Study of martensitic transformation in TiNiCuNb shape memory alloys using dynamic mechanical analysis. (September 2018)

• Record Type: Journal Article
• Authors: Liu, M.Y.; Qi, W.Y.; Tong, Y.X.; Tian, B.; Chen, F.; Li, L.
• Is Part Of: Vacuum. Volume 155(2018)
• Page Start: 358
• Page End: 360
• Publication Date: 2018-09
• Subjects: Shape-memory alloys -- Martensitic transformation -- Damping behavior -- TiNiCuNb; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2018.06.040
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: In present work, effect of Nb content on martensitic transformation and damping behavior of (Ti50 Ni38 Cu12 )100-x Nbx (x = 0, 5, 10, 15at.%) shape memory alloys was investigated by means of X-ray diffraction, differential scanning calorimetry and dynamic mechanical analysis. As a result, the transformation sequence of TiNiCuNb alloys is found to be B2→B19→B19′ upon cooling. Two different damping peaks are observed, one is related to B2→B19 transformation and the other one is related to the overlapping of twin relaxation-type and B19→B19′ transformation. With increasing Nb content to 15 at.%, the peak value of damping capacity of B2→B19 transformation slightly decreases. Highlights: B2.→B19→B19′transformation are identified in TiNiCuNb alloys. Two different damping peaks are observed. Peak value of damping capacity of B2.→B19 transformation reduces with increasing Nb content.