NDLI: Research on formation and stability of keyhole in stationary laser welding on aluminum MMCs reinforced with particles

Content Provider	Springer Nature Link
Author	Meng, Chao Lu, Feng gui Cui, Hai chao Tang, Xin hua
Copyright Year	2012
Abstract	The formation and stability of keyhole in stationary laser welding on aluminum metal matrix composites reinforced with particles are studied using a numerical simulation. The interaction between molten pool and reinforcement particles is evaluated by using the particle–fluid coupling model in the numerical simulation. In order to study the effect of different volume fractions of particles on the keyhole stability and fluid flow inside the molten pool, keyhole formation process, variation of free surface, temperature distribution, and fluid flow are calculated numerically, respectively. The calculation results show that the keyhole is stable at the beginning under different conditions and then the protrusion occurs inside the keyhole with increasing calculation time. The flow behavior of molten pool affected by particles and forces acting on the surface could explain the forming of humps inside the keyhole, which directly cause the variation of the keyhole. As the volume fraction of TiB2 particles increases, the keyhole is more likely to be instable and the oscillation occurs at an earlier time. Fluctuations of the surface tension and recoil pressure due to the uneven distribution play an important role in the instability of the keyhole.
Starting Page	2917
Ending Page	2925
Page Count	9
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	67
Issue Number	9-12
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2013-01-05
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Keyhole stability TiB2 particles Stationary laser welding Numerical simulation Industrial and Production Engineering Production/Logistics/Supply Chain Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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