Investigation of the Formation and Energy Density of High-Current Pulsed Electron Beams

Daichi, Yoshiaki; Wang, Zhigang; Yamazaki, Kazuo; Sano, Sadao

doi:10.1007/s11090-007-9080-4

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…This evolution is clearly shown in Figure 2. Figure 2 b) in particular showed the initial stages of electron beam induced surface polishing after only a single pulse treatment at 15kV cathode voltage, equivalent to a total surface energy input of 1.38J/cm 2 [24]. Whilst the surface appeared smoother, deeper scratches still remained and resulted in no change in the measurable surface roughness.…”

Section: 3mentioning

confidence: 95%

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The effect of large-area pulsed electron beam melting on the corrosion and microstructure of a Ti6Al4V alloy

Walker

Murray

Nie

et al. 2014

Applied Surface Science

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The use of titanium alloys in biomedical applications continues to increase due to the excellent stiffness to weight ratio and high corrosion resistance. In order to improve the surface wettability and corrosion properties of a Ti--6Al--4V alloy, the surface treatment method, large area electron beam melting technique was investigated. Polished samples were subject to pulsed treatments of 1, 15 and 25 at 1.38 J/cm 2 beam energy. Surface roughness and contact wetting angles were reduced as a result of the treatment. Microstructural analysis of the surface by XRD and FIB--TEM revealed a martensitic alpha prime phase formed as a result of the high cooling rates induced by the treatment. The presence of this homogenous martensite layer was shown to facilitate a compact passive oxide layer formation during corrosion, thus improving corrosion rates by several orders of magnitude compared to an untreated sample. Large area electron beam melting of Ti--6Al--4V induced a number of changes to the near surface microstructure of the samples, all of which could be used to tailor mechanical and corrosion properties to that of a desired application, without compromising the bulk material properties. These are explored in detail in this work.

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Section: 3mentioning

confidence: 95%

“…The electron beam accelerated in the double layer is transported through the anode plasma to a collector cathode where the work piece is placed. Samples were treated at 15kV cathode voltage for 1, 15 or 25 pulses, translating to an energy input of 1.38 J/cm 2 [24], with constant time between pulses of 11 seconds. …”

Section: Pulsed Electron Beam Treatmentmentioning

confidence: 99%

The effect of large-area pulsed electron beam melting on the corrosion and microstructure of a Ti6Al4V alloy

Walker

Murray

Nie

et al. 2014

Applied Surface Science

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“…As attested by the increasing number of papers published recently from different research groups [37][38][39][40][41][42][43][44][45][46], the LEHCPEB surface treatment technique is now spreading worldwide seeking for additional new applications including, for example, surface cleaning, surface alloying [14,32,41,42], surface strengthening, polishing, perforating, homogenization, and pre-or posttreatment.…”

Section: Modification Of Surface Crystallographic Texturesmentioning

confidence: 99%

Surface Modification of Light Alloys by Low-Energy High-Current Pulsed Electron Beam

Zhang

Hao

Grosdidier

et al. 2012

Journal of Metallurgy

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This paper reviews results obtained by the research groups developing the low-energy high-current pulsed electron beam (LEHCPEB) in Dalian (China) and Metz (France) on the surface treatment of light alloys. The pulsed electron irradiation induces an ultra-fast thermal cycle at the surface combined with the formation of thermal stress and shock waves. As illustrated for Mg alloys and Ti, this results in deep subsurface hardening (over several 100 μm) which improves the wear resistance. The analysis of the top surface melted surface of light alloys also often witnesses evaporation and condensation of chemical species. This phenomenon can significantly modify the melt chemistry and was also suggested to lead to the development of specific solidification textures in the rapidly solidified layer. The potential use of the LEHCPEB technique for producing thermomechanical treatments under the so-called heating mode and, thus, modify the surface crystallographic texture, and enhance solid-state diffusion is also demonstrated in the case of the FeAl intermetallic compound.

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Investigation of the Formation and Energy Density of High-Current Pulsed Electron Beams

Cited by 2 publications

References 10 publications

The effect of large-area pulsed electron beam melting on the corrosion and microstructure of a Ti6Al4V alloy

The effect of large-area pulsed electron beam melting on the corrosion and microstructure of a Ti6Al4V alloy

Surface Modification of Light Alloys by Low-Energy High-Current Pulsed Electron Beam

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