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Properties of Composite Materials

#1333


Production, Deformation and Mechanical Properties Investigation of Composite Materials

Tech Area / Field

  • MAT-COM/Composites/Materials

Status
8 Project completed

Registration date
27.08.1998

Completion date
14.03.2003

Senior Project Manager
Mitina L M

Leading Institute
MISIS (Steel and Alloys), Russia, Moscow

Supporting institutes

  • NIKIMT (Institute of Assembly Technology), Russia, Moscow

Collaborators

  • Universidad del Pais Vasco, Spain, Bilbao\nUniversité Catholique de Louvain, Belgium, Louvain-la-Neuve\nUniversidad Politecnica de Madrid / Departamento de Ciencia de Materiales, Spain, Madrid

Project summary

Expected Results

Implementation of project will do allow:


a) New technology of production of metal matrix composites.
b) New technologies of processing by pressure (metal forming) of metal matrix composites.
c) Database about influence of processing by pressure on properties of metal matrix composites.
d) Database about influence of radioactive radiation to properties of metal matrix composites.

Result of the project realisation is elaborated new technologies of MMC processing by pressure. It is planning to improve strength characteristics by 10-15 %; and also to lower the cost price of manufacture of different details by 5-10 %. One of the important results will be achievement of strength parameters stability.

Overview

The development of engineering is impossible without improvement and elaboration of new materials with improved properties. Use of composite materials is perspective way for obtaining high level parameters of different details. Concept "composite materials" covers a wide spectrum metal and non-metal materials including Metal Matrix Composites (MMC) [1-3]. MMC consist from a matrix (basis) from metal or alloy, reinforced by special elements. It is possible to use aluminium alloys; copper alloys; magnesium alloys; zinc alloys; titanium alloys; iron and steel; nickel alloys, etc. for matrix.

It is possible to reinforce matrix by long and short fibres, different shape particles. These elements can be non-metal and metal. Non-metal strengthening elements: silicon carbide, aluminium oxide; graphite; titanium carbide, etc. Metal strengthening elements: molybdenum, stainless steel, titanium, tungsten, etc.

MMC had intensive development in 60-70 years, that was caused by need(requirement) for new materials for space engineering. In present time these materials are being used in "earthly" practice as well.

The basic advantages of MMC comparing with unreinforced metal are: improved durability, improved rigidity, improved wear resistance, high strength and stiffness compared to conventional alloys.

However, this class of materials has a few disadvantages, which limit wide MMC application in engineering. It is poor fracture toughness; low plasticity (ductility); the complicated "know-how"; high production cost (for example, the composite material with a metal matrix and with long fibres - filaments strengthening elements can cost from 1000 up to 10000 US dollars for 1 kg; with strengthening elements as short fibres - 100-400 US dollars for 1 kg; with strengthening elements as particles of a powder - 10-30 US dollars for 1 kg).

The most popular MMC is mixture of aluminium alloys with silicon carbide reinforced elements (fibres or particles). Nowadays the great interest is given to research of an aluminium alloys with silicon carbide powder mixture, this material has improved and isotropic properties with non-high cost combination. Modern researches are directed to development of manufacturing methods of this materials class and to investigation of properties and characteristics of MMC under various conditions.

It is impossible to manufacture different details by casting and machining only. That is why it is important to research an opportunity of MMC deformation. It is necessary to find out not only possibility of deformation by different technologies and deformation conditions, but also influence of deformation to properties of a material (mechanical properties, and surface quality after deformation).

The objects of the project:


Development of new methods of production and processing by pressure (metal forming) of metal matrix composites.
Determination of influence of radioactive radiation on properties of metal matrix composites.

The NIKIMT and MISA scientists worked on a theme of metal matrix composites earlier. One scientist from MISA had scholarship in Technical university of Delft (Netherlands). It means that research group has high qualification and we are sure that project will be fulfilled with good results.


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