DAMPING CAPACITY AND MECHANICAL PROPERTY OF
NiTiNb SHAPE MEMORY ALLOYS
XIAO Fu1; ZHAO Xinqing1; XU Huibin1;JIANG Haichang2; RONG Lijian2
1 School of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083
2 Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016
Cite this article:
XIAO Fu ZHAO Xinqing XU Huibin JIANG Haichang RONG Lijian. DAMPING CAPACITY AND MECHANICAL PROPERTY OF
NiTiNb SHAPE MEMORY ALLOYS. Acta Metall Sin, 2009, 45(1): 18-24.
Two-phase NiTi base alloys (NiTi)50-0.5xNbx(x=5, 10, 15, 20) with both high damping capacity and high yield strength have been prepared by addition of Nb. With increasing Nb content, the fraction of eutectic (NiTi+β--Nb) increases, and yield strength in martensite state rises. When x=15, the yield strength reaches the highest value of 289 MPa. And the alloys also exhibit high damping capacity, tanδ>0.01. According to the damping mechanism for the shape memory alloys, the relationship between the damping properties and temperatures of NiTiNb alloys was explained, and phase boundary damping from the β-Nb and NiTi phases was discussed.
Supported by National High Technology Research and Development Program of China
(No.2006AA03Z102) and Aviation Science Foundation
of China (No.2006ZF51069)
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