应变玻璃统一形成判据的研究进展

Strain glass, as a new type of ferroic functional glass, can be obtained by introducing defects into shape memory alloys. Microscopically, it manifests as a frozen state of long-range disordered nano-martensitic domains. As a shape memory alloy, strain glass exhibits shape memory effects and superelastic behavior, garnering widespread attention. It has been widely applied in everyday life, such as in mobile phones and medical devices, as well as in high-tech fields like aerospace. Additionally, compared to traditional martensitic alloys, strain glass alloys possess unique properties such as the Invar effect and smart damping effect. As a brand-new structural phase transition phenomenon, it has been discovered that not only point defects can induce strain glass transitions, but dislocations and precipitates can also cause these transitions. These three types of strain glass transitions share a unified microscopic physical image. In this paper, the formation criterion of point defect strain glass is summarized, and the transformation process of dislocation strain glass and its formation criterion are successfully reproduced by molecular dynamics simulation method, and the formation criterion of precipitated strain glass is obtained accordingly, and the unified criterion of various strain glass formation conditions is finally established.