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Amorphous Alloys in Robotic and Aerospace Applications

Amorphous Alloys in Robotics

Conventional materials used both for highly complex, technically feasible kinetics and for implementing simple but highly stressed mechanical concepts are reaching their limits in many areas of today's high-tech applications due to their limited mechanical properties. Enabled by their exceptional combination of high strength (1.6 GPa tensile strength) and high elasticity (up to 2%), many of these problems can already be solved today by amorphous alloys. Elastic machine elements in particular benefit from the property portfolio of amorphous metals. Bending joints and hinges, gripper units or spring components can be used efficiently and assembled with a long component life due to the fatigue strength (in the range of 400 MPa at 1 billion cycles and 25 Hz) and wear resistance of amorphous alloys.

Advantages of Amorphous Metals:

  • Elasticity: Durability, functional performance enlargement
  • Abrasion resistance: Lubrication free and longterm performance
  • Durability: Good fatigue strength and creep resistance
  • Miniaturization and design improvements: 3D-Printing or injection molding within tight tolerances and reproducible manufacturing



  • Gears
  • Gripper elements
  • Machine elements
  • Spring components
3D printed flexures and compliant systems made of amorphous alloys

Amophous Alloys in Aerospace

Key requirements for components in the aerospace industry are not only weight savings and high stability, but also the ability to withstand cyclic loads in extreme environmental conditions. Amorphous metals are characterized by their high strength (> 2GPa bending strength) and the resulting freedom in geometric design (thinner or smaller component dimensions) as well as high corrosion resistance compared to commonly used titanium alloys or stainless steels. In addition, components made of amorphous metals are low-temperature ductile and exhibit good fatigue strength values (in the range of 400 MPa at 1 billion cycles and 25 Hz) making them particularly suitable for use in space applications.

Advantages of Amorphous Metals:

  • Resilience: Wear resistance in extreme environments and low temperature ductility
  • Corrosion resistance: as manufactured without coatings and postprocessing
  • Lightweight constructions: Design possibilities, complex geometries, tight tolerances, miniaturization
  • Reliability: Fatigue strength, low hysteresis, high elasticity


  • Bearing housings and supports
  • Drilling heads and tools
  • Engine mounts and discs
  • Impeller, rotor and blade components
  • Joints, gears, hinges and shafts
  • Propulsion and engine applications
  • Seals and flaps
  • Spring and damping elements
Aerospace component made of amorphous alloys by HTR
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HTR tests on a large wheel made from amorphous 3D-printed springs