Takeshi Toyama

TL;DR: In this article, the mechanism of the room temperature plasticity of bulk metallic glasses (BMGs), microstructure observations, density measurements and positron annihilation studies were carried out for Zr-based BMGs cast at various temperatures and post-annealed under different conditions.

TL;DR: In this article, the authors combined APT and TEM to identify the stage at which solute clusters transform into compounds crystallographically distinct from the matrix, in the precipitation of the G-phase (Ni 16 Si 7 Mn 6 ) from ferrite solid solution subjected to isothermal annealing at 673 K.

TL;DR: In this article, the nanostructural evolution of irradiation-induced Cu-rich nanoprecipitates and vacancy clusters in surveillance test specimens of in-service commercial nuclear reactor pressure vessel steel welds of Doel-1 and doel-2 are revealed by combining the three-dimensional local electrode atom probe and positron annihilation techniques.

TL;DR: In this paper, the effects of intergranular P segregation and hardening on the ductile-to-brittle transition temperature (DBTT) in several neutron-irradiated reactor pressure vessel steels with different bulk contents of P and Cu have been investigated using a scanning Auger microbe, a local electrode atom probe and positron annihilation spectroscopy.

TL;DR: In this paper, the correlation of microstructure evolution and hardening was studied in two kinds of A533B-1 steel with high and low levels of Cu irradiated in a range of dose from 0.32 to 9.9