scholarly journals Influence of Layer Thickness, Raster Angle, Deformation Temperature and Recovery Temperature on the Shape-Memory Effect of 3D-Printed Polylactic Acid Samples

Materials ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. 970 ◽  
Author(s):  
Wenzheng Wu ◽  
Wenli Ye ◽  
Zichao Wu ◽  
Peng Geng ◽  
Yulei Wang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Layer Thickness ◽  
Polylactic Acid ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Deformation Temperature ◽  
Raster Angle ◽  
3D Printed ◽  
Recovery Temperature

scholarly journals Triple-shape memory effect in 3D-printed polymers

2020 ◽  
Vol 14 (12) ◽  
pp. 1116-1126
Author(s):  
L. Dai ◽  
J. Song ◽  
S. Qu ◽  
R. Xiao
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
3D Printed ◽  
Triple Shape Memory

Mechanical properties and shape memory effect of 3D-printed PLA-based porous scaffolds

2016 ◽  
Vol 57 ◽  
pp. 139-148 ◽  
Author(s):  
F.S. Senatov ◽  
K.V. Niaza ◽  
M.Yu. Zadorozhnyy ◽  
A.V. Maksimkin ◽  
S.D. Kaloshkin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Porous Scaffolds ◽  
3D Printed

Influence of Ultrasonic Treatment on Shape Memory Effects in Ti-50,4at.%Ni Alloy

2013 ◽  
Vol 738-739 ◽  
pp. 362-366 ◽  
Author(s):  
Vasili V. Rubanik ◽  
Vasili V. Rubanik Jr. ◽  
Vyacheslav Dorodeiko ◽  
Svetlana Miliukina
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ultrasonic Treatment ◽  
Tini Alloy ◽  
Ni Alloy ◽  
Shape Memory Effects ◽  
Ultrasonic Influence ◽  
Reverse Martensite Transformation ◽  
Recovery Temperature

In the present study we investigate the effect of ultrasonic treatment on the functional properties of Ti 50,4at.%Ni alloy after the processing in free and pre-deformed conditions. It is shown that the shape memory effect and its realization peculiarities depend on the parameters and conditions of ultrasonic influence. Ultrasonic treatment of preliminary deformed TiNi alloy in pre-deforming conditions promotes the reduction of strain restoring at the subsequent heating through the temperature interval of reverse martensite transformation. I. e. some setting of induced strain occurs during the ultrasonic treatment of material in pre-deforming conditions. In the specimens after ultrasonic treatment, it is observed the extension of shape recovery temperature range in the first thermal cycle, as well as the dependence of strain recovery temperature dynamics on the power of ultrasonic influence. Also it is established that ultrasonic treatment helps to increase the shape memory effect.

scholarly journals Radial Compressive Property and the Proof-of-Concept Study for Realizing Self-expansion of 3D Printing Polylactic Acid Vascular Stents with Negative Poisson’s Ratio Structure

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1357 ◽  
Author(s):  
Zichao Wu ◽  
Ji Zhao ◽  
Wenzheng Wu ◽  
Peipei Wang ◽  
Bofan Wang ◽  
...  
Keyword(s):  
3D Printing ◽  
Polylactic Acid ◽  
Deformation Temperature ◽  
Compressive Property ◽  
Recovery Ratio ◽  
Vascular Stent ◽  
Vascular Stents ◽  
3D Printed ◽  
Stent Diameter ◽  
Recovery Temperature

Biodegradable stents offer the potential to reduce the in-stent restenosis by providing support long enough for the vessel to heal. The polylactic acid (PLA) vascular stents with negative Poisson’s ratio (NPR) structure were manufactured by fused deposition modeling (FDM) 3D printing in this study. The effects of stent diameter, wall thickness and geometric parameters of arrowhead NPR structure on radial compressive property of 3D-printed PLA vascular stent were studied. The results showed that the decrease of stent diameter, the increase of wall thickness and the increase of the surface coverage could enhance the radial force (per unit length) of PLA stent. The radial and longitudinal size of PLA stent with NPR structure decreased simultaneously when the stent was crimped under deformation temperature. The PLA stent could expand in both radial and longitudinal direction under recovery temperature. When the deformation temperature and recovery temperature were both 65 °C, the diameter recovery ratio of stent was more than 95% and the maximum could reach 98%. The length recovery ratio was above 97%. This indicated the feasibility of utilizing the shape memory effect (SME) of PLA to realize the expansion of 3D-printed PLA vascular stent under temperature excitation.

Shape memory effect in 3D-printed scaffolds for self-fitting implants

2017 ◽  
Vol 93 ◽  
pp. 222-231 ◽  
Author(s):  
F.S. Senatov ◽  
M.Yu. Zadorozhnyy ◽  
K.V. Niaza ◽  
V.V. Medvedev ◽  
S.D. Kaloshkin ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
3D Printed

Tensile Failure of 55-Nitinol Wire

1975 ◽  
Vol 33 ◽  
pp. 46-47
Author(s):  
F. I. Grace
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Stoichiometric Composition ◽  
Tensile Failure ◽  
Initial State ◽  
Initial Shape ◽  
Nitinol Wire ◽  
Cscl Type ◽  
Shear Transformation

An interest in NiTi alloys with near stoichiometric composition (55 NiTi) has intensified since they were found to exhibit a unique mechanical shape memory effect at the Naval Ordnance Laboratory some twelve years ago (thus refered to as NITINOL alloys). Since then, the microstructural mechanisms associated with the shape memory effect have been investigated and several interesting engineering applications have appeared.The shape memory effect implies that the alloy deformed from an initial shape will spontaneously return to that initial state upon heating. This behavior is reported to be related to a diffusionless shear transformation which takes place between similar but slightly different CsCl type structures.

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