Porous Ni–Ti–Nb Shape Memory Alloys with Tunable Damping Performance Controlled by Martensitic Transformation

  • Shanshan CaoEmail author
  • Yuan-Yuan Li
  • Cai-You Zeng
  • Xin-Ping ZhangEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Porous Ni–Ti–Nb shape memory alloys (SMAs) with designed porosities and compositions were prepared by the powder metallurgy technique. The phase-transformation-controlled damping behavior of the porous alloys was investigated by dynamic mechanical analysis (DMA). Systematic microstructural study indicates that both the pore configuration and Nb distribution in the matrix of porous Ni–Ti–Nb alloys have significant influence on the damping performance of the alloys. Increase in both pore size and porosity in micro-scale leads to obvious decrease of the internal friction, while addition of Nb brings dramatic increase in the damping capacity of the porous alloys. The damping capacity can be optimized by adjusting the Nb/NiTi ratio, which balances the competitive contribution of Nb/matrix and B2/B19′ interfaces to the internal friction during martensitic transformation. Moreover, β-Nb phase of lamellar structure in the matrix plays a greater role in the internal friction than that of granular shape by offering a large amount of interfaces.


Porous Ni–Ti–Nb alloy Martensitic transformation Damping capacity 



This research was supported by the National Natural Science Foundation of China under Grant Nos. 51401081 and 51571092, and Key Project Program of Guangdong Provincial Natural Science Foundation under Grant No. S2013020012805.


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© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringSouth China University of TechnologyGuangzhouChina

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