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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Evidence of solidification crack propagation in pulsed laser welding of aluminum alloy
AU - Jia, Z.
AU - Zhang, P.
AU - Yu, Z.
AU - Wu, D.
AU - Tian, Y.
AU - Yan, H.
PY - 2021/6/7
Y1 - 2021/6/7
N2 - It is difficult to collect the crack propagation signal under general continuous welding condition due to other signal interference of molten pool. In order to study the effect of residual stress on crack propagation, acoustic emission technology was successfully applied to monitor welding process according to the characteristics of pulsed laser welding. Crack free welding is achieved by reducing the pulse interval to limited the crack size of single pulse welding spot. The welding process was monitored synchronously by high speed photography and acoustic emission, the evidence of crack propagation after solidification of weld is successfully captured.
AB - It is difficult to collect the crack propagation signal under general continuous welding condition due to other signal interference of molten pool. In order to study the effect of residual stress on crack propagation, acoustic emission technology was successfully applied to monitor welding process according to the characteristics of pulsed laser welding. Crack free welding is achieved by reducing the pulse interval to limited the crack size of single pulse welding spot. The welding process was monitored synchronously by high speed photography and acoustic emission, the evidence of crack propagation after solidification of weld is successfully captured.
KW - Aluminum alloys
KW - Crack propagation
KW - Cracks
KW - High speed photography
KW - Pulsed lasers
KW - Solidification
KW - Welding
KW - Crack free
KW - Crack sizes
KW - Emission technology
KW - Molten pool
KW - Single-pulse welding
KW - Solidification cracks
KW - Welding conditions
KW - Welding process
KW - Acoustic emission testing
U2 - 10.1364/OE.422369
DO - 10.1364/OE.422369
M3 - Journal article
VL - 29
SP - 18495
EP - 18501
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 12
ER -