Atomic simulation of helium trapping in displacement cascades

Abstract

A molecular dynamics method is applied to simulate displacement cascades in He-doped α-Fe and attention is paid to the clustering of He-participating defect clusters to reveal the trapping behaviors of helium atoms in radiation processes.

Stability and migration of transmutation atoms (H/He) in Ti3AlC2: first principles calculations

“…It is widely shared that the effect of H/He is one of the primary concerns related to the performance degradation of structural materials. 23 The accumulation of H/ He atoms may induce the formation of H/He bubbles, which will lead to void swelling and low-temperature intergranular embrittlement, surface roughening, blistering, and premature creep rupture at high temperature. [24][25][26] On one hand, Song et al have experimentally observed the structural stability of He bubble with the shape of sphere, string, and platelet under 500 keV He ions irradiation in Ti 3 AlC 2 .…”