Solidification with a Thermal Gradient in L-PBF (Equiaxed+Columnar)
Posted: Wed Oct 13, 2021 11:59 am
Hi all,
I am working with the author of the topic before (viewtopic.php?f=9&t=746) on a simulation of the solidification after the LPBF process.
We initially tried different approaches to achieve a combined columnary and equiaxed solidification. When we applied a thermal profile on the T002_AlCu example, which is resembling the thermal conditions during the scanning motion of the laser in LPBF, we were initially happy with the results. Besides a planar solidification from the top and the details of the solidification starting in the melt pool, this is what we want to see with our alloy.
I changed the driving file according to our needs (database, concentrations etc.) but the solidification changed massively.
It is my opinion, that the solidification behaviour on this scale is mostly influenced by the thermal conditions. Of course, I expected some changes but espacially the missing columnary growth is confusing to me.
Do you have any suggestions, what paramters can also be changed to influence the solidification?
I am thankful for your suggestions.
Best regards,
Moritz
I am working with the author of the topic before (viewtopic.php?f=9&t=746) on a simulation of the solidification after the LPBF process.
We initially tried different approaches to achieve a combined columnary and equiaxed solidification. When we applied a thermal profile on the T002_AlCu example, which is resembling the thermal conditions during the scanning motion of the laser in LPBF, we were initially happy with the results. Besides a planar solidification from the top and the details of the solidification starting in the melt pool, this is what we want to see with our alloy.
I changed the driving file according to our needs (database, concentrations etc.) but the solidification changed massively.
It is my opinion, that the solidification behaviour on this scale is mostly influenced by the thermal conditions. Of course, I expected some changes but espacially the missing columnary growth is confusing to me.
Do you have any suggestions, what paramters can also be changed to influence the solidification?
I am thankful for your suggestions.
Best regards,
Moritz