In this step, you assign a material to each geometry body, considering the following guidelines:
Different materials may be assigned to part bodies and Predefined Support bodies. STL Supports and Generated Supports are automatically assigned the material of the associated part body.
If the part consists of multiple materials, choose one material that is most representative of the model as a whole, specifically for thermal properties. This is considered the Representative Material. Consider choosing the material with the lowest thermal diffusivity. The representative material will affect the timing calculations for time stepping, but nothing else. Result items are still calculated based on the material assignment per body. (The Representative Material field appears in the AM Process object if there are multiple materials assigned in the model.)
The base plate can be a different material than the build materials.
Non-build components can be different materials than the build materials.
Procedural Steps
When you select a geometry entity in the project tree, the Details view lists all the settings associated with that body.
In the project tree under Model, expand the Geometry object to see its child objects below it. Select the geometric entity that is the build geometry and, in Details view, change the Assignment (under Material) to be the AM material that you want to use, either one of the Ansys predefined samples, or a custom material you defined in Engineering Data. When you assign a material to the build, the child objects below it (the part and supports) are also assigned that same material.
Select the entity that is the base plate body and change its material Assignment, as desired.