TY - JOUR
T1 - Combined effects of temperature field and ultrasonic vibration on bubble motion in laser joining of plastic to metal
AU - Chen, Yujiao
AU - Yue, Tai Man
AU - Guo, Zhongning
N1 - Funding Information:
This work was supported by research start-up funds of DGUT (grantnumber GC300501-081) and funded by the Research Committee of the Hong Kong Polytechnic University under research student project ac-count code RTMA.
PY - 2021/2
Y1 - 2021/2
N2 - A previous study has found that applying ultrasonic vibration in laser joining of Polyethylene terephthalate (PET) plastic to Ti metal can greatly reduce bubbles formed in the joint. In this study, the theoretical basis on the combined effects of pressure and temperature fields on the trajectory of bubbles was analyzed using finite element simulation. A non-uniform temperature field influences the evaporation momentum pressure acting on a bubble, causing it to travel from a low to a high temperature region. A properly designed ultrasonic transducer tool, however, can create an unbalanced pressure field around a bubble. Under the combined effects of these elements, bubbles in the molten pool can be made to escape from the joint. The predicted results and obtained experimental outcomes matched well, which were also supported by the evidence of captured high-speed camera images.
AB - A previous study has found that applying ultrasonic vibration in laser joining of Polyethylene terephthalate (PET) plastic to Ti metal can greatly reduce bubbles formed in the joint. In this study, the theoretical basis on the combined effects of pressure and temperature fields on the trajectory of bubbles was analyzed using finite element simulation. A non-uniform temperature field influences the evaporation momentum pressure acting on a bubble, causing it to travel from a low to a high temperature region. A properly designed ultrasonic transducer tool, however, can create an unbalanced pressure field around a bubble. Under the combined effects of these elements, bubbles in the molten pool can be made to escape from the joint. The predicted results and obtained experimental outcomes matched well, which were also supported by the evidence of captured high-speed camera images.
KW - Laser joining
KW - Ultrasonic vibration
KW - Bubble movement
KW - Temperature field
KW - Pressure field
UR - https://reader.elsevier.com/reader/sd/pii/S0924013620302600?token=B8E9366D0773BFF1B01D89DC424BF95FE41DCCC283EE09DFD9852C13E24B0DB62F6867B0D4E3E461AF495D341DC285F2
UR - http://www.scopus.com/inward/record.url?scp=85089279111&partnerID=8YFLogxK
U2 - 10.1016/j.jmatprotec.2020.116846
DO - 10.1016/j.jmatprotec.2020.116846
M3 - Journal article
VL - 288
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
M1 - 116846
ER -