Metallic materials for mechanical damping capacity applications

7th International Conference on Advanced Concepts in Mechanical Engineering

Crciun, R.C.^1 ; Stanciu, S.^1 ; Cimpoeu, R.^1 ; Ursanu, A.I.^1 ; Manole, V.^1 ; Paraschiv, P.^1 ; Chicet, D.L.^1

Materials Science and Engineering Faculty, Gheorghe Asachi Technical University of Iasi, Iasi, Romania^1

关键词: Chemical method;    Damping capacity;    Grey cast iron;    High damping capacity;    Mechanical damping;    Mechanical energies;    Metallic material;    Transition state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012031/pdf
DOI  :  10.1088/1757-899X/147/1/012031

来源: IOP

【 摘 要 】

Some metallic materials exhibit good damping capacity of mechanical energy into thermal energy. This property along with the others metallic characteristics make this materials interesting for a big number of applications. These materials can be used as bumpers in different applications including automotive field. Beside grey cast iron and shape memory alloys few new metallic materials are presented for the supposition of high damping capacity. We analyze the causes that increase the internal friction of some metallic materials and possibilities to enhance this property through different mechanical, physical or chemical methods. Shape memory alloys, especially those based on copper, present a different damping capacity on martensite, austenite or transition state. In the transformation range M ↔A, which in case of copper base shape memory alloys is quite large, the metallic intelligent materials present a high internal friction, almost comparable with natural rubber behavior that can transform mechanical energy into thermal energy till a certain value of the external solicitation. These materials can be used as noise or small vibrations bumpers or even as shock absorbers in automotive industry.