Politecnico di Torino - Corso Duca degli Abruzzi, 24 - 10129 Torino, ITALY

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CompositeGiunzione meccanicaJunction of metalMechanical junctionMulti material hybrid structureStruttura ibrida multi materialethermoplastic


The invention is related to a method for the realization of a mechanical junction of materials with different melting temperature of which at least one conductor. The process was designed for the joining of metal thermoplastic and metal composite. The resulting hybrid joints have high mechanical characteristics.

Technical features

The possibility to combine different materials allows to increase the performance of the resulting structure. In this context there is the need to be able to create an effective joint of materials characterized by different mechanical, physical and thermal characteristics. This type of joint is generally made by two types of processes adhesive joints and/or mechanical joints, solutions which, despite being commonly adopted, have disadvantages. For example, the adhesive joints show a high resistance to shear stress, while a low peeling stress Mechanical joints, on the other hand, present different limits and problems that determine the increase in the weight of the structure and the relative costs. A group of researchers from the University of L’Aquila has developed an innovative solution that allows to overcome the limits of the known art, allowing the creation of mechanical joints between two different materials, at least one of which is a conductor with very different melting temperatures.

Possible Applications

  • Realization of hybrid multi material Structures (HS) used in a wide range of applications, in particular:
    • Automotive sector
    • Aeronautical sector
    • Electronic sector
    • Civil sector
    • Biomedical sector


  • High mechanical characteristics;
  • High resistance to mechanical stress and peeling;
  • High productivity and reduced energy requirements;
  • No increase in weight and reduced junction cost.