首页|Probabilistic analysis of cleavage fracture in commercial polycrystalline tungsten
Probabilistic analysis of cleavage fracture in commercial polycrystalline tungsten
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NSTL
Elsevier
Polycrystalline tungsten is a promising candidate as plasma-facing armour material in future fusion reactors. Below the DBTT tungsten shows brittle or semi-brittle behaviour with no or little plastic deformation before cleavage fracture. Moreover, tungsten has an inherent low fracture toughness as well as a large scatter within the strength properties. This requires a statistical treatment of the strength values. Therefore, four-point bending tests in the temperature range of room temperature (RT) to 400 degrees C were performed to allow the Weibull analysis in brittle failure regime and/or the Beremin model analysis in case of onset of plastic behaviour while approaching the DBTT temperature. The analyses are supported by FE simulations. Weibull and Beremin parameter values are determined from the simulation results using post-processing codes. (c) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier
