Abstract
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.
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Funding
This work was supported by the Ministry of Education and Science of the Russian Federation in terms of state assignments no. 0057-2019-0005 and 0817-2020-0007 using the resources of the Center for Collective Use of Tver State University.
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Translated by K. Shakhlevich
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Zheleznov, Y.A., Malinskii, T.V., Mikolutskii, S.I. et al. Deformation Processes at the Surface of a Nickel Alloy Subjected to Nanosecond Laser Pulses. Russ. Metall. 2021, 1233–1237 (2021). https://doi.org/10.1134/S0036029521100360
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DOI: https://doi.org/10.1134/S0036029521100360