Preparation of single crystal CuAlNiBe SMA and its performances

被引：16

作者：

Zhu, Ming ^{[1
,2
]}

Ye, Xiaosu ^{[1
]}

Li, Chonghe ^{[1
]}

Song, Gaofeng ^{[1
]}

Zhai, Qijie ^{[1
]}

机构：

[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China

[2] Nonferrous Met Proc Ctr, Gen Res Inst NonFerrous Met, Beijing 100088, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 478卷 / 1-2期

关键词：

CuAlNiBe; Shape memory alloy; Unidirectional solidification; Single crystal; Mechanical property; SHAPE-MEMORY ALLOYS; BETA-PHASE; BEHAVIOR;

D O I：

10.1016/j.jallcom.2008.11.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 M-s, M-f, A(s) and A(f)) 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. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：404 / 410

页数：7

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