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Article Dans Une Revue Shape Memory and Superelasticity Année : 2022

Damping Capacity of Ti–Nb Shape Memory Alloys Evaluated Through DMA and Single-Impact Tests

Résumé

The present work deals with the study of the damping capacity of b-metastable Ti–(24–26) Nb alloys. In this work, several methods have been used to characterize this damping. The impact tests were carried out using two test benches: high-speed impacts were carried out using a vertical firing pressure gun and low-velocity impacts were studied with a bullet drop test. In addition, an original approach of a dynamic mechanical analysis (DMA) is proposed in order to obtain more in-depth understanding of the relationship between microstructure, deformation mechanisms, and damping capacity. The specimens are studied at different microstructure states: single β, dual-phase β + α″, and martensitic phase. A correlation is established between the evolution of the damping factor as function of the applied strain and the occurrence of the corresponding deformation mechanisms. The stress-in-duced martensite mechanism contributes to the improvement of the damping factor.The highest damping capacity is observed for the dual-phase specimen (β + α″). It is shown that the contribution of both the reorientation martensite variants and stress-induced martensitic transformation lead to a damping capacity higher than a single deformation mechanism one.
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Dates et versions

hal-03851439 , version 1 (14-11-2022)

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Wafa Elmay, Laurent Peltier, X. Gabrion, Régis Kubler, Boris Piotrowski, et al.. Damping Capacity of Ti–Nb Shape Memory Alloys Evaluated Through DMA and Single-Impact Tests. Shape Memory and Superelasticity, 2022, 28 (4), pp.349 - 355. ⟨10.1007/s40830-022-00398-7⟩. ⟨hal-03851439⟩
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