Formation of Anisotropic Mechanical Properties on The Metal Surface by Laser Radiation

Duration of the project

01.06.2020. - 15.11.2020.

Countries and institutions involved in the project

Institute of Silicate Materials, Riga Technical University
University of Stuttgart
Vytautas Magnus University

Project Manager Liga Grase

Project goals

The aim of the project is to develop laser technology to obtain the metal surface with controlled anisotropic mechanical properties. To achieve this aim, the steel surface will be irradiated using different laser beam parameters, including wavelength, intensity, pulse duration, dose and characterized by different investigation methods.

The laser is an important tool in the processing of metals and implies drilling, welding, annealing, cleaning and hardening of a metal surface and other applications. The hardening of a metal surface by laser irradiation is known since 1973 and has been typically used in manufacturing with broad applications, such as bearing, metallic components, etc. The process is typically used on ferrous metals suitable for hardening, including steels and cast iron with carbon. Meanwhile, a preliminary study of the project research group has shown that it is possible to form a submicron-structured surface of steel with surface wettability angle anisotropy. This effect was explained by the formation of laser-induced periodic surface structures (LIPSS) on the surface of steel using powerful pulsed Nd:YAG laser. The LIPSS can be used to control surface tribological properties and wettability.

Main activities and venues

  1. Cylindric shape samples will be ordered (RTU, VMU) and prepared using metal surface polishing and cutting (RTU).
  2. The metal samples will be irradiated with different laser parameters (wavelength, intensity, dose, pulse duration, etc.) and LIPSS on the surface of steel samples will be formed (RTU).
  3. Characterization of the surface of samples by AFM, HRSEM will be carried out in UST.
  4. Mechanical properties will be studied by partners from VMU using Micro Scratch and microhardness tester (CSM), Tribotester TRM 500, Wear machine SMC-2.
  5. Wetting properties will be studied (RTU).

Public events

  1. Workshop, October 2020. University of Stuttgart, L. Grase, J. Padgurskas, A. Zunda. Available for the students and general public interested in the topic.
  2. 61th International Scientific Conference of RTU, October 2020, Riga Technical University, L. Grase, J. Padgurskas, A. Zunda. Available for the students and companies participating in the conference.

Direct and indirect target groups

The direct target group of the project will disseminate the obtained results, presenting them at the conference and in a scientific seminar of Riga Technical University, as well as publishing a scientific paper in journals with high enough impact factor, which are cited in SpringerLink, SCOPUS, DBLP or Thomson Reuters (ISI WEB of Knowledge) databases. The number of persons involved in the direct target group is 9.

The indirect target group of the project will get the information about the obtained scientific results, by participating in the seminar, as well as from the published scientific paper in one of the above-mentioned databases. In this way, access to the project results will be ensured for the indirect target group. These results will be used in the education process as a complement to recent achievements in science, as well as in the development of new directions of manufacturing. The number of persons involved in the indirect target group is more than 50 (including participants at the conference).