Modeling of Iron Based Shape Memory Alloys Behavior Within Finite Strain Formulation

2020 ◽  
pp. 385-391
Author(s):  
Achref Sallami ◽  
Walid Khalil ◽  
Tarak Bouraoui ◽  
Tarak Ben Zineb
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Finite Strain ◽  
Strain Formulation ◽  
Iron Based

Experimental behavior of iron-based shape memory alloys under cyclic loading histories

2021 ◽  
Vol 272 ◽  
pp. 121712
Author(s):  
Diego Isidoro Heredia Rosa ◽  
Alexander Hartloper ◽  
Albano de Castro e Sousa ◽  
Dimitrios G. Lignos ◽  
Masoud Motavalli ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Experimental Behavior ◽  
Iron Based

Laser Metal Deposition of Fe- and Co-Based Shape-Memory Alloys

2021 ◽  
Vol 1161 ◽  
pp. 105-112
Author(s):  
Niklas Sommer ◽  
Gabriel Mienert ◽  
Malte Vollmer ◽  
Christian Lauhoff ◽  
Philipp Krooß ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Microstructural Evolution ◽  
Microstructural Analysis ◽  
Metal Deposition ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Wall Structures ◽  
Iron Based ◽  
First Time

In the present study, Iron-based FeMnAlNi and Cobalt-based CoNiGa shape-memory alloys (SMA) were processed by laser metal deposition for the first time. The materials show susceptibility to cracking upon processing when unheated substrates are employed. Pre-heating of the substrate materials eliminated cracking completely and enabled robust deposition of thin-wall structures. Microstructural analysis using optical microscopy revealed different microstructural evolution for the two materials considered.

Iron-based superelastic alloys with near-constant critical stress temperature dependence

Science ◽  
2020 ◽  
Vol 369 (6505) ◽  
pp. 855-858 ◽  
Author(s):  
Ji Xia ◽  
Yuki Noguchi ◽  
Xiao Xu ◽  
Takumi Odaira ◽  
Yuta Kimura ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Temperature Dependence ◽  
Critical Stress ◽  
Outer Space ◽  
Alloy System ◽  
Large Temperature ◽  
Superelastic Behavior ◽  
Iron Based ◽  
Metal Shape

Shape memory alloys recover their original shape after deformation, making them useful for a variety of specialized applications. Superelastic behavior begins at the critical stress, which tends to increase with increasing temperature for metal shape memory alloys. Temperature dependence is a common feature that often restricts the use of metal shape memory alloys in applications. We discovered an iron-based superelastic alloy system in which the critical stress can be optimized. Our Fe-Mn-Al-Cr-Ni alloys have a controllable temperature dependence that goes from positive to negative, depending on the chromium content. This phenomenon includes a temperature-invariant stress dependence. This behavior is highly desirable for a range of outer space–based and other applications that involve large temperature fluctuations.

Iron-based shape memory alloys for civil engineering structures: An overview

2014 ◽  
Vol 63 ◽  
pp. 281-293 ◽  
Author(s):  
A. Cladera ◽  
B. Weber ◽  
C. Leinenbach ◽  
C. Czaderski ◽  
M. Shahverdi ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Civil Engineering ◽  
Engineering Structures ◽  
Iron Based ◽  
Civil Engineering Structures
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