A Quantitative Micro-Deformation Field Study of Shape Memory Alloys by High Sensitivity Moiré

1996 ◽  
Vol 459 ◽  
Author(s):  
Q. P. Sun ◽  
Terry T. Xu ◽  
X. Y. Zhang ◽  
P. Tong
Keyword(s):  
Single Crystal ◽  
Shape Memory ◽  
Deformation Behavior ◽  
Lattice Distortion ◽  
High Sensitivity ◽  
Tensile Specimen ◽  
Deformation Field ◽  
Uniaxial Tensile ◽  
Deformation Features ◽  
Micro Deformation

ABSTRACTQuantitative micro-macro combined experimental research on the deformation field of single crystal CuAINi shape memory alloy (SMA) is performed by using high sensitivity Moiré technique. The study is focused on the micro-macro correspondence of the deformation behavior of single crystal uniaxial tensile specimen during stress induced forward and reverse transformations. The aim of the experiment is to quantitatively relate the macroscopic applied stress with the deformation field in the mesoscale. The large deformation due to the lattice distortion during transformation was first successfully recorded by Moiré interferometry. Some important microstructure-related deformation features of single crystal SMA under uniaxial tension are first reported.

On Deformation of A-M Interface in Single Crystal Shape Memory Alloys and Some Related Issues

1999 ◽  
Vol 121 (1) ◽  
pp. 38-43 ◽  
Author(s):  
Qing-Ping Sun ◽  
Terry Ting Xu ◽  
Xiangyang Zhang
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloys ◽  
Single Crystal ◽  
Shape Memory ◽  
Deformation Field ◽  
Experimental Results ◽  
Crystal Shape ◽  
Invariant Plane ◽  
Experimental Discovery ◽  
Deformation Features

Recent experimental results on the deformation field of single crystal CuNiAl shape memory alloys (SMA) by using Moire´ interference technique are reported and two kinds of austenite-martensite (A-M) interfaces with different deformation features are identified. The experimental discovery questioned the invariant plane hypothesis used in crystallographic theory of martensitic transformation. Some fundamental issues on the property of A-M interface and the related micro- and macro-deformation features are discussed.

Cu-AI based single crystal shape memory actuators and drives

2003 ◽  
Vol 112 ◽  
pp. 1181-1184 ◽  
Author(s):  
I. Vahhi ◽  
S. Pulnev ◽  
A. Priadko
Keyword(s):  
Single Crystal ◽  
Shape Memory ◽  
Crystal Shape ◽  
Shape Memory Actuators

High-Sensitivity Temperature Sensor on the Basis of Single-Crystal Si(111) Implanted from Multiple Directions with P+ and B+ Ions

2020 ◽  
Vol 14 (6) ◽  
pp. 1168-1173
Author(s):  
A. S. Rysbaev ◽  
M. T. Normurodov ◽  
A. M. Rakhimov ◽  
Z. A. Tursunmetova ◽  
A. K. Tashatov
Keyword(s):  
Single Crystal ◽  
Temperature Sensor ◽  
High Sensitivity

scholarly journals Study of the deformation behavior and structure formation of Ti-Zr-Nb shape memory alloy

2021 ◽  
Vol 1008 ◽  
pp. 012042
Author(s):  
V A Sheremetyev ◽  
O Akhmadkulov ◽  
V S Komarov ◽  
A V Korotitsky ◽  
S P Galkin ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Structure Formation ◽  
Deformation Behavior

Study on Constitutive Modeling for Large Deformation Behavior of Polyethylene Considering Strain Rate Effect

2013 ◽  
Author(s):  
Sijia Zhong ◽  
Jianfeng Shi ◽  
Jinyang Zheng
Keyword(s):  
Strain Rate ◽  
Large Deformation ◽  
Constitutive Modeling ◽  
Deformation Behavior ◽  
True Strain ◽  
True Stress ◽  
Uniaxial Tensile ◽  
Pipeline System ◽  
Composite Effect ◽  
Time Deformation

Polyethylene (PE) pipes have been applied in transportation of key energy medium such as natural gas in the past decades. The mechanical property of PE is of great importance for better design and safer application of PE pipeline system. The large deformation behavior is a key character of PE, not only for its significant strain rate sensitivity, but also for localized necking process after yielding. In this paper, a new constitutive modeling method was proposed to charaterize the rate-denpendent large deformation behavior of PE, in which the true stress is regarded as a function of true stain and true strain rate alone. Uniaxial tensile tests of PE were conducted under various cross-head speeds, and a digital camera was used to record the real-time deformation of specimens. By separating the composite effect into respective effect of local true strain and strain rate on the local true stress in the necking region, a phenomenological model for describing the rate-dependent deformation behavior under uniaxial tension was ealstablished. Model results were validated and found in good agreement with experimental data.

Compression of Single-Crystal Micropillars of the Γ Intermetallic Phase in the Fe-Zn System

2014 ◽  
Vol 922 ◽  
pp. 264-269 ◽  
Author(s):  
Masahiro Inomoto ◽  
Norihiko L. Okamoto ◽  
Haruyuki Inui
Keyword(s):  
Single Crystal ◽  
Deformation Behavior ◽  
Room Temperature ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Intermetallic Phase ◽  
Gamma Phase ◽  
Compression Tests ◽  
Slip Direction ◽  
Beam Method

The deformation behavior of the Γ (gamma) phase in the Fe-Zn system has been investigated via room-temperature compression tests of single-crystal micropillar specimens fabricated by the focused ion beam method. Trace analysis of slip lines indicates that {110} slip occurs for the specimens investigated in the present study. Although the slip direction has not been uniquely determined, the slip direction might be <111> in consideration of the crystal structure of the Γ phase (bcc).

Temperature dependence of impact deformation behavior of single crystal Ni based superalloy

2015 ◽  
Vol 31 (15) ◽  
pp. 1860-1866 ◽  
Author(s):  
Y. H. Yang ◽  
J. J. Yu ◽  
X. F. Sun ◽  
T. Jin ◽  
H. R. Guan
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Deformation Behavior ◽  
Impact Deformation

Deformation behavior of shape memory TiNi alloy crystals

1984 ◽  
Vol 18 (4) ◽  
pp. 363-366 ◽  
Author(s):  
T. Saburi ◽  
M. Yoshida ◽  
S. Nenno
Keyword(s):  
Shape Memory ◽  
Deformation Behavior ◽  
Ni Alloy
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