English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Samples from VT6 titanium alloy were surface treated with femtosecond laser pulses (τ = 320 fs, λ =1030 nm). Samples were treated both in air and in water. Surface topography, elemental composition, and structural-phase state of the surface-modified layers were studied using scanning electron microscopy and X-ray diffraction analysis. It was found that treatment with a fluence of 1.2 J/cm2 leads to the formation of laser-induced periodic surface structures (LIPSS) on the surface of the VT6 titanium alloy. The period of the structures depends on the number of pulses and the processing medium: from ~1010 nm for 1 pulse in air to ~580 nm for 100 pulses in water. It was found that the surface structure after multi-pulse treatment exhibits superhydrophobic behavior with a contact angle of approximately 150 degrees. It was found that multi-pulse treatment both in air and in water leads to surface oxidation with the formation of TiO and an increase in the content of β-Ti in the near-surface layers.The magnitude of residual stresses of the first kind (macro residual stresses) in the surface layers of VT6 titanium alloy samples after femtosecond laser irradiation was estimated by the methods of X-ray diffraction analysis. The conventional sin2ψ method and the X-ray grazing incidence technique (GIXD-method) were used in this research. It was shown that, after processing with a fluence of 1.2 J/cm2, tensile residual stresses with a maximum magnitude of ~400 MPa are formed in the surface layers (~3 μm) of the samples.

Structural-phase state of near-surface layers of VT6 titanium alloy after femtosecond laser treatment