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Numerical and experimental study of the effect of groove on plasma plume during high power laser welding
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10.2351/1.4818823
/content/lia/journal/jla/25/5/10.2351/1.4818823
http://aip.metastore.ingenta.com/content/lia/journal/jla/25/5/10.2351/1.4818823

Figures

Image of FIG. 1.
FIG. 1.

(a) Gaussian-like beam profile and (b) measured beam profile and focus density.

Image of FIG. 2.
FIG. 2.

The schematic of computational domain and boundary conditions.

Image of FIG. 3.
FIG. 3.

The schematic diagram of experiment set-up.

Image of FIG. 4.
FIG. 4.

Weld penetrations of samples with and without groove.

Image of FIG. 5.
FIG. 5.

Computational results of plasma plume along laser incident path ( = 0,  = 0). (a) Temperature, (b) mass fraction of helium, and (c) velocity.

Image of FIG. 6.
FIG. 6.

The computational isotherms of plasma plume on the plane of  = 0. (a) On plate and (b) inside groove.

Image of FIG. 7.
FIG. 7.

Grey contours of typical image of plasma plume. (a) on plate and (b) inside groove.

Image of FIG. 8.
FIG. 8.

Continuous images of plasma plume drawn from welding process randomly. (a) On plate and (b) inside groove.

Image of FIG. 9.
FIG. 9.

The accumulated grey intensity of plasma plume on the plate or inside groove. (a) Accumulated grey intensity of on-plate plume, (b) probability density distribution of (a), (c) frequency spectrum of (a), (d) accumulated grey intensity of inside-groove plume, (e) probability density distribution of (d), and (f) frequency spectrum of (d).

Tables

Generic image for table
TABLE I.

Lennard–Jones parameters for He and Fe.

Generic image for table
TABLE II.

Laser welding parameters of comparison experiments.

Generic image for table
TABLE III.

Parameters of spectral lines for computing plasma temperature.

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/content/lia/journal/jla/25/5/10.2351/1.4818823
2013-08-19
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Numerical and experimental study of the effect of groove on plasma plume during high power laser welding
http://aip.metastore.ingenta.com/content/lia/journal/jla/25/5/10.2351/1.4818823
10.2351/1.4818823
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