Laser welding of shape memory alloys for medical applications

2008 ◽  
Author(s):  
Ronny Pfeifer ◽  
Dirk Herzog ◽  
Oliver Meier ◽  
Andreas Ostendorf ◽  
Heinz Haferkamp ◽  
...  
Keyword(s):  
Laser Welding ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Medical Applications

Nd:YAG laser welding of Ti-27 at.% Nb shape memory alloys

2016 ◽  
Vol 60 (6) ◽  
pp. 1133-1139 ◽  
Author(s):  
Abdollah Bahador ◽  
Safaa N. Saud ◽  
E. Hamzah ◽  
T. Abubakar ◽  
Farazila Yusof ◽  
...  
Keyword(s):  
Laser Welding ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Nd:Yag Laser

Recent Developments in High Temperature Shape Memory Alloys

1994 ◽  
Vol 360 ◽  
Author(s):  
Jeno Beyer ◽  
Jan.H. Mulder
Keyword(s):  
High Temperature ◽  
Research And Development ◽  
Shape Memory Alloys ◽  
Time Dependence ◽  
Shape Memory ◽  
Medical Applications ◽  
Space Technology ◽  
Shape Memory Properties ◽  
Recent Developments ◽  
Number Of Cycles

AbstractThe functional properties of Shape Memory Alloys (SMA's) are used succesfully at present in a variety of industrial and medical applications. The use of these materials in smart structures is now emerging in the field of aeronautic/space technology. Many applications require higher operating temperatures than available to date, or higher cooling rates and/or a higher number of cycles. For this purpose the properties and fabricability of commercial alloys as Ni-Ti-(X), Cu-Al-Ni or Cu-Zn-Al are being adjusted and improved. Other feasible alloys are being developed. The research and development is directed towards the control of the stress, strain, temperature and time dependence of shape memory properties for a stable in-service behaviour. In this paper the various approaches taken up in recent years by academic and industrial laboratories for developing high temperature SMA's are reviewed.

scholarly journals SMA Wire Characterization for 3D Steerable Active Devices

2018 ◽  
Author(s):  
Saeed Karimi ◽  
Bardia Konh ◽  
Hashem Ashrafiuon
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Smart Materials ◽  
Loading Condition ◽  
Memory Effects ◽  
Medical Applications ◽  
Temperature Changes ◽  
Active Devices ◽  
Shape Memory Effects ◽  
Biomedical Fields

Shape Memory Alloys (SMAs) are a unique class of smart materials that recover their deformed shapes, caused by a loading condition, through temperature changes [1]. SMAs are employed in a variety of areas including aerospace, automotive, and biomedical fields. Their Pseudoelastic characteristics, shape memory effects, and biocompatibility make them particularly suitable for medical applications.

Laser welding of nickel-titanium (NiTi) shape memory alloys

2021 ◽  
pp. 203-230
Author(s):  
Mehrshad Mehrpouya ◽  
Annamaria Gisario ◽  
Hossein Lavvafi ◽  
Amir Dehghanghadikolaei ◽  
Arash Darafsheh
Keyword(s):  
Laser Welding ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Nickel Titanium ◽  
Niti Shape Memory Alloys

Superelastic Shape Memory Elements Using Intrinsic Sensor Effects

2011 ◽  
Author(s):  
Alexander Czechowicz ◽  
Sven Langbein
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Elastic Deformation ◽  
Elastic Element ◽  
Medical Applications ◽  
Resistance Change ◽  
Ambient Temperatures ◽  
Superelastic Effect ◽  
Elastic Elements ◽  
Elastic Characteristics

The superelastic effect of shape memory alloys (SMA) allows reversible material deformations of up to 8% of an element’s length. Although such SMA elements are commonly used for medical applications, only a few utilizations are used in the field of industrial automation. An often disregarded advantage of superelastic elements is the option to replace a conventional elastic element with a smart element including elastic characteristics as well as a deformation sensor. The resistance change of pseudoplastic and superelastic alloys in dependency of varying ambient temperatures, their characteristics during deformation and concepts for different elastic elements with intrinsic sensor functions are the topics of the paper at hand. Additionally, this paper offers an overview over possible combinations of both alloy types utilized as sensing elements. A demonstrator device, capable of elastic-deformation and sensor-feedback signals is presented at the end of this publication.

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