High damping capacity of a binary TiNi shape memory alloy
TiNi shape memory alloys exhibiting high damping capacity are currently expected to be used as structural materials for energy dissipation or vibration control applications. In this paper, the characterization of damping behaviour of a binary TiNi SMA was performed by dynamic mechanical analyzer (DMA) instrument and differential scanning calorimetry (DSC) equipment. Damping tests measuring Tanδ, storage modulus E and loss modulus E of Ti49.2Ni50.8 binary shape memory alloy were investigated at different temperature, using different frequency and strain amplitude. It shows that quenching rate has a significant effect on the damping capacity of TiNi SMA by exhibiting different phase transformation behavior. Internal friction values (Q-1) corresponding to cubic B2 parent phase to rhombohedral R phase transformation, B2-R, and R-B19 monoclinic martensite transformation are as high as 0.177 and 0.078, respectively. The occurrence of R-phase significantly softens the storage modulus and thus promotes the damping capacity of TiNi SMAs.
damping Internal friction Martensitic phase transformation TiNi shape memory alloy
Zhishan Yuan Zhaowei Feng Weidong Miao Jiangbo Wang Jin Zhou Ming Zhu
Grikin Advanced Materials Co., Ltd., General Research Institute for Non-Ferrous Metals,Beijing 10008 Grikin Advanced Materials Co., Ltd., General Research Institute for Non-Ferrous Metals, Beijing 1000
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
485-489
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）