The method of adding the initial elements greatly affects the structure and mechanical properties of a tungsten alloy. In this study, the 90(W–20Ta)–Ni–Fe alloy was prepared by the direct addition of elements and W–Ta pre-alloying. The element diffusion and phase transformation behavior...

W-Ni-Fe alloys exhibit high density and excellent mechanical properties, making it attractive in the kinetic energy penetrators. However, its impact fracture behavior has not been fully understood. To investigate the relationship between microstructural parameters and impact behavior, the impact...

A logical strategy to contain the COVID-19 pandemic is to completely isolate everyone for two weeks (the incubation period of the virus). However, such a strategy can have prohibitive economic and social costs and, therefore, will be difficult to implement. At the same time, the current...