Steels
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