Research progress on low-temperature properties of common structural materials

With the rapid development of low-temperature fields such as deep space exploration，polar scientific research，low-temperature storage and transportation，the service conditions for low-temperature structural components are becoming increasingly stringent. Therefore，low-temperature materials have gradually become a research hotspot in the world. This article mainly summarizes the low-temperature performance and related mechanisms of common structural materials such as low-temperature steel，aluminum alloy，titanium alloy，aluminum matrix composites and resin matrix composites. The effects of different crystal structures，alloy types，alloying elements and other factors on the mechanical properties of structural materials such as low temperature strength，plasticity and toughness，and the mechanism of low temperature deformation，strengthening and toughening are concluded. The application and prospect of different grades of low-temperature structural materials in different fields at home and abroad are also briefly introduced. The future research prospect of low-temperature materials is put forward.