英语翻译4.Conclusions 1.A two-dimensional thermo-mechanical fini

英语翻译
4.Conclusions
1.A two-dimensional thermo-mechanical finite element model was developed,and applied to the
cladding of C95600 on AA333.Since the film has a lower coefficient of thermal expansion than
the substrate,the latter was found to be predominantly in tension and the former in compression.
2.The maximum values found for the longitudinal stress are,for both materials,about 65% of the
yield stress at room temperature.
3.Stresses are concentrated at the interface between the clad and the substrate.
4.Although the material models that were utilized are simple,the Finite Element model that was
developed is still expected to provide reasonable insight into the stress fields that develop in laser
cladding.This can be a very useful tool,for instance,in predicting failure behavior of laser cladded
materials.
5.This model can also be used in the following way:a parametric study based on the temperature
field can be undertaken,in order to define ranges of process parameters that are expected to lead to
successful cladding operations.Then,within those ranges,values of parameters (e.g.laser power
and scanning speed) that minimize the residual stresses can be determined.The stresses are
expected to depend indirectly on the process parameters through their dependence,e.g.,on total
plastic strain (which depends on interaction time) and thermal strain (which depends on the
temperature distribution).