Cu-Al-Ni-V high-temperature shape memory alloys. (January 2018)

• Record Type: Journal Article
• Authors: Zhang, Xin; Liu, Qingsuo
• Is Part Of: Intermetallics. Volume 92(2018:Jan.)
• Page Start: 108
• Page End: 112
• Publication Date: 2018-01
• Subjects: Shape–memory alloys -- Mechanical properties -- Shape–memory effects -- Microstructure; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2017.10.001
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: The effects of vanadium element on the microstructure, mechanical properties and shape memory effect of Cu-13.0Al-4.0Ni- x V ( x = 0.5, 1.0 and 2.0) (wt.%) high-temperature shape memory alloy were investigated systematically. The results show that the Cu-13.0Al-4.0Ni- x V alloys display dual-phase morphology which consists primarily 18R martensite and (Al, Cu, Ni)V3 phase. The grain size is significantly reduced by the addition of vanadium. The mechanical properties of Cu-13.0Al-4.0Ni- x V alloys are also improved due to the grain refinement and solid solution strengthening. When the pre-strain is 10%, the shape memory effect of 5.8% can be obtained for Cu-13.0Al-4.0Ni-0.5 V alloy. Highlights: The influence of V element on Cu- x V-13.0Al-4.0Ni HTSMAs is investigated. The grain is significantly refined, and (Al, Cu, Ni)V3 phase is formed by V addition. The mechanical properties are improved owe to grain refinement and solution strengthening. SME of 5.8% is obtained for Cu-0.5V-13.0Al-4.0Ni under the pre-strain of 10%.