Article ID Journal Published Year Pages File Type
1622001 Journal of Alloys and Compounds 2009 7 Pages PDF
Abstract
A novel quaternary CuAlNiBe shape memory alloy (SMA) Cu-11.5Al-3.8Ni-0.4Be (wt%) was designed and synthesized in this study. The single crystal of this alloy was fabricated by means of a high temperature gradient directional solidification furnace with a selective growing crystallizer. After solid solution treatment, the phase transformation points (including Ms, Mf, As and Af) were determined by DSC; the bending shape memory performance, the maximal recoverable deformations, the tensile strength and the elongation percentage were measured. Its maximum recoverable strain reached 10% which approximately equals to or exceeds the reported maximum recoverable strain for polycrystalline TiNi alloy. The number of bend-relaxing times arrived at 750. Both results implied that this single crystal alloy may become a promising candidate to challenge TiNi SMA.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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