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

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

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

2006 ◽  
Vol 13-14 ◽  
pp. 305-312
Author(s):  
Kenichi Yoshida ◽  
T. Yasuda ◽  
D. Tani ◽  
H. Nishino
Keyword(s):  
Acoustic Emission ◽  
Structural Change ◽  
Shape Memory Alloy ◽  
Single Crystal ◽  
Shape Memory ◽  
Dynamic Behavior ◽  
Rise Time ◽  
Tensile Deformation ◽  
Martensitic Transformations ◽  
Alloy Single Crystal

Dynamic behavior of two types of martensitic transformations during tensile deformation of Cu-Al-Ni shape memory alloy single crystal has been investigated using an acoustic emission waveform analysis. Two kinds of martensitic transformations consist of β1 ⇔ β1′ (structural change of DO3 to 18R) and β1 ⇒ γ1′ (structural change of DO3 to 2H), each of which is called super-elastic and thermo-elastic martensitic transformations, respectively. These two types of martensitic transformations could be obtained during tensile deformation because of different heat treatment. The rise time at the source (the source rise time) in finite elastic solid by the modified Takashima’s method was analyzed using the acoustic emission waveform detected during the martensitic transformation. The mean source rise time to the γ1′ phase was smaller than that to the β1′ phase before yielding and became the same after yielding. The former result means that the nucleation of the γ1′ phase is faster than that of the β1′ phase because of different crystallographic structure. The latter result is that the growth rate of the γ1′ phase is the same as that of the β1′ phase.

Martensite and spin-glass transition of a Cu-Zn-Al-Fe shape memory alloy single crystal

1994 ◽  
Author(s):  
Pyoung-Kil Yoo ◽  
G.-S. Ieen ◽  
Hyo-Yeol Park ◽  
Seok-Kil Han ◽  
Min-Su Jang
Keyword(s):  
Glass Transition ◽  
Shape Memory Alloy ◽  
Single Crystal ◽  
Shape Memory ◽  
Spin Glass ◽  
Alloy Single Crystal ◽  
Spin Glass Transition

scholarly journals In situ, 3D characterization of the deformation mechanics of a superelastic NiTi shape memory alloy single crystal under multiscale constraint

2018 ◽  
Vol 144 ◽  
pp. 748-757 ◽  
Author(s):  
Harshad M. Paranjape ◽  
Partha P. Paul ◽  
Behnam Amin-Ahmadi ◽  
Hemant Sharma ◽  
Darren Dale ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Single Crystal ◽  
Shape Memory ◽  
Alloy Single Crystal ◽  
Niti Shape Memory Alloy ◽  
Deformation Mechanics

Preliminary Investigations of a High Temperature Cu-13.3%Al-4%Ni Shape Memory Alloy Single Crystal

2003 ◽  
Author(s):  
Steve Trigwell ◽  
Ganesh Kumara K. ◽  
Abhijit Bhattacharyya ◽  
Muhammed A. Qidwai
Keyword(s):  
Plastic Deformation ◽  
Shape Memory Alloy ◽  
Single Crystal ◽  
Shape Memory ◽  
Room Temperature ◽  
Alloy Single Crystal ◽  
Stress Strain ◽  
Stress Cycling ◽  
Constitutive Response ◽  
Martensite Reorientation

Preliminary investigations on the constitutive response of a Cu-13.3%Al-4%Ni (wt%) shape memory alloy single crystal with stress-free transformation temperatures around 100 to 150°C are reported. Room temperature stress cycling tests were carried out at very low deformation rates. Reproducible stress/strain curves of up to 9% strain due to detwinning (martensitematensite phase transformations) with no plastic deformation were obtained. The data also indicated that a period of stress cycling is required to stabilize the material before reproducible stress-strain curves are obtained due to martensite reorientation.

Acoustic Emission Avalanches in Martensitic Transitions: New Perspectives for the Problem of Source Location

2011 ◽  
Vol 172-174 ◽  
pp. 144-149 ◽  
Author(s):  
Eduard Vives ◽  
Daniel Enrique Soto Parra ◽  
Antoni Planes ◽  
Lluís Mañosa ◽  
Ricardo Romero ◽  
...  
Keyword(s):  
Finite Element ◽  
Acoustic Emission ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Spatial Resolution ◽  
Finite Element Methods ◽  
Simultaneous Detection ◽  
Martensitic Transformations ◽  
Barkhausen Noise ◽  
Thermally Induced

Different experimental procedures for the location of sources of Acoustic Emission (AE) avalanches during Martensitic Transformations are discussed. A first example corresponds to the 1D location of AE events during stress-induced martensitic transitions in a Cu-Zn-Al shape memory alloy (3.5 cm length). The obtained data allows monitoring of the interface advancement with a spatial resolution of less than 1 mm. Secondly, we discuss two different ideas that have significant potential for improving this resolution in the case of thermally induced transitions in small single crystalline samples (~1 cm): the use of elastodynamic simulations based on finite element methods and the simultaneous detection of AE and Barkhausen noise in ferromagnetic samples.

scholarly journals Abnormal Grain Growth Induced by Cyclic Heat Treatment and Fabrication of Cu-Based Shape Memory Alloy Single Crystal

Materia Japan ◽  
2019 ◽  
Vol 58 (3) ◽  
pp. 137-143
Author(s):  
Toshihiro Omori ◽  
Tomoe Kusama ◽  
Sumio Kise ◽  
Toyonobu Tanaka ◽  
Yoshikazu Araki ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Shape Memory Alloy ◽  
Single Crystal ◽  
Shape Memory ◽  
Grain Growth ◽  
Abnormal Grain Growth ◽  
Alloy Single Crystal ◽  
Cyclic Heat Treatment ◽  
Cyclic Heat
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