Two-way shape memory effect of a Ti rich NiTi alloy: experimental measurements and numerical simulations

2007 ◽  
Vol 16 (3) ◽  
pp. 771-778 ◽  
Author(s):  
A Falvo ◽  
F Furgiuele ◽  
C Maletta
Keyword(s):  
Numerical Simulations ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Alloy ◽  
Experimental Measurements

scholarly journals Net-Shape NiTi Shape Memory Alloy by Spark Plasma Sintering Method

2021 ◽  
Vol 11 (4) ◽  
pp. 1802
Author(s):  
Sneha Samal ◽  
Orsolya Molnárová ◽  
Filip Průša ◽  
Jaromír Kopeček ◽  
Luděk Heller ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Spark Plasma Sintering ◽  
Memory Effect ◽  
Niti Alloy ◽  
Niti Shape Memory Alloy ◽  
Good Shape ◽  
Plasma Sintering ◽  
Shape Memory Effects ◽  
Spark Plasma

An analysis of the shape memory effect of a NiTi alloy by using the spark plasma sintering approach has been carried out. Spark plasma sintering of Ti50Ni50 powder (20–63 µm) at a temperature of 900 °C produced specimens showing good shape memory effects. However, the sample showed 2.5% porosity due to a load of 48 MPa. Furthermore, an apparent shape memory effect was recorded and the specimens were characterized by uniformity in chemical composition and shape memory alloys of NiTi showed significant austenite phases with a bending strain recovery of >2.5%.

SHAPE MEMORY INVESTIGATION OF SMART CAMAR LOGO USING NITI ALLOY WIRE

2015 ◽  
Vol 76 (3) ◽  
Author(s):  
Muhammad Safwan Shuhaimi ◽  
Nubailah Abd. Hamid ◽  
Rosliza Razali ◽  
Muhammad Hussain Ismail
Keyword(s):  
Phase Transformation ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Alloy ◽  
Niti Shape Memory Alloy ◽  
Shape Effect ◽  
Niti Wire ◽  
The Wire ◽  
Reversible Phase

This project is investigates of NiTi shape memory alloy for simple smart application. The shape memory effect (SME) is attributed from the reversible phase transformation when subjected to stress and temperature. In this study, a small model of CAMAR logo was designed to mimic the shape memory effect. Three samples of wire were investigated; (i) Austenitic NiTi (ii) Martensitic NiTi and (iii) commercial plain carbon steel. The reversible austenite to martensite transformation of the NiTi wire was investigated by a differential scanning calorimetry (DSC) at temperatures ranging from -50 and 200oC. The wire was shaped into CAMAR logo using a mould and then heated at 500°C for 30 minutes in a high temperature furnace. To observe the shape effect recovery, the wire was straighten and reheated in warm water at different temperatures. Results showed that the austenitic wire exhibited complete shape memory recovery after heated at temperature approximately 35°C and  80°C. For the martensitic wire, complete recovery was only observed when the water temperature was ~ 80°C and no recovery was observed at ~30°C. This recovery effect was significantly influenced by the reversible phase transformation temperatures (PTTs) which attributed from the Austenite finish (Af) temperature.

scholarly journals Martensitic transformation and shape memory effect in NiTi alloy covered by chitosan/silver layer

2015 ◽  
Vol 33 ◽  
pp. 03012
Author(s):  
Tomasz Goryczka ◽  
Anna Kokoszka ◽  
Bożena Łosiewicz ◽  
Mateusz Dulski
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Alloy ◽  
Silver Layer

Shape memory effect in nanocrystalline NiTi alloy processed by high-pressure torsion

2015 ◽  
Vol 626 ◽  
pp. 203-206 ◽  
Author(s):  
Hamed Shahmir ◽  
Mahmoud Nili-Ahmadabadi ◽  
Yi Huang ◽  
Jai Myun Jung ◽  
Hyoung Seop Kim ◽  
...  
Keyword(s):  
High Pressure ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
High Pressure Torsion ◽  
Niti Alloy

Work hardening influencing on shape memory effect of NiTi alloy by varying milling speeds

2019 ◽  
Vol 28 (10) ◽  
pp. 105034 ◽  
Author(s):  
Guijie Wang ◽  
Zhanqiang Liu ◽  
Jintao Niu ◽  
Weimin Huang ◽  
Qingzhong Xu
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Work Hardening ◽  
Niti Alloy

The influence of Ni4Ti3 precipitates orientation on two-way shape memory effect in a Ni-rich NiTi alloy

2009 ◽  
Vol 485 (1-2) ◽  
pp. 320-323 ◽  
Author(s):  
M.S. Shakeri ◽  
J. Khalil-Allafi ◽  
V. Abbasi-Chianeh ◽  
Arash Ghabchi
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Alloy
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