Effect of Sm Doping on the Microstructure, Mechanical Properties and Shape Memory Effect of Cu-13.0Al-4.0Ni Alloy

The effects of rare earth element Sm on the microstructure, mechanical properties, and shape memory effect of the high temperature shape memory alloy, Cu-13.0Al-4.0Ni-xSm (x = 0, 0.2 and 0.5) (wt.%), are studied in this work. The results show that the Sm addition reduces the grain size of the Cu-13.0Al-4.0Ni alloy from millimeters to hundreds of microns. The microstructure of the Cu-13.0Al-4.0Ni-xSm alloys are composed of 18R and a face-centered cubic Sm-rich phase at room temperature. In addition, because the addition of the Sm element enhances the fine-grain strengthening effect, the mechanical properties and the shape memory effect of the Cu-13.0Al-4.0Ni alloy were greatly improved. When x = 0.5, the compressive fracture stress and the compressive fracture strain increased from 580 MPa, 10.5% to 1021 MPa, 14.8%, respectively. When the pre-strain is 10%, a reversible strain of 6.3% can be obtained for the Cu-13.0Al-4.0Ni-0.2Sm alloy.

[1]  C. Man,et al.  Effect of Nd addition on the microstructure, mechanical properties, shape memory effect and corrosion behaviour of Cu–Al–Ni high-temperature shape memory alloys , 2020 .

[2]  Xu Li,et al.  Effect of Gradient Heat Treatment on Microstructure and Properties of Cu–Al–Mn Shape Memory Alloy , 2019, Materials.

[3]  T. Cui,et al.  The enhancement of the mechanical properties and the shape memory effect for the Cu-13.0Al-4.0Ni alloy by boron addition , 2019, Journal of Alloys and Compounds.

[4]  C. Chua,et al.  Effect of Heat Treatment on Repetitively Scanned SLM NiTi Shape Memory Alloy , 2018, Materials.

[5]  A. Agrawal,et al.  Methods of fabricating Cu-Al-Ni shape memory alloys , 2018, Journal of Alloys and Compounds.

[6]  Qing-suo Liu,et al.  Cu-Al-Ni-V high-temperature shape memory alloys , 2018 .

[7]  M. Abbass,et al.  Computer Approach of Effect of 0.3 % of Ge, Te and Ce Additions on Thermodynamic Properties and Shape Memory Effect of Cu-14%Al-4.5%Ni Shape Memory Alloys , 2018 .

[8]  J. van Humbeeck,et al.  On the Effect of Hydrogen on the Low-Temperature Elastic and Anelastic Properties of Ni-Ti-Based Alloys , 2017, Materials.

[9]  M. Abbass,et al.  The effect of Germanium addition on mechanical properties& microstructure of Cu-Al-Ni shape memory alloy , 2017 .

[10]  W. Cai,et al.  Effects of Gd addition on the microstructure, mechanical properties and shape memory effect of polycrystalline Cu-Al-Ni shape memory alloy , 2016 .

[11]  Yan Feng,et al.  Microstructure, mechanical properties and shape memory effect of Ni–Mn–Ga–B high-temperature shape memory alloy , 2016 .

[12]  E. Hamzah,et al.  Effect of Quarterly Element Addition of Cobalt on Phase Transformation Characteristics of Cu-Al-Ni Shape Memory Alloys , 2015, Metallurgical and Materials Transactions A.

[13]  H. Bakhsheshi‐Rad,et al.  Correlation of microstructural and corrosion characteristics of quaternary shape memory alloys Cu–Al–Ni–X (X=Mn or Ti) , 2015 .

[14]  H. Bakhsheshi‐Rad,et al.  Influence of Silver nanoparticles addition on the phase transformation, mechanical properties and corrosion behaviour of Cu–Al–Ni shape memory alloys , 2014 .

[15]  Martin Leary,et al.  A review of shape memory alloy research, applications and opportunities , 2014 .

[16]  S. Sangal,et al.  Application of rapid solidification powder metallurgy processing to prepare Cu–Al–Ni high temperature shape memory alloy strips with high strength and high ductility , 2013 .

[17]  J. Humbeeck.  Shape memory alloys with high transformation temperatures , 2012 .

[18]  U. Sarı.  Influences of 2.5wt% Mn addition on the microstructure and mechanical properties of Cu-Al-Ni shape memory alloys , 2010 .

[19]  Q. Zhai,et al.  Preparation of single crystal CuAlNiBe SMA and its performances , 2009 .

[20]  T. Kirindi,et al.  Effects of deformation on microstructure and mechanical properties of a Cu–Al–Ni shape memory alloy , 2008 .

[21]  G. Eggeler,et al.  Influence of Ni on martensitic phase transformations in NiTi shape memory alloys , 2007 .

[22]  J. Pérez-Landazábal,et al.  Study of the stability and decomposition process of the β phase in Cu–Al–Ni shape memory alloys , 2006 .

[23]  G. Gonzalez,et al.  The effect of rapid solidification and grain size on the transformation temperatures of Cu–Al–Be melt spun alloys , 2006 .

[24]  J. Van Humbeeck,et al.  High-temperature shape memory alloys: Some recent developments , 2004 .

[25]  J. Van Humbeeck,et al.  Shape Memory Alloys: A Material and a Technology , 2001 .

[26]  Xiaobing Ren,et al.  Martensitic transformations in nonferrous shape memory alloys , 1999 .

[27]  Jan Van Humbeeck,et al.  High Temperature Shape Memory Alloys , 1999 .

[28]  J. Lai,et al.  Microstructure characterization and effect of thermal cycling and ageing on vanadium-doped Cu–Al–Ni–Mn high-temperature shape memory alloy , 1998 .

[29]  G. Zak,et al.  Shape memory effect in cryogenic Cu-Al-Mn alloys , 1996 .

[30]  T. Lipe,et al.  Microstructural influence of Mn additions on thermoelastic and pseudoelastic properties of CuAlNi alloys , 1994 .

[31]  M. Morris.  High temperature properties of ductile CuAlNi shape memory alloys with boron additions , 1992 .

[32]  M. Morris.  Influence of boron additions on ductility and microstructure of shape memory CuAlNi alloys , 1991 .

[33]  C. M. Wayman,et al.  Engineering Aspects of Shape Memory Alloys , 1990 .

[34]  S. Miyazaki,et al.  On the origin of intergranular fracture in β phase shape memory alloys , 1982 .