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

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.21 ◽

2011 ◽

Vol 287-290 ◽

pp. 21-25

Author(s):

Hua Ping Xu ◽

Gao Feng Song ◽

Xie Min Mao

Keyword(s):

High Temperature ◽

Temperature Gradient ◽

Shape Memory Alloy ◽

Single Crystal ◽

Shape Memory ◽

Directional Solidification ◽

Memory Performance ◽

Copper Base ◽

Shape Memory Properties ◽

Solidification Furnace

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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Rapidly directional solidification of highly undercooled Ni–Fe–Ga shape memory alloy melts

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2011.06.023 ◽

2011 ◽

Vol 509 (33) ◽

pp. 8333-8336 ◽

Cited By ~ 3

Author(s):

Hongxing Zheng ◽

Sichuang Xue ◽

Dianzhen Wu ◽

Qijie Zhai

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Directional Solidification

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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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Dynamic Behavior of Two Types of Martensitic Transformations in Cu-Al-Ni Shape Memory Alloy Single Crystal by Acoustic Emission Method

Advanced Materials Research - Acoustic Emission Testing ◽

10.4028/0-87849-420-0.305 ◽

2006 ◽

pp. 305-312

Author(s):

Kenichi Yoshida ◽

T. Yasuda ◽

D. Tani ◽

H. Nishino

Keyword(s):

Acoustic Emission ◽

Shape Memory Alloy ◽

Single Crystal ◽

Shape Memory ◽

Dynamic Behavior ◽

Martensitic Transformations ◽

Alloy Single Crystal ◽

Acoustic Emission Method ◽

Emission Method

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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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