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    Analytical Solution of Temperature Distribution in a Nonuniform Medium Due to a Moving Laser Beam and a Double Beam Scanning Strategy in the Selective Laser Melting Process

    Source: Journal of Heat Transfer:;2018:;volume( 140 ):;issue: 008::page 82302
    Author:
    Loh, Loong-Ee
    ,
    Song, Jie
    ,
    Guo, Fenglin
    ,
    Bi, Guijun
    DOI: 10.1115/1.4040256
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Selective laser melting (SLM) has received increasing attention in recent years as an innovative manufacturing technique. The present SLM process only uses a single laser beam to melt and consolidate the powder, which may result in excessive evaporation. In this paper, a double beam scanning strategy is investigated in which the first laser beam preheats the powder just below the sintering point while the second laser beam completely melts the powder. An analytical solution on the temperature distribution heated by a moving laser beam in the powder-bulk domain is derived and is used to determine the critical radius of the first laser beam. The single and double beam scanning strategies are compared numerically and it is found that double beam scanning can effectively reduce material evaporation and increase the amount of powder melted in the SLM process.
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      Analytical Solution of Temperature Distribution in a Nonuniform Medium Due to a Moving Laser Beam and a Double Beam Scanning Strategy in the Selective Laser Melting Process

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4251784
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    contributor authorLoh, Loong-Ee
    contributor authorSong, Jie
    contributor authorGuo, Fenglin
    contributor authorBi, Guijun
    date accessioned2019-02-28T11:01:10Z
    date available2019-02-28T11:01:10Z
    date copyright6/29/2018 12:00:00 AM
    date issued2018
    identifier issn0022-1481
    identifier otherht_140_08_082302.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4251784
    description abstractSelective laser melting (SLM) has received increasing attention in recent years as an innovative manufacturing technique. The present SLM process only uses a single laser beam to melt and consolidate the powder, which may result in excessive evaporation. In this paper, a double beam scanning strategy is investigated in which the first laser beam preheats the powder just below the sintering point while the second laser beam completely melts the powder. An analytical solution on the temperature distribution heated by a moving laser beam in the powder-bulk domain is derived and is used to determine the critical radius of the first laser beam. The single and double beam scanning strategies are compared numerically and it is found that double beam scanning can effectively reduce material evaporation and increase the amount of powder melted in the SLM process.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAnalytical Solution of Temperature Distribution in a Nonuniform Medium Due to a Moving Laser Beam and a Double Beam Scanning Strategy in the Selective Laser Melting Process
    typeJournal Paper
    journal volume140
    journal issue8
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4040256
    journal fristpage82302
    journal lastpage082302-6
    treeJournal of Heat Transfer:;2018:;volume( 140 ):;issue: 008
    contenttypeFulltext
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