Single-layer powder base metal system (X-Z plane) at t=0
7
Result
8.0e+00
4
3 6
.0e-04 2
1 5
400 $m
Powder
40 $m
Base
X
Y
X
Z
&'
&(
&)
1.9e+03
1800
1600
Field_30
800
1200
1.9e+03
1800
1400
1000
Horizontal
X
Y
X
Z
P
Vertical
Laser direction
P
X
Y
Unsteady Heat Transfer in Semi-infinite So
Solidification process of the coating layer during a ther
operation is an unsteady heat transfer problem. As we d
earlier, thermal spray process deposits thin layer of coat
materials on surface for protection and thermal resistant
as shown. The heated, molten materials will attach to th
and cool down rapidly. The cooling process is importan
the accumulation of residual thermal stresses in the coa
solid
liquid
Coating with density ,
latent heat of fusion: hsf
Substrate, k,
Centerline
1600
Field_30
1200
1.9e+03
1800
1400
1000
Horizontal
X
Y
X
Z
P
Vertical
Laser direction
P
X
Y
Unsteady Heat Transfer in Semi-infinite Solids
Solidification process of the coating layer during a thermal spray
operation is an unsteady heat transfer problem. As we discuss
earlier, thermal spray process deposits thin layer of coating
materials on surface for protection and thermal resistant purposes
as shown. The heated, molten materials will attach to the substra
and cool down rapidly. The cooling process is important to preve
the accumulation of residual thermal stresses in the coating layer.
S(t)
solid
liquid
Coating with density ,
latent heat of fusion: hsf
Substrate, k,
Centerline
Initial temperature profiles of the cross section of the melt pool (X-Z plane)
1.9e+03
1600
Field_30
1200
1.9e+03
1800
1400
1000
Horizontal
X
Y
X
Z
P
Vertical
Laser direction
P
X
Y
Unsteady Heat Transfer in Semi-infinite Solids
Solidification process of the coating layer during a thermal spray
operation is an unsteady heat transfer problem. As we discuss
earlier, thermal spray process deposits thin layer of coating
materials on surface for protection and thermal resistant purposes,
as shown. The heated, molten materials will attach to the substrate
and cool down rapidly. The cooling process is important to prevent
the accumulation of residual thermal stresses in the coating layer.
S(t)
solid
liquid
Coating with density ,
latent heat of fusion: hsf
Substrate, k,
Centerline
Case Study in Dilute Al-Si System:
FEM Modelling of Thermal Transfer Conditions