Deformation Processes at the Surface of a Nickel Alloy Subjected to Nanosecond Laser Pulses

• Published in: Russian metallurgy Metally Vol. 2021; no. 10; pp. 1233 - 1237
• Main Authors: Zheleznov, Yu. A., Malinskii, T. V., Mikolutskii, S. I., Rogalin, V. E., Filin, S. A., Khomich, Yu. V., Yamshchikov, V. A., Kaplunov, I. A., Ivanova, A. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2021; Springer Nature B.V
• Subjects: Advanced Materials and Technologies; Chemistry and Materials Science; Crystallography; Grain boundary sliding; High temperature; Laser beam welding; Lasers; Materials Science; Mechanical tests; Metallic Materials; Neodymium lasers; Nickel alloys; Nickel base alloys; Plastic deformation; Pulse duration; Pulsed radiation; Semiconductor lasers; Superalloys; Surface layers; YAG lasers; laser irradiation; UV radiation; nickel alloy; diffusion welding; surface micro- and nanomodification; plastic deformation
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029521100360

The effects on the surface of a nickel superalloy that are caused by the action of pulsed radiation from an Nd:YAG laser with a wavelength in the ultraviolet range (0.355 μm) and a pulse duration of 10 ns are studied. The surface layer is found to rise in a subthreshold irradiation regime. Traces of high-temperature plastic deformation via grain-boundary sliding and crystallographic slip are detected in the spot zone. The joints of nickel alloy samples with preliminary laser treatment are subjected to diffusion welding and mechanical tests; as a result, a noticeable improvement in the weld quality as compared to untreated samples is shown.