J. M. San Juan, Universidad del País Vasco, Bilbao, Spain; M. L. No, University of the Basque Country, Leioa, Spain
Shape memory alloys are considered as high damping materials due to their capacity to dissipate mechanical energy during martensitic transformation, or in martensite phase. This property is linked to the mobility of the martensite interfaces under an applied stress. Nevertheless, bulk SMAs do not show enough high damping coefficient in comparison with polymeric materials, and so can hardly compete with them in structural damping applications.
In the present paper we present a new concept of Metal Matrix Composites based on shape memory alloys, which exhibit an extremely high damping coefficient, as high as tan (f) > 0.5. Besides, the maximum of damping can be matched to a particular temperature, according the working conditions required by each particular application.
Shape memory alloys are considered as high damping materials due to their capacity to dissipate mechanical energy during martensitic transformation, or in martensite phase. This property is linked to the mobility of the martensite interfaces under an applied stress. Nevertheless, bulk SMAs do not show enough high damping coefficient in comparison with polymeric materials, and so can hardly compete with them in structural damping applications.
In the present paper we present a new concept of Metal Matrix Composites based on shape memory alloys, which exhibit an extremely high damping coefficient, as high as tan (ƒÖƒwƒn> 0.5. Besides, the maximum of damping can be matched to a particular temperature, according the working conditions required by each particular application.
