Unstable state of the α-Ti crystal lattice in the surface layers of titanium alloys samples treated by a low-energy high-current pulsed electron beam

2018 ◽  
Author(s):  
O. B. Perevalova ◽  
A. V. Panin ◽  
E. A. Sinyakova
Keyword(s):  
Electron Beam ◽  
Crystal Lattice ◽  
Titanium Alloys ◽  
Low Energy ◽  
Unstable State ◽  
High Current ◽  
Surface Layers ◽  
Pulsed Electron Beam

The effect of a low-energy high-current pulsed electron beam on surface layers of porous zirconium ceramics

2014 ◽  
Vol 40 (9) ◽  
pp. 762-765 ◽  
Author(s):  
A. P. Surzhikov ◽  
T. S. Frangulyan ◽  
S. A. Ghyngazov ◽  
I. P. Vasil’ev
Keyword(s):  
Electron Beam ◽  
Low Energy ◽  
High Current ◽  
Surface Layers ◽  
Pulsed Electron Beam ◽  
Zirconium Ceramics

Microstructure, Texture and Residual Stresses Induced by Surface Thermo-Mechanical Treatments

2011 ◽  
Vol 675-677 ◽  
pp. 9-14
Author(s):  
Thierry Grosdidier ◽  
Bernard Bolle ◽  
J.D. Puerta Velásquez ◽  
J.X. Zou ◽  
Jean-Jacques Fundenberger ◽  
...  
Keyword(s):  
Electron Beam ◽  
Residual Stresses ◽  
High Speed ◽  
Processing Parameters ◽  
Low Energy ◽  
Difficult Case ◽  
High Speed Machining ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Ti Alloys

This paper reviews some recent results concerning surface integrity of materials processed with two important developing techniques: high speed machining (HSM) – here applied to the difficult case of Ti alloys – and low energy high current pulsed electron beam (LEHCPEB) surface treatment of steels. The effect of the processing parameters on the development of microstructure, texture and residual stresses is detailed for modifications occurring both at the surfaces and sub-surfaces.

Effect of High-Current Pulsed Electron Beam Processing of Zr-1%Nb Alloy on Its Oxidation Kinetics at 1200C in Air and Steam

CORROSION ◽  
10.5006/3942 ◽  
2021 ◽  
Author(s):  
Mikhail Slobodyan ◽  
Konstantin Ivanov ◽  
Maxim Elkin ◽  
Vasiliy Klimenov ◽  
Sergey Pavlov ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Current ◽  
Surface Layers ◽  
Research Directions ◽  
Temperature Oxidation ◽  
Pulsed Electron Beam ◽  
Electron Beam Processing ◽  
Heating And Cooling ◽  
Loss Of Coolant ◽  
Kinetics Of

The paper reports the effect of high-current pulsed electron beam (HCPEB) processing of the Zr-1%Nb alloy, as one of the most widely used in water-cooled nuclear reactors, on the kinetics of its oxidation at 1200 °C in air and steam (these conditions are typical for potential loss-of-coolant accidents). It was shown that HCPEB processing caused a change in the surface morphology of the samples. In particular, craters with diameters of about 100 μm were found on the modified surfaces. They had initiated at an energy density of 5 J/cm2 and were characterized by relevant reliefs with microcracks. After HCPEB processing at 10 J/cm2, the craters were deeper with fractured surface layers. In addition, a pronounced surface relief corresponding to quenched martensitic microstructures was observed on the modified sample surfaces that had formed due to high heating and cooling rates. Due to sufficient degradation of the sample surfaces after HCPEB processing at 10 J/cm2, the kinetics of high-temperature oxidation was estimated only for the as-received samples and ones treated at 5 J/cm2. It was found that the as-received samples showed slightly greater weight gain levels in both air and steam environments, which fully correlated with the thickness ratio of the oxide, α-Zr(O) and prior-β layers. These phenomena and further research directions were discussed.

Low Energy High Current Pulsed Electron Beam (LEHCPEB) Treatment: An Effective Way for Improving Surface Microstructure and Properties

2010 ◽  
Vol 636-637 ◽  
pp. 1091-1096
Author(s):  
Thierry Grosdidier ◽  
Jian Xin Zou ◽  
K.M. Zhang ◽  
Sheng Zhi Hao ◽  
Chuang Dong
Keyword(s):  
Electron Beam ◽  
Surface Modifications ◽  
Metastable Phases ◽  
Low Energy ◽  
Surface Microstructure ◽  
High Current ◽  
Present Contribution ◽  
Corrosion Properties ◽  
Pulsed Electron Beam ◽  
Wear And Corrosion

Low energy high current pulsed electron beam (LEHCPEB) is a fairly new technique for surface modifications, including hardening, alloying and formation of metastable phases as well as improvement in wear and corrosion properties. The present contribution gives some new insights on the microstructure modifications encountered at the top surface of HCPEB treated metals. In particular, the potential of the technique for structure modifications associated with the use of the pulsed electron beam under “heating” and “melting” conditions are highlighted.

scholarly journals Surface modification of structural materials by low-energy high-current pulsed electron beam treatment

2014 ◽  
Author(s):  
A. V. Panin ◽  
M. S. Kazachenok ◽  
O. M. Borodovitsina ◽  
E. A. Sinyakova ◽  
Yu. F. Ivanov ◽  
...  
Keyword(s):  
Surface Modification ◽  
Electron Beam ◽  
Structural Materials ◽  
Low Energy ◽  
Electron Beam Treatment ◽  
High Current ◽  
Pulsed Electron Beam
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