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Correlation of tensile and flexural properties of materials for fusion applications

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The High Flux Test Module (HFTM) in International Fusion Material Irradiation Facility (IFMIF-DONES) has a purpose to irradiate material specimens to a very high fluence (DEMO relevant ones) in a very few years. The current design of HFTM is described in [1], given that DONES will involve external labs for testing, the sub-miniaturization of the currently defined HFTM matrix is needed to invoke cost/time-reduced transportation and handling of the test samples. With this respect, all types of tests could be sub-divided into two types: (i) design data and (ii) supportive/screening data. This task will contribute to the development and validation of the sub-miniaturized samples to generate supportive data to enable pre-selection of materials as well as to guide the test regimes for standardized samples needed to generate design data. This action includes the development of simplified sub-size geometry to perform bending tests on Tungsten, Steels and CuCrZr from which the extracted data will be linked to the tensile properties as well as could be used to identify the transition temperature range for standardized fracture toughness tests. The implementation of the technical work is supported by FEM analysis, which includes the development of a computational algorithm to extract tensile properties of materials from sub-miniaturized three-point bending (SUB-3PB) tests with ANSYS software.

[1] Nuclear Materials and Energy 16 (2018) 245–248 / Arbeiter, Diegele, et al.

Objective

A reverse engineering iterative subroutine based on an isotropic rate-sensitive plasticity model has been programmed to extract the constitutive laws for a set of available SUB-3PB test experimental data (various test temperature, strain rate etc) and material microstructure (grain size, grain orientation, dislocation density). The thorough testing and validation of the algorithms are needed prior to accepting the subroutine for the production phase, which will be performed at the beginning of the internship project.

Later on the optimization of SUB-3PB sample geometry with an acceptable level of accuracy and statistical significance will be explored. The approach will be validated using neutron irradiated samples, being currently tested in the Mechanical Lab of LHMA.
 

The minimum diploma level of the candidate needs to be

  • A2: Upper secondary school (+7th year BSO)

The candidate needs to have a background in

  • Physics

Expert group

Microstructural and Non-destructive Analysis

SCK CEN Mentor

Bakaev Alexander
abakaev [at] sckcen.be
+32 (0)14 33 30 89

SCK CEN Co-mentor

Terentyev Dmitry
dterenty [at] sckcen.be
+32 (0)14 33 31 97