Which type of metals can be used for constructing research motor cases?

Non-ferrous ductile metals are ideal for constructing research motor cases because they offer several advantages that are crucial for high-performance rocketry applications. These metals, such as aluminum and titanium, possess good strength-to-weight ratios, which are essential for minimizing the overall mass of the rocket while maintaining structural integrity under high pressures and temperatures.

Additionally, non-ferrous metals generally exhibit better resistance to corrosion compared to ferrous metals, which can oxidize easily and degrade over time. This characteristic is particularly important in rocketry, where the longevity and reliability of components are vital for safety and performance. The ductility of these metals allows the motor cases to be shaped and formed with precision, ensuring that they meet the specific requirements for combustion and containment during the rocket's operation.

While ferrous metals might be strong, they come with the drawbacks of higher weight and susceptibility to corrosion. Plastic composite materials, while lightweight, may not have the strength or thermal stability needed for the extreme conditions a rocket motor experiences. The option of using any readily available materials lacks the specificity needed for ensuring the safety and performance required in rocket motor case construction. This is why the use of non-ferrous ductile metals is emphasized in the design and fabrication of research motor cases in rocketry.