Details
| Original language | English |
|---|---|
| Pages (from-to) | 42-47 |
| Number of pages | 6 |
| Journal | Science and Technology of Welding and Joining |
| Volume | 20 |
| Issue number | 1 |
| Publication status | Published - 22 Oct 2014 |
| Externally published | Yes |
Abstract
Double pulse laser welding is investigated to reduce hot cracking in 6082 aluminium alloy welds. Therefore, Nd:YAG and diode laser pulses are superimposed and synchronised with a specific delay. The diode laser heats the parent metal and weld metal during weld spot solidification to compensate for solidification shrinkage and thermal contraction. The results of conventional pulsed laser welding prove that hot cracking is strongly dependent on the pulse peak power of the Nd:YAG laser, which constrains the crack free penetration depth. Adding the diode laser pulse at a defined time during weld spot solidification eliminated hot cracking. The double pulse welding method allowed the butt welding of 0·5 mm thick 6082 aluminium alloys without the formation of hot cracking.
Keywords
- Aluminium, Double pulses, Hot cracking, Pulsed laser welding
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Science and Technology of Welding and Joining, Vol. 20, No. 1, 22.10.2014, p. 42-47.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Double pulse laser welding of 6082 aluminium alloys
AU - von Witzendorff, Philipp
AU - Hermsdorf, J.
AU - Kaierle, Stefan
AU - Suttmann, Oliver
AU - Overmeyer, Ludger
PY - 2014/10/22
Y1 - 2014/10/22
N2 - Double pulse laser welding is investigated to reduce hot cracking in 6082 aluminium alloy welds. Therefore, Nd:YAG and diode laser pulses are superimposed and synchronised with a specific delay. The diode laser heats the parent metal and weld metal during weld spot solidification to compensate for solidification shrinkage and thermal contraction. The results of conventional pulsed laser welding prove that hot cracking is strongly dependent on the pulse peak power of the Nd:YAG laser, which constrains the crack free penetration depth. Adding the diode laser pulse at a defined time during weld spot solidification eliminated hot cracking. The double pulse welding method allowed the butt welding of 0·5 mm thick 6082 aluminium alloys without the formation of hot cracking.
AB - Double pulse laser welding is investigated to reduce hot cracking in 6082 aluminium alloy welds. Therefore, Nd:YAG and diode laser pulses are superimposed and synchronised with a specific delay. The diode laser heats the parent metal and weld metal during weld spot solidification to compensate for solidification shrinkage and thermal contraction. The results of conventional pulsed laser welding prove that hot cracking is strongly dependent on the pulse peak power of the Nd:YAG laser, which constrains the crack free penetration depth. Adding the diode laser pulse at a defined time during weld spot solidification eliminated hot cracking. The double pulse welding method allowed the butt welding of 0·5 mm thick 6082 aluminium alloys without the formation of hot cracking.
KW - Aluminium
KW - Double pulses
KW - Hot cracking
KW - Pulsed laser welding
UR - http://www.scopus.com/inward/record.url?scp=84921791682&partnerID=8YFLogxK
U2 - 10.1179/1362171814y.0000000255
DO - 10.1179/1362171814y.0000000255
M3 - Article
AN - SCOPUS:84921791682
VL - 20
SP - 42
EP - 47
JO - Science and Technology of Welding and Joining
JF - Science and Technology of Welding and Joining
SN - 1362-1718
IS - 1
ER -