A Study on Shape Memory Performance of Cu-Al-Ni-Be Alloy Single Crystal

In this paper, single crystal of CuAlNiBe quaternary shape memory alloy was prepared in a high temperature gradient directional solidification furnace with a selective growing crystallizer. And its shape memory performance characters were systematically compared with other series copper base shape memory alloys. The results show that the single crystal of CuAlNiBe quaternary shape memory alloy has better shape memory properties.

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Influence of Be and Ni to Cu-Al Alloy Shape Memory Performance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.1258 ◽

2011 ◽

Vol 197-198 ◽

pp. 1258-1262 ◽

Cited By ~ 2

Author(s):

Hua Ping Xu ◽

Gao Feng Song ◽

Xie Min Mao

Keyword(s):

Shape Memory Alloy ◽

Single Crystal ◽

Shape Memory ◽

Directional Solidification ◽

Ternary Alloy ◽

Memory Performance ◽

Al Alloy ◽

Strengthening Effect ◽

Shape Memory Properties

With Bridgeman directional solidification method the single crystal alloys of CuAl base shape memory alloy (SMA) with different components were prepared. And their shape memory performance characters were systematically investigated. The results show that the single crystal of CuAlNiBe quaternary shape memory alloy has much better shape memory properties than that of the CuAlBe and CuAlNi ternary alloy. That meant that in the CuAl base SMA alloy the mixed addition of Be and Ni changed the quenching microstructure has a strengthening effect to improve the shape memory performance of the SMA alloy.

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Behavior and Preparation of Single Crystal of Cu-Al-Ni-Be SMA

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.1463 ◽

2007 ◽

Vol 561-565 ◽

pp. 1463-1466

Author(s):

Hua Ping Xu ◽

Hui Hu ◽

Gao Feng Song ◽

Chong He Li ◽

Xie Min Mao

Keyword(s):

High Temperature ◽

Grain Boundary ◽

Single Crystal ◽

Shape Memory ◽

Polycrystalline Material ◽

Fatigue Properties ◽

Shape Memory Properties ◽

The Difference ◽

Solidification Furnace ◽

Better Than

In this paper, single crystal of CuAlNiBe shape memory alloy (SMA) was prepared in a high temperature gradient directional solidification furnace with a selective growing crystallizer. And its performance characters were systematically studied. The results show that the mechanical and shape memory properties of the single crystal of CuAlNiBe SMA alloy has much better than that of the polycrystalline material. This may be explained that the stress concentration at grain boundary caused by the difference of bilateral strains is the dominant reason of deterioration of fatigue properties; therefore single crystal alloy possesses the excellent properties duo to its elimination of grain boundary.

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Mechanical and shape memory properties of Ni54Mn25Ga21 high-temperature shape memory alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2006.02.163 ◽

2006 ◽

Vol 438-440 ◽

pp. 978-981 ◽

Cited By ~ 21

Author(s):

Yan Li ◽

Yan Xin ◽

Chengbao Jiang ◽

Huibin Xu

Keyword(s):

High Temperature ◽

Shape Memory Alloy ◽

Shape Memory ◽

Shape Memory Properties

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Effect of the Addition of Gd on Ni53Mn22Co6Ga19 High-Temperature Shape Memory Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.2095 ◽

2010 ◽

Vol 654-656 ◽

pp. 2095-2098

Author(s):

Yun Qing Ma ◽

Shui Yuan Yang ◽

San Li Lai ◽

Shi Wen Tian ◽

Cui Ping Wang ◽

...

Keyword(s):

Grain Size ◽

High Temperature ◽

Martensitic Transformation ◽

Shape Memory Alloy ◽

Shape Memory ◽

Earth Element ◽

Stress And Strain ◽

Martensitic Transformation Temperature ◽

Rich Phase ◽

Shape Memory Properties

The rare earth element Gd is added to Ni53Mn22Co6Ga19 high-temperature shape memory alloy to refine the grain size and adjust the distribution of γ phase, and their microstructure, martensitic transformation behaviors, mechanical and shape memory properties were investigated. The results show that the grain size is obviously decreased and the γ phase tends to segregate at grain boundaries with increasing Gd content. Small amounts of Gd-rich phase were formed with 0.1 at.% Gd addition. The martensitic transformation temperature abruptly increases with 0.1 at.% Gd addition, then almost keeps constant with further increasing Gd content. The addition of 0.1 at.% Gd is proved to be beneficial to both tensile stress and strain before fracture, but negative to the shape-memory effect.

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