Solidification of Al-mg alloy in LPBF process.
Posted: Mon Jan 24, 2022 12:49 pm
Dear All,
Good day. I have been working on the solidification of an alloy (Al-Mg-Zr) by LPBF process. For simulating the growth of columnar grains, a thermal gradient of 1x10^5 K/cm and a cooling rate of 1x10^6 K/s was applied. I have used the mobility database MOBAL5 along with TCAL7. The following results were obtained, but I also observed some ‘error’ messages towards the end of the solidification.
I have the following questions:
1) How do I fix the ‘error’ messages towards the end of simulations and if there are any more corrections required? How can I validate this structure?
2) How do I simulate the growth of equiaxed grains, since in Addalloy the equiaxed grains are formed due to the nucleation by Al3X precipitates, so which phase and phase interactions do I need to consider? I tried the simulation using Al3X phase (Al3X phase is only available through TCAL7 and not in MOBAL5 database) but couldn’t achieve any results. Is there any example I can refer to for this case?
Thanks. Best Regards
Desai
Good day. I have been working on the solidification of an alloy (Al-Mg-Zr) by LPBF process. For simulating the growth of columnar grains, a thermal gradient of 1x10^5 K/cm and a cooling rate of 1x10^6 K/s was applied. I have used the mobility database MOBAL5 along with TCAL7. The following results were obtained, but I also observed some ‘error’ messages towards the end of the solidification.
I have the following questions:
1) How do I fix the ‘error’ messages towards the end of simulations and if there are any more corrections required? How can I validate this structure?
2) How do I simulate the growth of equiaxed grains, since in Addalloy the equiaxed grains are formed due to the nucleation by Al3X precipitates, so which phase and phase interactions do I need to consider? I tried the simulation using Al3X phase (Al3X phase is only available through TCAL7 and not in MOBAL5 database) but couldn’t achieve any results. Is there any example I can refer to for this case?
Thanks. Best Regards
Desai