Review of small specimen test techniques for irradiation testing

Simultaneous irradiation and thermal effects on 16 MeV proton irradiated tungsten samples

“…The possibility of sample miniaturization to reduce radiation exposure to personnel and machine has been previously investigated for fission reactors [16][17][18][19]. In order to have easy inter-changeability and compare values between fission and proton irradiation, the proton samples were designed conforming to the above recommendations.…”

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16 MeV protons have been used to irradiate 300 μm thick macroscopic W samples in a pilot experiment to 0.006 dpa damage dose under low and high temperature scenarios of ∼373 K and ∼1223 K, respectively. The linear pre-Bragg region has been used for damage where the electronic loss (heat) in the sample amounts to 1.5 MW • m −2 .

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HIGH TEMPERATURE MECHANICAL PROPERTIES OF Al-Al4C3 COMPOSITE PRODUCED BY MECHANICAL ALLOYING

“…(1) with p ~ 1 strongly suggests the constrained intergranular cavity growth as one of the basic processes in creep fracture. [25,26]. The time dependence of the central deflection was registered and the minimum deflection rate was determined.…”

Micromechanical testing of unirradiated and helium ion irradiated SA508 reactor pressure vessel steels: Nanoindentation vs in-situ microtensile testing

“…Small-scale mechanical techniques [17] that enable characterization of small interaction volumes are therefore needed to obtain mechanical properties data from ion irradiated materials. Reducing the size of samples to non-standardized sizes is not a novel approach in the nuclear materials field as this has been implemented for decades [18]. The results from miniature tensile, compact tension and sub-sized Charpy V-notch (CVN) have been used in various irradiation programmes with fairly good agreement with larger specimens [18].…”

“…Reducing the size of samples to non-standardized sizes is not a novel approach in the nuclear materials field as this has been implemented for decades [18]. The results from miniature tensile, compact tension and sub-sized Charpy V-notch (CVN) have been used in various irradiation programmes with fairly good agreement with larger specimens [18]. The further recent development of micromechanical testing, brought about by focused ion beam (FIB) milling, allows researchers to evaluate mechanical properties at a micro scale reducing considerably sample volumes: the gauge length of each specimen being only a few microns instead of millimetres.…”