Explanation

Also known as anti vibration alloy. alloy with high attenuation of self vibration. Use the attenuation energy of alloy itself, that is, various corresponding damping mechanisms inside materials to absorb mechanical vibration energy and convert vibration energy into thermal energy dissipation, so as to achieve the effect of vibration reduction and noise reduction. It can be divided into composite type, strong magnetic type, dislocation type, twin type, etc. ① The composite type includes Fe-C-Si, Al Zn, Al-40Zn, A1-78Zn, ZDAl high, lamellar graphite cast iron, etc. The second phase precipitates in the strong and tough matrix, and plastic flow or viscous flow easily occurs at the phase interface. External vibration or sound waves can be consumed in these flows, and the sound is absorbed; ② The strong magnetic type includes alloy such as FeCr, Fe Cr Al, Fc Cr Mo, etc. Under the action of alternating stress, the magnetic wall absorbs energy by vibration; ③ dislocation type includes KIKI magnesium alloy, which dissipates the vibration kinetic energy due to the interaction of dislocation; ④ The twin forms are Mn Cu, Mn Cu Al, Ni Ti and other alloy, which absorb vibration energy due to the mobility of twin boundaries and the relaxation process. Widely used in precision instruments such as control panels or navigators for rockets, missiles, jet aircraft, car bodies, engine rotating parts, rock cutters, percussion machines, wheels, rails, ship propellers, etc.

Classification