Irradiation-induced embrittlement of Mo, W and their alloys was studied using a three-point bending test. The specimens were in shape of a small disk, identical to a TEM sample. The shift of ductile-brittle transition was observed. In this paper, the finite element method (FEM) was adopted for the analysis of deformation behavior of specimens in the bend test. Spatial distributions of stress and strain of bend specimen were obtained. The plastic deformation that mainly contributes to deformation of specimen was found to be restricted in a small area. Discussion of the size effect in bending deformation is presented. The small three-point bend method was useful to obtain information on mechanical properties of irradiated materials from the load-deflection curves, but in order to extract precise information, i.e. local stress and strain, FEM calculation concerning irradiation hardening should also be conducted simultaneously.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering