My research is about how the crystallographic structure of iron-nickel alloy, its mechanical properties and phase transition vary with temperature, pressure, chemical composition and other conditions. I am trying to investigate those property variations by high temperature experiments, theoretical calculation and computational modeling. The motivation of this project is related to the fact that the Earth's inner core is believed to be formed mainly by the same alloy. It is therefore vital to understand the working of our planet, because all the globe-scale changes, such as earthquakes, are more or less related to the interior activities of our planet.