Epitaxial growth in AM
Posted: Thu Jan 06, 2022 12:28 pm
Hello everyone!
I hope everyone had a great start into 2022!
I am still working on a model for the solidification in the LPBF process. As the model develops, I want to include one more significant characteristic of real Am processes, which is epitaxial grain growth. What I mean by that is the orientation of the grain growth towards a certain direction in a certain angle. This is shown in the paper 'Understanding grain evolution in additive manufacturing through modeling' by Akram et al. 2018 from in figure 1:
To achieve this, I thought the following parameters set in the driving file were sufficient:
The initial grains at the bottom look like this, after a few seconds into the simulation:
Unfortunately, after the solidification has gone on for more steps, no orientation of the forming microstructure can be observed:
This is also the case, if the simulation has finished. Between a simulation with specified grain orientations and without there is no difference.
Has anyone a suggestion, what I am missing here?
I am thankful for every reply.
Best regards,
Moritz
I hope everyone had a great start into 2022!
I am still working on a model for the solidification in the LPBF process. As the model develops, I want to include one more significant characteristic of real Am processes, which is epitaxial grain growth. What I mean by that is the orientation of the grain growth towards a certain direction in a certain angle. This is shown in the paper 'Understanding grain evolution in additive manufacturing through modeling' by Akram et al. 2018 from in figure 1:
To achieve this, I thought the following parameters set in the driving file were sufficient:
The initial grains at the bottom look like this, after a few seconds into the simulation:
Unfortunately, after the solidification has gone on for more steps, no orientation of the forming microstructure can be observed:
This is also the case, if the simulation has finished. Between a simulation with specified grain orientations and without there is no difference.
Has anyone a suggestion, what I am missing here?
I am thankful for every reply.
Best regards,
Moritz