scholarly journals Investigation of the Effects of an Intense Pulsed Ion Beam on the Surface Melting of IN718 Superalloy Prepared with Selective Laser Melting

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1178
Author(s):  
Min Min ◽  
Shuiting Ding ◽  
Xiao Yu ◽  
Shijian Zhang ◽  
Haowen Zhong ◽  
...  
Keyword(s):  
Energy Density ◽  
Selective Laser Melting ◽  
Ion Beam ◽  
Pulse Length ◽  
High Energy ◽  
Surface Melting ◽  
High Energy Density ◽  
Irradiation Effect ◽  
Laser Melting ◽  
In718 Superalloy

Intense pulsed ion beam irradiation on IN718 superalloy prepared with selective laser melting as an after-treatment for surface melting is introduced. It is demonstrated that intense pulsed ion beam composed of protons and carbon ions, with a maximum current density of 200 A/cm2 and a pulse length of 80 ns, can induce surface melting and the surface roughness changes significantly due to the generation of micro-defects and the flow of the molten surface. Irradiation experiments and thermal field simulation revealed that the energy density of the ion beam plays a predominant role in the irradiation effect—with low energy density, the flow of molten surface is too weak to smooth the fluctuations on the surface. With high energy density, the surface can be effectively melted and smoothened while micro-defects, such as craters, may be generated and can be flattened by an increased number of pulses. The research verified that for the surface melting with intense pulsed ion beam (IPIB), higher energy density should be used for stronger surface fluidity and a greater pulse number is also required for the curing of surface micro-defects.

scholarly journals Target heating in high-energy-density matter experiments at the proposed GSI FAIR facility: Non-linear bunch rotation in SIS100 and optimization of spot size and pulse length

2004 ◽  
Vol 22 (4) ◽  
pp. 485-493 ◽  
Author(s):  
N.A. TAHIR ◽  
S. UDREA ◽  
C. DEUTSCH ◽  
V.E. FORTOV ◽  
N. GRANDJOUAN ◽  
...  
Keyword(s):  
Energy Density ◽  
Kinetic Energy ◽  
Ion Beam ◽  
Pulse Length ◽  
Spot Size ◽  
High Energy ◽  
Particle Energy ◽  
High Energy Density ◽  
Parameter Study ◽  
Worst Case

The Gesellschaft für Schwerionenforschung (GSI) Darmstadt has been approved to build a new powerful facility named FAIR (Facility for Antiprotons and Ion Research) which involves the construction of a new synchrotron ring SIS100. In this paper, we will report on the results of a parameter study that has been carried out to estimate the minimum pulse lengths and the maximum peak powers achievable, using bunch rotation RF gymnastic-including nonlinearities of the RF gap voltage in SIS100, using a longitudinal dynamics particle in cell (PIC) code, ESME. These calculations have shown that a pulse length of the order of 20 ns may be possible when no prebunching is performed while the pulse length gradually increases with the prebunching voltage. Three different cases, including 0.4 GeV/u, 1 GeV/u, and 2.7 GeV/u are considered for the particle energy. The worst case is for the kinetic energy of 0.4 GeV/u which leads to a pulse length of about 100 ns for a prebunching voltage of 100 kV (RF amplitude). The peak power was found to have a maximum, however, at 0.5–1.5kV prebunching voltage, depending on the mean kinetic energy of the ions. It is expected that the SIS100 will deliver a beam with an intensity of 1–2 × 1012 ions. Availability of such a powerful beam will make it possible to study the properties of high-energy-density (HED) matter in a parameter range that is very difficult to access by other means. These studies involve irradiation of high density targets by the ion beam for which optimization of the target heating is the key problem. The temperature to which a target can be heated depends on the power that is deposited in the material by the projectile ions. The optimization of the power, however, depends on the interplay of various parameters including beam intensity, beam spot area, and duration of the ion bunch. The purpose of this paper is to determine a set of the above parameters that would lead to an optimized target heating by the future SIS100 beam.

scholarly journals High energy density physics research at IMP, Lanzhou, China

2014 ◽  
Vol 2 ◽  
Author(s):  
Yongtao Zhao ◽  
Rui Cheng ◽  
Yuyu Wang ◽  
Xianming Zhou ◽  
Yu Lei ◽  
...  
Keyword(s):  
Energy Density ◽  
Ion Beam ◽  
Heavy Ion ◽  
High Energy ◽  
High Energy Density ◽  
Accelerator Facility ◽  
High Energy Density Physics ◽  
Research Activities ◽  
Modern Physics ◽  
Heavy Ion Beam

Abstract Recent research activities relevant to high energy density physics (HEDP) driven by the heavy ion beam at the Institute of Modern Physics, Chinese Academy of Sciences are presented. Radiography of static objects with the fast extracted high energy carbon ion beam from the Cooling Storage Ring is discussed. Investigation of the low energy heavy ion beam and plasma interaction is reported. With HEDP research as one of the main goals, the project HIAF (High Intensity heavy-ion Accelerator Facility), proposed by the Institute of Modern Physics as the 12th five-year-plan of China, is introduced.

