Finite-element modeling of heat flow in deep-penetration laser welds in aluminum alloys
- Pennsylvania State Univ., University Park (USA)
A two-dimensional finite-element nonlinear transient heat conduction model was developed and used to simulate deep-penetration keyhole laser welds in aluminum alloys. The weld thermal profiles were calculated in an arbitrary plane as the laser beam approached and passed the plane. From the calculated thermal profiles, three-dimensional quasi-steady-state shapes of the weld pools were determined. The predicted weld bead shape and dimensions were in good agreement with the experimental results. The experimental laser welds in aluminum alloys contained large amounts of porosity. The model predicted large mushy zones for aluminum laser welds during solidification, which in turn increase the probability of porosity formation by increased bubble entrapment. 32 refs.
- OSTI ID:
- 7173799
- Journal Information:
- Numerical Heat Transfer, Part A: Applications; (USA), Journal Name: Numerical Heat Transfer, Part A: Applications; (USA) Vol. 16:3; ISSN 1040-7782; ISSN NHAAE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ALUMINIUM ALLOYS
CARBON DIOXIDE LASERS
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
FABRICATION
FINITE ELEMENT METHOD
GAS LASERS
HEAT AFFECTED ZONE
HEAT TRANSFER
HEATING
JOINING
LASER RADIATION
LASER WELDING
LASERS
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
RADIATIONS
SIMULATION
THERMAL CONDUCTION
TWO-DIMENSIONAL CALCULATIONS
WELDING
ZONES