TY - JOUR
T1 - Modelling recrystallization and grain growth of tungsten induced by neutron displacement defects
AU - Mannheim, A.
AU - van Dommelen, J.A.W.
AU - Geers, M.G.D.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - A multi-scale model is developed for the long-term microstructural evolution of tungsten under cascade damage conditions and for different irradiation temperatures as they may occur in a divertor of a nuclear fusion reactor. In particular the competition between damage accumulation and recovery processes, including grain growth and recrystallization are captured. A mean-field model for recrystallization and grain growth is coupled to a cluster dynamics model for the evolution of the neutron damage. The displacement damage is produced in the form of defect clusters, for which a parameterized temperature-dependent scaling law is implemented. A physically-based grain nucleation model is implemented in the mean-field recrystallization model. The competition between the various temperature dependent mechanisms and their effects on the evolving microstructure is studied in the range of T= 1000 °C - 1400 °C
AB - A multi-scale model is developed for the long-term microstructural evolution of tungsten under cascade damage conditions and for different irradiation temperatures as they may occur in a divertor of a nuclear fusion reactor. In particular the competition between damage accumulation and recovery processes, including grain growth and recrystallization are captured. A mean-field model for recrystallization and grain growth is coupled to a cluster dynamics model for the evolution of the neutron damage. The displacement damage is produced in the form of defect clusters, for which a parameterized temperature-dependent scaling law is implemented. A physically-based grain nucleation model is implemented in the mean-field recrystallization model. The competition between the various temperature dependent mechanisms and their effects on the evolving microstructure is studied in the range of T= 1000 °C - 1400 °C
UR - http://www.scopus.com/inward/record.url?scp=85046371197&partnerID=8YFLogxK
U2 - 10.1016/j.mechmat.2018.04.008
DO - 10.1016/j.mechmat.2018.04.008
M3 - Article
VL - 123
SP - 43
EP - 58
JO - Mechanics of Materials
JF - Mechanics of Materials
SN - 0167-6636
ER -