Electrical resistivity measurements of heavy ion beam generated high energy density aluminium

2006 ◽  
Vol 39 (17) ◽  
pp. 4743-4747 ◽  
Author(s):  
S Udrea ◽  
N Shilkin ◽  
V E Fortov ◽  
D H H Hoffmann ◽  
J Jacoby ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Energy Density ◽  
Ion Beam ◽  
Heavy Ion ◽  
High Energy ◽  
High Energy Density ◽  
Resistivity Measurements ◽  
Heavy Ion Beam

Intense Ion-Beam Treatment of Materials

MRS Bulletin ◽  
1996 ◽  
Vol 21 (8) ◽  
pp. 58-62 ◽  
Author(s):  
Harold A. Davis ◽  
Gennady E. Remnev ◽  
Regan W. Stinnett ◽  
Kiyoshi Yatsui
Keyword(s):  
Energy Density ◽  
Surface Treatment ◽  
Laser Processing ◽  
Beam Energy ◽  
Ion Beam ◽  
The United States ◽  
High Energy ◽  
High Energy Density ◽  
X Rays ◽  
Near Surface

Over the past decade, researchers in Japan, Russia, and the United States have been investigating the application of intense-pulsed-ion-beam (IPIB) technology (which has roots in inertial confinement fusion programs) to the surface treatment and coating of materials. The short range (0.1–10 μm) and high-energy density (1–50 J/cm2) of these short-pulsed (t ≥ 1 μs) beams (with ion currents I = 5–50 kA, and energies E = 100–1,000 keV) make them ideal flash-heat sources to rapidly vaporize or melt the near-surface layer of targets similar to the more familiar pulsed laser deposition (PLD) or laser surface treatment. The vaporized material can form coatings on substrates, and surface melting followed by rapid cooling (109 K/s) can form amorphous layers, dissolve precipitates, and form nonequilibrium microstructures.An advantage of this approach over laser processing is that these beams deliver 0.1–10 KJ per pulse to targets at expected overall electrical efficiencies (i.e., the ratio of extracted ion-beam energy to the total energy consumed in generating the beam) of 15–40% (compared to < 1% for the excimer lasers often used for similar applications). Consequently IPIB hardware can be compact and require relatively low capital investment. This opens the promise of environmentally conscious, low-cost, high-throughput manufacturing. Further, efficient beam transport to the target and excellent coupling of incident ion energy to targets are achieved, as opposed to lasers that may have limited coupling to reflective materials or produce reflecting plasmas at high incident fluence. The ion range is adjustable through selection of the ion species and kinetic energy, and the beam energy density can be tailored through control of the beam footprint at the target to melt (1–10 J/cm2) or to vaporize (10–50 J/cm2) the target surface. Beam pulse durations are short (≥ 1 μs) to minimize thermal conduction. Some disadvantages of IPIB processing over laser processing include the need to form and propagate the beams in vacuum, and the need for shielding of x-rays produced by relatively low-level electron current present in IPIB accelerators. Also these beams cannot be as tightly focused onto targets as lasers, making them unsuitable for applications requiring treatment on small spatial scales.

scholarly journals Diagnostics for ion beam driven high energy density physics experiments

2010 ◽  
Vol 81 (10) ◽  
pp. 10E112 ◽  
Author(s):  
F. M. Bieniosek ◽  
E. Henestroza ◽  
S. Lidia ◽  
P. A. Ni
Keyword(s):  
Energy Density ◽  
Ion Beam ◽  
High Energy ◽  
High Energy Density ◽  
High Energy Density Physics ◽  
Physics Experiments

scholarly journals Investigation of the Possibility of Tailoring the Chemical Composition of the NiTi Alloy by Selective Laser Melting

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1470
Author(s):  
Evgenii Borisov ◽  
Kirill Starikov ◽  
Anatoly Popovich ◽  
Tatiana Tihonovskaya
Keyword(s):  
Energy Density ◽  
Selective Laser Melting ◽  
Laser Processing ◽  
Niti Alloy ◽  
Nickel Content ◽  
Energy Parameter ◽  
High Energy ◽  
Single Treatment ◽  
Technological Parameters ◽  
Laser Melting

In this work a study of the selective laser melting process of two NiTi alloys of equiatomic, and rich Ni composition were conducted. A study of the influence of the technological parameters on the alloy density was carried out. Values of technological parameters were obtained to ensure production of samples with the lowest number of defects. When using process parameters with the same energy density but different values of the constituent technological parameters, the amount of nickel carried away by evaporation changed insignificantly. An increase in the energy density led to an increase in the amount of nickel carried away, causing final samples with lower Ni content. When using multiple laser processing in the low-energy parameter set, it was possible to achieve a decrease in the nickel content in the alloy, similar to that with single high-energy processing. DSC studies showed a significant increase in transformation temperatures upon repeated laser processing due to the higher evaporation of nickel. The use of double laser treatment gave a decrease in the final density of the sample compared to a single treatment, but its value is still higher than when using a single treatment with a higher energy density.

scholarly journals US Heavy Ion Beam Research for High Energy Density Physics Applications and Fusion

2005 ◽  
Author(s):  
R.C. Davidson ◽  
B.G. Logan ◽  
J.J. Barnard ◽  
F.M. Bieniosek ◽  
R.J. Briggs ◽  
...  
Keyword(s):  
Energy Density ◽  
Ion Beam ◽  
Heavy Ion ◽  
High Energy ◽  
High Energy Density ◽  
High Energy Density Physics ◽  
Heavy Ion Beam

scholarly journals Collective Focusing of Intense Ion Beam Pulses for High-energy Density Physics Applications

2011 ◽  
Author(s):  
Mikhail A. Dorf ◽  
Igor D. Kaganovich ◽  
Edward A. Startsev ◽  
Ronald C. Davidson
Keyword(s):  
Energy Density ◽  
Ion Beam ◽  
High Energy ◽  
High Energy Density ◽  
High Energy Density Physics
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