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    Analysis of the Heat-Affected Zone and Ablation Efficiency in Terms of Burst Mode Parameters During High Power Picosecond Laser Micromachining of Metals

    Source: Journal of Manufacturing Science and Engineering:;2023:;volume( 145 ):;issue: 004::page 41006-1
    Author:
    Zhang, Sijie
    ,
    Shin, Yung C.
    DOI: 10.1115/1.4056403
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper presents a systematic study on using the burst mode ablation to limit the heat-affected zone (HAZ) while maintaining a high ablation efficiency using a high-power industrial picosecond laser with burst fluence larger than 10 J/cm2. An extended three-dimensional two-temperature model (3D-TTM) was employed to study the mechanism of the HAZ development and to predict the ablation efficiency with experimental validation. The essentiality of including the lattice heat conduction to predict accurate HAZ was discussed. The effect of the number of pulses per burst and pulse-to-pulse separation time was investigated. The optimal number of pulses per burst was obtained by using the 3D-TTM for copper and stainless steel. The 3D-TTM suggested that by using the optimal number of pulses per burst, a maximum reduction of 77% and 61% in HAZ could be achieved for copper and stainless steel respectively. And the corresponding ablation efficiency will be increased by 24% and 163% for copper and stainless steel at the same time. This study showed that burst mode laser machining at high fluence is an effective way of increasing efficiency while limiting the HAZ.
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      Analysis of the Heat-Affected Zone and Ablation Efficiency in Terms of Burst Mode Parameters During High Power Picosecond Laser Micromachining of Metals

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4292271
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    contributor authorZhang, Sijie
    contributor authorShin, Yung C.
    date accessioned2023-08-16T18:39:00Z
    date available2023-08-16T18:39:00Z
    date copyright1/19/2023 12:00:00 AM
    date issued2023
    identifier issn1087-1357
    identifier othermanu_145_4_041006.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4292271
    description abstractThis paper presents a systematic study on using the burst mode ablation to limit the heat-affected zone (HAZ) while maintaining a high ablation efficiency using a high-power industrial picosecond laser with burst fluence larger than 10 J/cm2. An extended three-dimensional two-temperature model (3D-TTM) was employed to study the mechanism of the HAZ development and to predict the ablation efficiency with experimental validation. The essentiality of including the lattice heat conduction to predict accurate HAZ was discussed. The effect of the number of pulses per burst and pulse-to-pulse separation time was investigated. The optimal number of pulses per burst was obtained by using the 3D-TTM for copper and stainless steel. The 3D-TTM suggested that by using the optimal number of pulses per burst, a maximum reduction of 77% and 61% in HAZ could be achieved for copper and stainless steel respectively. And the corresponding ablation efficiency will be increased by 24% and 163% for copper and stainless steel at the same time. This study showed that burst mode laser machining at high fluence is an effective way of increasing efficiency while limiting the HAZ.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAnalysis of the Heat-Affected Zone and Ablation Efficiency in Terms of Burst Mode Parameters During High Power Picosecond Laser Micromachining of Metals
    typeJournal Paper
    journal volume145
    journal issue4
    journal titleJournal of Manufacturing Science and Engineering
    identifier doi10.1115/1.4056403
    journal fristpage41006-1
    journal lastpage41006-10
    page10
    treeJournal of Manufacturing Science and Engineering:;2023:;volume( 145 ):;issue: 004
    contenttypeFulltext
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