Laser-arc interaction with metals

Bezpal'ko, E B; Gureev, D. M.; Zaikin, A. E.; Zolotarevskiĭ, A V; Kanavin, A. P.; Katulin, V A; Кузнецов, С. И.; Николаев, В. Д.; Петров, А. С.

doi:10.1070/qe1987v017n11abeh010946

Cited by 5 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bezpal'ko et al investigated the influence of low power CO 2 laser radiation on the behaviour of plasma arcs in interaction with metals. 8 They found a stabilisation of the anode spot in the focusing region of the laser beam above a certain threshold intensity of the incident laser beam. Below this threshold, the stability of the arc spot position was lost.…”

Section: Introductionmentioning

confidence: 98%

“…This stabilisation effect was especially pronounced at high feedrates and low GTAW current levels. Bezpal'ko et al investigated the influence of low power CO 2 laser radiation on the behaviour of plasma arcs in interaction with metals 8. They found a stabilisation of the anode spot in the focusing region of the laser beam above a certain threshold intensity of the incident laser beam.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stabilisation of plasma welding arcs by low power laser beams

Mahrle

Rose

Schnick

et al. 2013

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

Results of an experimental study are presented in which the impact of a low power laser beam on the stability behaviour of plasma arcs was investigated. Both heat sources were arranged in a recently developed coaxial set-up. Bead on plate welding trials on AISI 304 stainless steel sheets demonstrated that the additional laser beam is capable of extending existing limitations of low current plasma arc welding processes with respect to realisable welding speeds. In particular, an effective stabilisation of the anodic arc attachment under conditions of direct current electrode negative plasma arc welding was achieved by use of a laser beam with only 100 W output power. As a result of a performed stability analysis, the particular conditions for arc stabilisation are specified and co nclusions about the most probable physical reasons for the stabilising action of the laser beam are drawn

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Stabilisation of plasma welding arcs by low power laser beams

Mahrle

Rose

Schnick

et al. 2013

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

show abstract

Hydrodynamic processes in a melt bath under laser–arc interaction conditions

Zaikin¹,

Katulin²,

Levin³

et al. 1991

Sov. J. Quantum Electron.

View full text Add to dashboard Cite

We show that the 3D charged Banados-Teitelboim-Zanelli (BTZ) black hole solution interpolates between two different 2D AdS spacetimes: a near-extremal, nearhorizon AdS 2 geometry with constant dilaton and U(1) field and an asymptotic AdS 2 geometry with a linear dilaton. Thus, the charged BTZ black hole can be considered as interpolating between the two different formulations proposed until now for AdS 2 quantum gravity. In both cases the theory is the chiral half of a 2D CFT and describes, respectively, Brown-Hennaux-like boundary deformations and near-horizon excitations. The central charge c as of the asymptotic CFT is determined by 3D Newton constant G and the AdS length l, c as = 3l/G, whereas that of the near-horizon CFT also depends on the U(1) charge Q, c nh ∝ lQ/ √ G.

show abstract

Mass transfer in a melt under laser-arc interaction conditions

Zaikin¹,

Levin²,

Петров³

1992

Sov. J. Quantum Electron.

Self Cite

View full text Add to dashboard Cite

We show that several well-known one-dimensional quantum systems possess a hidden non-local supersymmetry. The simplest example is the open XXZ spin chain with = −1/2. We use the supersymmetry to place lower bounds on the ground-state energy with various boundary conditions. For an odd number of sites in the periodic chain, and with a particular boundary magnetic field in the open chain, we can derive the ground-state energy exactly. The supersymmetry thus explains why it is possible to solve the Bethe equations for the ground state in these cases. We also show that a similar spacetime supersymmetry holds for the t-J model at its integrable ferromagnetic point, where the spacetime supersymmetry and the Hamiltonian it yields coexist with a global u(1|2) graded Lie algebra symmetry. Possible generalizations to other algebras are discussed.At J = ±2t, and the particular chemical potential given in (12), the t-J Hamiltonian has a global u(1|2) symmetry rotating the three states on each site into each other [15]. One can thus think of the J = 2t case as the antiferromagnetic u(1|2) Heisenberg model, and the J = −2t case as the ferromagnetic one. Three of the nine generators of u(1|2) symmetry are fermionic, while the other six are bosonic, so this is a graded Lie algebra. The generators areBecause of the fermionic generators, such a symmetry is often called 'supersymmetry' in condensed matter physics. One should keep in mind that it is different from the spacetime

show abstract

Laser-arc interaction with metals

Cited by 5 publications

References 1 publication

Stabilisation of plasma welding arcs by low power laser beams

Stabilisation of plasma welding arcs by low power laser beams

Hydrodynamic processes in a melt bath under laser–arc interaction conditions

Mass transfer in a melt under laser-arc interaction conditions

Contact Info

Product

Resources

About