A research team led by Professor Hyung Seop Kim at the Graduate Institute of Ferrous and Eco Materials Technology at Pohang University of Science and Technology (POSTECH) in South Korea has developed a 3D-printed high-entropy alloy that simultaneously maintains high strength and ductility across an extreme temperature range from -196°C to 600°C. The results were published in the international journal Nature Materials in 2024 (the news was released on the 2nd), and the National Research Foundation of Korea announced them publicly on the 5th. The alloy is formed directly by laser powder bed fusion without any additional heat treatment and achieves excellent mechanical properties; target applications point to cryogenic storage facilities and aerospace metal components. The team designed a high-entropy alloy composed of eight elements: cobalt, chromium, iron, nickel, aluminum, titanium, vanadium, and tantalum, and used the laser powder bed fusion (LPBF) process to melt and build up metal powder layer by layer. The rapid heating and cooling during printing spontaneously formed a microstructure in which precipitate phases are interconnected in a network, eliminating the post-processing heat treatment step required in conventional processes to form precipitates. Tensile tests were conducted at three temperature points: -196°C, 25°C room temperature, and 600°C. The alloy achieved a yield strength above 1 GPa and uniform elongation of 19%–26% at all temperatures. Electron microscopy observations showed that differences in atomic arrangement at the interfaces between the precipitates and the matrix govern two complementary deformation mechanisms: some interfaces transfer deformation into the interior of the precipitates, promoting coordinated deformation of the matrix and precipitates, while other interfaces suppress further deformation by accumulating dislocations. Atomic-scale calculations further confirmed that the alloy's deformation characteristics change little with temperature. The process route of this research is built directly on metal powders and additive manufacturing: using eight-element high-entropy alloy powder as the raw material, melting and forming it layer by layer via LPBF, and using the rapid thermal cycles of the printing process itself to generate network-shaped precipitates in situ, thereby omitting a separate heat treatment step. The news explicitly points to potential applications for this alloy in cryogenic storage facilities and metal components in the aerospace field.