Solidification with a Thermal Gradient in L-PBF (Equiaxed+Columnar) (1D_Temp)
Posted: Sun Sep 26, 2021 7:44 pm
Dear Bernd,
I am trying to simulate both equiaxed and columnar grain structures in my simulation for ferritic steel with the ODS system included during the AM solidification process. As a part of my first approach, I tried to simulate the equiaxed structure with the seed-density model and turned out to be successful. At present, I am trying to use the 1D_temp model as a reference to start with and I am initially trying to follow the approach described by Oba et.al (1) to map both the equiaxed and columnar structure. Unfortunately, I am facing the following problems
1. I have two different cooling rates (ie. top and bottom of the melt pool) to be inputted, but apart from the initial top and bottom temperature, I don't find a way to include both these data into my input file.
2. When I try to define two initial temperatures for the bottom and top, for example, 1000°C at the bottom and 2000°C at the top, I don't see any strong temperature gradients in the temp.mcr output either at the top or bottom rather only a difference of 10-20°C.
Thanks
Best Regards
Venkatesh
References
1. https://www.researchgate.net/publicatio ... eld_Method
I am trying to simulate both equiaxed and columnar grain structures in my simulation for ferritic steel with the ODS system included during the AM solidification process. As a part of my first approach, I tried to simulate the equiaxed structure with the seed-density model and turned out to be successful. At present, I am trying to use the 1D_temp model as a reference to start with and I am initially trying to follow the approach described by Oba et.al (1) to map both the equiaxed and columnar structure. Unfortunately, I am facing the following problems
1. I have two different cooling rates (ie. top and bottom of the melt pool) to be inputted, but apart from the initial top and bottom temperature, I don't find a way to include both these data into my input file.
2. When I try to define two initial temperatures for the bottom and top, for example, 1000°C at the bottom and 2000°C at the top, I don't see any strong temperature gradients in the temp.mcr output either at the top or bottom rather only a difference of 10-20°C.
Thanks
Best Regards
Venkatesh
References
1. https://www.researchgate.net/publicatio ... eld_Method