D.N.Zou
,
J.Yang
,
Y.L.Huang
,
J.Y.Su
金属学报(英文版)
Based on the continuum model for binary
solid-liquid phase change system, the mathematic model to simulate
the process of laser cladding in situ synthesis
TiCp/Al composite on the surface of aluminum alloy
was formulated. The additive source method was employed to treat
with the heat release of synthetic reaction in powder mixture at
certain temperatures, and also to solve the momentum and heat
transfer caused by the relative movement between laser beam and
the specimen. Two different types of driving forces for flow were
considered in the model, i.e., the buoyancy force and the surface
tension gradient at the laser pool surface. The three-dimensional
transient temperature field simulation program was developed being
based upon the commercial software PHOENICS. The calculated and
observed fusion boundaries were compared and very good agreement
was obtained.
关键词:
numerical simulation
,
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