Laser Center of the MEPhI

The Head of the REC Laser Center is Viktor N. Petrovskiy (Ph. D. in Physics and Mathematics, Associate Professor)

Room: K-1105

Phone: +7(495)788-56-99, 9392

Directions in the activities of the Center:

  • Training and up-skilling of under- and postgraduate students in the field of laser technologies;
  • Scientific and research activity in the field of interaction between high-power laser radiation and various materials;
  • Laser technologies and equipment based on fiber lasers performing laser cutting, welding, cladding, heat treatment, etc. for various enterprises of the Russian Federation;
  • Provision of expert, consulting and information services in the field of laser technologies;
  • Developing of new education technologies in application of fiber lasers using computer and telecommunication engineering;
  • Undertaking of career guidance activities involving pupils from various regions of the Russian Federation.

Equipment of the Center:

Facility for laser cutting based on a fiber laser with of a 3kW power and processing field of 3000×1500 nm:

Universal robotic welding cell based on a fiber laser of a 10Kw power:

Five-axis laser facility Huffman-205 based on a fiber laser with of a 3,5 kW power for carrying out research on precision powder laser cladding:

Scientific and educational multifunctional laser technical facility МЛ-4 based on a Nd:YAG laser with programmable pulse form and a pulse fiber laser:

Experimental test rig based on a fiber laser with of a 700 W power:

Multifunctional laser technical facility based on two fiber lasers with a wavelength of 1,07 µm and 0,53 µm, respectively, for research in the field of laser microprocessing:

Precision marking system based on a pulse fiber laser for research in the field of laser marking and engraving:

Multifunctional robotic laser technical facility with laser beam scanning based on a fiber laser of a 5 kW power for carrying out research on how laser radiation thermally affects various materials.

Major research fields of the Laser Center

LASER WELDING 

Due to the wide application of new generation of materials in the various fields of the modern industry, such as transport machine and shipbuilding, automotive, aircraft and space industry, oil and gas industry, it is getting especially important to develop innovative welding and related technologies, as well as equipment needed for them to be released.

Implementation of laser welding technologies allows enhancing the quality of weld-fabricated connections, reducing the heat input, as well as the level of residual stress and deformation of weld-fabricated construction, decreasing the amount of labor needed on the further construction processing and increasing the productivity of welding process.

It is the heating locality and the high processing speed specific to laser welding that provide an opportunity of obtaining weld seams with a minimum heat-affected zone. High speed of heating and cooling of the materials under laser welding makes it possible to obtain equal-strength weld-fabricated connections for both homogeneous and heterogeneous materials.

Possibility of transporting laser radiation via mirrors and optical fiber enables laser welding to be performed in hard-to-reach places.

LASER ARC WELDING

Technology of laser arc welding has certain advantages over both laser welding and traditional welding technology. The availability of an additional heat source makes this technology less sensitive to gaps.

Weld-fabricated connections with the given strength characteristics can be obtained due to the opportunity of additional alloying of a weld through an electrode metal. The interaction between laser radiation and electric arc stabilizes the burning of arc during the high speed processing. The quality of weld matches that made with a laser.

CLADDING AND THERMAL HARDENING

Laser technology of cladding and thermal hardening of functional wear and corrosion layers is important in a wide range of heavy industries, such as engine building, energetics, oil and gas, mining, and other sectors. Due to the low productivity, laser powder cladding is normally used for processing of either small components, or certain parts of large-sized objects.

Due to using of high-power laser radiation, productivity of manufacturing process increases significantly (up to 17 kg/h), whereas coating remains the same quality level that is specific for existing laser technologies of cladding. That allows laser cladding technology to be cost-efficient choice in processing of large-sized objects.

PRECISION LASER CUTTING

There is an urgent need for the development and application of methods of modern construction materials cutting that demonstrate high rates both in the process productivity and in accuracy and quality of cut surface. Laser cutting of metals is one of such prospective processes of materials separating.

Since focused laser radiation provides high energy concentration, it allows separating almost every metal or alloy regardless their thermal-physical properties. At the same time, it is possible to get narrow cuts with a minimum heat-affected zone. The laser cutting does not mechanically affects a processed material, therefore only minimal deformations occur (temporal ones during the process of cutting and permanent ones after the material is completely cooled). Thereby, it is possible to perform laser cutting of high accuracy, including that of easily deformable or non-rigid components. Due to the high power density of laser radiation, both the high process productivity and the high cut quality are obtained.

Contacts

National Research Nuclear University MEPhI

Moscow, Kashirskoe Highway, 31
115409

Laser Center

Phone: +7 (495) 788-56-99, 9392

E-mail: VNPetrovskij@mephi.ru