Ultrahigh damping capacity achieved by modulating R phase in Ti49.2Ni50.8 shape memory alloy wires. (1st July 2020)

• Record Type: Journal Article
• Authors: Jin, Mingjiang; Song, Yuanwei; Wang, Xiaodong; Chen, Peng; Pang, Guobo; Jin, Xuejun
• Is Part Of: Scripta materialia. Number 183(2020)
• Page Start: 102
• Page End: 106
• Publication Date: 2020-07-01
• Subjects: Shape memory alloy -- Damping capacity -- R phase -- Nanodomain; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.03.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: An ultrahigh damping capacity with internal friction close to 0.35 was detected over a large temperature range of 75 °C (from -40 to 35 °C) in Ti49.2 Ni50.8 shape memory wires by adjusting the B2→R phase transformation through a low-temperature aging treatment. Microstructural analysis showed that the excellent damping performance is attributed to high-density nanodomains in the R phase, which are induced by short-range Ni segregation. These results are expected to further expand capacity for designing damping microstructure. Graphical abstract: Image, graphical abstract