The new metal alloy can keep its form in a very long temperature scale.

"A POSTECH research team has developed a nickel-based high-entropy alloy (HEA) that maintains its strength and ductility across extreme temperatures from -196 °C to 600 °C. This temperature-insensitive “Hyperadaptor” alloy, reinforced by nanoscale precipitates, shows promise for aerospace, automotive, and energy applications. (Artist’s concept). Credit: SciTechDaily.com" (ScitechDaily, Korean Scientists Develop Super Metal That Remains Strong No Matter the Temperature)

The Korean researchers created a new metal that keeps its strength and ductility from -196C to 600 Celsius. That metal can give new tools for aeronautics. And some other technologies. 

That new metal can have potential in some gas tanks. Or in some sensors. When the temperature rises higher level than 600 degrees that metal can melt and then let air travel to the sensor. The metal is called a nickel-based high-entropy alloy HEA. The HEA itself is a pilot material that can used in systems that warn the layer overheating. The idea is the same as the wood metal in sprinkler systems. 

The wood's metal melts at 71C. And that metal is used to close sprinkler ventilation. When a fire starts to burn temperature melts the metal and allows the water to go to the flame. 

The 600C melting  HEA metal can burn or melt away from the layer. 

That opens the sensor to the outer air. And the system can begin counteractions against overheating. 

The problem is that the new metal alloy cannot keep its abilities. If there is liquid hydrogen whose temperature is -253C. The liquid hydrogen requires a new tank solution. 

And one possible solution is the so-called thermos solution. The tank would have one or more vacuum layers between the liquid hydrogen and outside it. New nanotechnical and quantum materials are the tools that make the dream of a new type of airplane or so-called space planes real. The problem is that the temperature outside the aircraft changes from melting heat to freezing cold. 

Another possible solution for the high-speed flight's temperature problem can be the active freezer. The active freezer allows the ram-air or freezing cold gas from the tank to travel below the layer. That liquid, very cold gas can pull thermal energy in it. That liquid gas can be stored in the tank. 

https://scitechdaily.com/korean-scientists-develop-super-metal-that-remains-strong-no-matter-the-temperature/

https://en.wikipedia.org/wiki/Wood%27s_metal