How Does a Nitinol Spring Work?

What Is a Nitinol Spring?

A nitinol spring is a smart metal component made from nickel and titanium alloy. It shows both shape memory and superelastic properties. When the spring bends or compresses, it can return to its original shape after heating or unloading. Because of this unique behavior, many industries use nitinol springs in medical devices, robotics, aerospace parts, and precision instruments.

How Does a Nitinol Spring Work?

A nitinol spring works through a phase transformation inside the alloy structure. At lower temperatures, the material stays in the martensite phase and bends easily. However, when the temperature increases, it changes into the austenite phase and recovers its preset shape. This process allows the nitinol spring to generate force, absorb stress, and maintain excellent flexibility. In addition, nitinol springs offer corrosion resistance, long fatigue life, and reliable performance in small spaces.

References

1.Otsuka, K., & Wayman, C. M. Shape Memory Materials. Cambridge University Press.

2.ASTM F2063 Standard Specification for Wrought Nickel-Titanium Shape Memory Alloys for Medical Devices.