Ian M. Robertson

TL;DR: In this paper, the authors performed deformation studies in situ in a transmission electron microscope equipped with an environmental cell to elucidate the mechanisms of hydrogen embrittlement and found that solute hydrogen can increase the velocity of dislocations, increase the crack propagation rate, decrease stacking-fault energy of 310s stainless steel and increase the propensity for edge character dislocation.

TL;DR: The connection between hydrogen-enhanced plasticity and the hydrogen-induced fracture mechanism and pathway is established through examination of the evolved microstructural state immediately beneath fracture surfaces including voids, quasi-cleavage, and intergranular surfaces as discussed by the authors.

TL;DR: This study demonstrates enhancement of radiation tolerance with the suppression of void formation by two orders magnitude at elevated temperatures in equiatomic single-phase concentrated solid solution alloys, and reveals its controlling mechanism through a detailed analysis of the depth distribution of defect clusters and an atomistic computer simulation.

TL;DR: The effect of hydrogen on the interaction between dislocations and other elastic centers in high-purity aluminum and stainless steel has been directly observed during deformation experiments in situ in an environmental cell transmission electron microscope as discussed by the authors.

TL;DR: In this paper, the effect of hydrogen on fracture in the h.c.p. α Ti-4 wt % Al alloy and the role of titanium hydride in the fracture process have been studied by deforming samples in situ in a highvoltage electron microscope equipped with an environmental cell.