Investigation of coatings of austenitic steels produced by supersonic laser deposition

• Published in: Optics and laser technology 2017-02, Vol.88, p.157-165
• Main Authors: Gorunov, A.I., Gilmutdinov, A. Kh
• Format: Article
• Language: English
• Subjects: Adhesive strength; Austenitic stainless steels; Coating; Coatings; Deformation mechanisms; Disruption; Hardness; Implantation; Laser beam heating; Laser deposition; Lasers; Mechanical properties; Melting; Microstructure; Plastic deformation; Roughness; Stainless steel; Strength; Structural steels; Studies; Supersonic laser deposition; Surface roughness; Surface stability; Tensile strength; X ray analysis
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2016.09.012

The structure and properties of stainless austenitic steel coatings obtained by the supersonic laser deposition are studied in the paper. Implantation of the powder particles into the substrate surface and simultaneous plastic deformation at partial melting improved the mechanical properties of the coatings - tensile strength limit was 650MPa and adhesion strength was 105MPa. It was shown that insufficient laser power leads to disruption of the deposition process stability and coating cracking. Surface temperature increase caused by laser heating above 1300°C resulted in coating melting. The X-ray analysis showed that radiation intensifies the cold spray process and does not cause changes in the austenitic base structure. •The maximum tensile strength of the deposited coatings is 650MPa.•The adhesion strength of the coatings is 105MPa.•The structure of the coating is a matrix of deformed powder particles.•In the single areas the structure is not detected by chemical etching.