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Proceedings Paper

A novel TiNiNb shape memory alloy with high yield strength and high damping capacity
Author(s): Fu Xiao; Guojun Ma; Xinqing Zhao; Huibin Xu; Haichang Jiang; Lijian Rong
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Paper Abstract

TiNi shape memory alloys exhibit excellent damping capacity in martensite state or during the martensitic transformation. However, the alloys in these situations are very soft (as low as 100 MPa) due to the reorientation of martensite variants or detwinning in the deformation process. In the present paper, we report NiTiNb shape memory alloys with high yield strength (287 MPa) and high damping capacity (Q-1 greater than 10-2). The NiTiNb alloys are characterized by a composite feature in microstructure, i.e. isolated martensitic NiTi(Nb) islands were randomly distributed in the eutectics of B2-TiNi(Nb) and β-Nb. The isolated NiTi(Nb) phase provides excellent damping capacity and the eutectics contribute to high yield strength. The influence of Nb addition on the microstructure, phase transformation temperature, damping capacity and the mechanical properties of the TiNiNb alloys were reported.

Paper Details

Date Published: 1 November 2007
PDF: 6 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64232L (1 November 2007); doi: 10.1117/12.779884
Show Author Affiliations
Fu Xiao, Beijing Univ. of Aeronautics and Astronautics (China)
Guojun Ma, Beijing Univ. of Aeronautics and Astronautics (China)
Xinqing Zhao, Beijing Univ. of Aeronautics and Astronautics (China)
Huibin Xu, Beijing Univ. of Aeronautics and Astronautics (China)
Haichang Jiang, Institute of Metal Research (China)
Lijian Rong, Institute of Metal Research (China)


Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering

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