Cu-mn alloy is a widely used damping material and belongs to the field of thermoelastic martensite transformation. This kind of alloy in 300-600 ℃ during aging heat treatment, microstructure is to martensite organization transformation, twin and organizes the unstable is martensite twin, when under vibration stress will be rearranged movement, to absorb a lot of energy, show the damping effect.

Manganese-copper has good piezoresistive effect, which is widely used in pressure measurement in high temperature and high pressure environment such as detonation, high speed impact, dynamic fracture and new material synthesis. The resistance change of manganese copper is approximately linear function relation with the external pressure (i.e. the piezoresistive coefficient K is almost constant), and the resistance temperature coefficient is small. Through the sensor made of manganese copper as the sensitive element, the pressure measurement under the dynamic high pressure can be converted into the measurement of the resistance change of manganese copper.

The characteristics of the high-damping alloy of cu-mn series are as follows: the higher the content of Mn (50% >), the larger the dependent variable; The longer the high temperature aging time, the higher the damping performance. However, each of these trends has a limit, and when the limit is exceeded, the damping performance will decline. In addition, this kind of damping alloy is very sensitive to the operating temperature. When the temperature is Neel point temperature, the atomic magnetic coupling of every two adjacent Mn atoms will be arranged in an order of diamagnetism, forming the diamagnetic domain. When subjected to external motion, the magnetic domain produces motion and generates internal consumption, which is a special damping mechanism of mn-cu alloy. When the temperature exceeds the Neel point, the ordered arrangement of the magnetic domain is damaged, and the damping performance decreases.