In situ transmission-electron-microscopy observation of solid-state amorphization behavior in Ti50Ni44Fe6 alloy by high-voltage electron microscopy

The solid-state amorphization (SSA) behavior of the intermetallic compound Ti50Ni44Fe6 was investigated using high-voltage electron microscopy. In situ transmission electron microscopy clarified a particular SSA process consisting of the appearance of diffuse scattering during the initial stage of SSA and the subsequent disappearance of the diffuse scattering during irradiation. Irradiation-induced commensurate–incommensurate (C–IC) and IC–B2 transformations occurred before SSA. Both the martensitic transformation (MT) and SSA behaviors were significantly affected by the replacement of Ni by Fe in Ti50Ni50−xFex.