the material is the machine

The shape memory effect

A shape memory alloy can be deformed in a cold state and automatically returns to its "shape memory" state when heated

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One material with two faces
Animation
  • Martensite (low temperature phase)

    In the cold state, the shape memory alloy can easily be deformed by yielding to the forces acting on it (e.g. a weight).

  • Martensite (low temperature phase)

    In the cold state, the shape memory alloy can easily be deformed by yielding to the forces acting on it (e.g. a weight).

  • Martensite (low temperature phase)

    In the cold state, the shape memory alloy can easily be deformed by yielding to the forces acting on it (e.g. a weight).

  • phase transition

    With increasing temperature of the shape memory alloy, the microstructure of the material transforms into austenite and assumes its "shape memory".

  • phase transition

    With increasing temperature of the shape memory alloy, the microstructure of the material transforms into austenite and assumes its "shape memory".

  • phase transition

    With increasing temperature of the shape memory alloy, the microstructure of the material transforms into austenite and assumes its "shape memory".

  • Austenite (high temperature phase)

    If a certain temperature is exceeded, the shape memory alloy unfolds its full force. In this high-temperature phase, the material remembers an external shape exactly.

  • Austenite (high temperature phase)

    If a certain temperature is exceeded, the shape memory alloy unfolds its full force. In this high-temperature phase, the material remembers an external shape exactly.

  • Austenite (high temperature phase)

    If a certain temperature is exceeded, the shape memory alloy unfolds its full force. In this high-temperature phase, the material remembers an external shape exactly.

  • Austenite (high temperature phase)

    If a certain temperature is exceeded, the shape memory alloy unfolds its full force. In this high-temperature phase, the material remembers an external shape exactly.

More function in less space

Actuators are components that perform movement or action in a system or a mechanism. memetis thin-film actuators are made of shape memory alloy (SMA) which is also known as a smart material or a memory metal due to its ability to "memorize" its original shape.

SMAs exist in two different crystal structures at different temperatures and "remember" the earlier shape upon heating even after strong deformation. A shape memory alloy is thus a metallic alloy that can be easily deformed in the cold state, for example by pressure. However, as soon as it is heated, for example by a current pulse, the material returns to its original state - to its "shape memory" structure. This is the so-called shape memory effect

The forces generated in the transition between the two states can be used to control movements in the smallest of spaces. memetis GmbH uses this behavior to produce actuators and actuator systems from thin-film SMA that are ultra-compact and serve a wide range of applications.

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Enable movement in your system with memetis!

Shape memory actuation is memetis' core competence. 

We are happy to assist our customers and other interested parties with any questions they may have.

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