Dynamics of vapor plume in transient keyhole during laser welding of stainless steel: Local evaporation, plume swing and gas entrapment into porosity
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- 作者：Shengyong Panga ; spang@hust.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Xin Chena ; Xinyu Shaob ; Shuili Gongc ; Jianzhong Xiaoa
- 关键词：Laser welding ; Transient keyhole ; Local evaporation ; Plume swing ; Gas entrapment
- 刊名：Optics and Lasers in Engineering
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：82
- 期：Complete
- 页码：28-40
- 全文大小：12228 K
文摘
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Violent local evaporation leads to a complex multiple directions vapor flow.
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The swing of the ejected vapor plume is closely related to the keyhole instability.
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The plume swing oscillation frequency at the keyhole opening is 2.0–8.0 kHz.
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The possible process of the ambient gas entrapment into a bubble is observed.
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