International Congress on Applications of Lasers &Amp; Electro-Optics 2001
DOI: 10.2351/1.5059786
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Control of laser weld distortion by thermal tensioning

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Cited by 6 publications
(12 citation statements)
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“…303 Michaleris and Sun 304 and Dull et al 305 have applied thermal tensioning to reduce buckling distortion, whereas Dong et al 306 developed an in-process thermal stretching technique for effective mitigation of residual stresses and distortion on repair welding of aluminium panels. Barber et al, 307 van der Aa et al 308 and Williams and co-workers 285,[309][310][311] have applied local cooling to FSW, using either solid or liquid CO 2 trailing the heat source, as a means of creating dynamically controlled low residual stress and distortion free welds; others have used water jets. 312 Several mechanical tensioning systems have been proposed.…”
Section: As Welded Residual Stressesmentioning
confidence: 99%
“…303 Michaleris and Sun 304 and Dull et al 305 have applied thermal tensioning to reduce buckling distortion, whereas Dong et al 306 developed an in-process thermal stretching technique for effective mitigation of residual stresses and distortion on repair welding of aluminium panels. Barber et al, 307 van der Aa et al 308 and Williams and co-workers 285,[309][310][311] have applied local cooling to FSW, using either solid or liquid CO 2 trailing the heat source, as a means of creating dynamically controlled low residual stress and distortion free welds; others have used water jets. 312 Several mechanical tensioning systems have been proposed.…”
Section: As Welded Residual Stressesmentioning
confidence: 99%
“…12,13 Li et al and van der Aa et al have looked into the positioning of heat sinks in DC-LSND and found it to be the most important factors for maximising the relief of residual welding stresses. 18,33 Richards et al found that a leading heat sink was much less effective in modifying the thermal field and reducing the residual stresses.…”
Section: Discussionmentioning
confidence: 97%
“…In their DC-LSND process, the thermal tensioning was achieved by spraying a cryogenic liquid, delivered from a nozzle which moved along with the heat source, to the solidifying weld metal at the rear of the laser spot. 13,14 Soul et al and Li et al applied the DC-LSND technique in arc welding titanium alloy sheets and studied the welding temperature field. Their results showed that the high temperature region was limited, and the maximum temperature of the sample was much lower than that of conventional arc process.…”
Section: Introductionmentioning
confidence: 99%
“…In order to eliminate buckling distortion, the welding induced stress pattern should be altered. Research by Guan et al, [1][2][3] Gabzdyl et al, 4 Dye et al, 5 Bertaso et al 6,7 and van der Aa et al 8 has shown that the introduction of a localised active cooling source following the welding heat source at a short distance, can lead to minimisation of the buckling distortion, as shown in Fig. 1.…”
Section: Introductionmentioning
confidence: 99%
“…This abnormal thermal field has a significant effect on the residual stress distribution, as was shown by both experimental and modelling work of the active research groups. [1][2][3][4][5][6][7][8][9][10] Welding with a trailing heat sink leads to a longitudinal residual stress distribution (parallel to the welding direction) with low or even compressive stresses around the weld zone and reduced compressive stresses at the plate edges.…”
Section: Introductionmentioning
confidence: 99%