Microstructure of the near-surface layers of austenitic stainless steels irradiated with a low-energy, high-current electron beam

Ротштейн, В. П.; Ivanov, Yu. F.; Proskurovsky, D.I.; Karlik, K. V.; Шулепов, И. А.; Markov, A. B.

doi:10.1016/j.surfcoat.2003.10.089

Cited by 48 publications

(26 citation statements)

References 5 publications

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“…The main reason of cratering is a local overheating and melting of second-phase particles [5,6,27]. In turn, the formation of residual tensile stresses is associated with the high thermal gradients in the surface layers during the cooling [5,6].…”

Section: Titanium Alloysmentioning

confidence: 99%

Surface Modification and Alloying of Aluminum and Titanium Alloys with Low-Energy, High-Current Electron Beams

Ротштейн

Шулов

2011

Journal of Metallurgy

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The paper reviews the results of investigations of surface modification and alloying of Al, Ti, and its alloys with a low-energy (up to ∼40 keV), high-current (up to 25 J/cm 2 ) electron beams of microsecond duration under systematically varied conditions. The microstructural evolution of the surface layers of Al alloys (Al2024 and Al6061) and Ti-6Al-4V alloy subjected to pulsed melting as well as changes in surface-sensitive properties of these alloys are considered. Phase formation and properties of Albased and Ti-based surface alloys, synthesized by liquid-phase mixing of multilayer film-substrate systems in wide range of solid solubility, including [Al/Si]/Al, [Al/C]/Al, [Zr/Ti]/Ti-6Al-4V, and Al/Ti, are studied. In case of Ti-based substrates, this method allows to fabricate the single-phase nanocrystalline α-(TiZr) surface alloy, free of Al and V, as well as nanosized and ultrafine grain TiAl/Ti 3 Al-based surface alloys of thickness ≥3 μm with enhanced mechanical properties.

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Section: Titanium Alloysmentioning

confidence: 99%

Surface Modification and Alloying of Aluminum and Titanium Alloys with Low-Energy, High-Current Electron Beams

Ротштейн

Шулов

2011

Journal of Metallurgy

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“…The HCPEB treatments were conducted under the following conditions: the electron energy 25 keV, the pulse duration 1 μs, the spray distance 80 mm, and the vacuum 5×10 −3 Pa. More details about the HCPEB system can be found in Refs. 22,23 .…”

Section: Methodsmentioning

confidence: 99%

Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam

et al. 2016

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A Cu-10Fe alloy with magnetron sputtered Al films was irradiated by high current pulsed electron beam (HCPEB) with various pulse numbers, next changes of its microstructure and corrosion property were investigated. Compared with the initial sample, microhardness and corrosion resistance of the aluminized Cu-10Fe alloys after the HCPEB treatment are remarkably improved with increasing pulse numbers. This improvement could be attributed to formation of Al 2 Cu intermetallic compounds, occurrence of liquid phase separation and grain refinement in the surface layer of the Cu-10Fe alloy during the process of rapid remelting and solidification induced by the HCPEB treatment.

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“…Before irradiation, the surface of a Сu film has a roughness R a = 0.25-0.35 µm, which corresponds to the roughness of the surface of a substrate multiply irradiated beforehand with an LEHCEB [14]. After single irradiation with E s = 2.8-8.4 J/cm 2 , R a remains almost unchanged, testifying that the topography of the substrate surface before coating deposition plays the dominant part.…”

Section: Topography Of the Surfacementioning

confidence: 95%

“…The local exfoliation of the film and its nonuniform mixing with the substrate on irradiation is related to the formation of microcraters at the filmsubstrate interface. It has been shown [14] that multiple pulsed melting of type 316 stainless steels substantially reduces the probability of cratering due to the removal of undesirable impurities from the surface. In this connection, in all further experiments the substrates were irradiated with an LEHCEB with E s = 8-10 J/cm 2 , N = 30 before deposition of a copper film.…”

Section: Topography Of the Surfacementioning

confidence: 99%

Pulsed electron-beam melting of a copper — steel 316 system: Evolution of the chemical composition, microstructure, and properties

et al. 2005

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The surface topography, chemical composition, microstructure, nanohardness, and tribological characteristics of a Cu (film, 512 nm) -stainless steel 316 (substrate) system subjected to pulsed melting by a low-energy (20-30 keV), high-current electron beam (2-3 µs, 2-10 J/cm 2 ) were investigated. The film was deposited by sputtering a Cu target in the plasma of a microwave discharge in argon. To prevent local exfoliation of the film due to cratering, the substrate was multiply pre-irradiated with 8-10 J/cm 2 . On single irradiation, the bulk of the film survived, and a diffusion layer containing the film and substrate components was formed at the interface. The thickness of this layer was 120-170 nm irrespective of the energy density. The diffusion layer consisted of subgrains of γ-Fe solid solution and nanosized particles of copper. In the surface layer of thickness 0.5-1 µm, which included the copper film quenched from melt and the diffusion layer, the nanohardness and the wear resistance nonmonotonicly varied with energy density, reaching, respectively, a maximum and a minimum in the range 4.3-6.3 J/cm 2 . As the number of pulsed melting cycles was increased to five in the same energy density range, there occurred mixing of the film-substrate system and a surface layer of thickness ~2 µm was formed which contained ~20 at. % copper. Displacement of the excess copper during crystallization resulted in the formation of two-phase nanocrystal interlayers separating the γ-phase grains.

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Microstructure of the near-surface layers of austenitic stainless steels irradiated with a low-energy, high-current electron beam

Cited by 48 publications

References 5 publications

Surface Modification and Alloying of Aluminum and Titanium Alloys with Low-Energy, High-Current Electron Beams

Surface Modification and Alloying of Aluminum and Titanium Alloys with Low-Energy, High-Current Electron Beams

Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam

Pulsed electron-beam melting of a copper — steel 316 system: Evolution of the chemical composition, microstructure, and properties

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