I've been trying to run a Thermo-Calc one axis equilibrium calculation on some quaternary alloys in the TCHEA4 database. Most of the calculations work fine, but for some alloys it gets stuck in a loop (forever) where it is trying to find the start of a phase change. I can sometimes get it to run for these problematic alloys by setting the global test interval to 1 or by increasing the number of grid points for global minimization, but I don't want to have to fudge things like that. What is the reason the calculations are hanging and how can it be fixed reliably?
:
Phase Region from 651.989
11:35:58,357 INFO BCC_B2#1 SIGMA#1 SIGMA#2
11:35:58,478 INFO Global test at 5.80000E+02
11:35:59,482 INFO Backtracking to find phase change for SIGMA#3
11:35:59,617 INFO Global check of adding phase at 6.51989E+02
11:36:01,482 INFO Calculated 4 equilibria
11:36:01,483 INFO Phase Region from 651.989
11:36:01,484 INFO BCC_B2#1 SIGMA#1 SIGMA#2 SIGMA#3
11:36:01,557 INFO Global check of removing phase at 6.51989E+02
11:36:03,571 INFO Calculated 3 equilibria
11:36:03,572 INFO Phase Region from 651.989
11:36:03,572 INFO BCC_B2#1 SIGMA#1 SIGMA#2
11:36:03,710 INFO Global test at 5.80000E+02
11:36:05,276 INFO Backtracking to find phase change for SIGMA#3
11:36:05,477 INFO Global check of adding phase at 6.51989E+02
11:36:07,188 INFO Calculated 4 equilibria
11:36:07,189 INFO Phase Region from 651.989
11:36:07,189 INFO BCC_B2#1 SIGMA#1 SIGMA#2 SIGMA#3
11:36:07,275 INFO Global check of removing phase at 6.51989E+02
11:36:07,675 INFO Calculated 3 equilibria
11:36:07,675 INFO Phase Region from 651.989
11:36:07,676 INFO BCC_B2#1 SIGMA#1 SIGMA#2
11:36:07,800 INFO Global test at 5.80000E+02
11:36:09,098 INFO Backtracking to find phase change for SIGMA#3
11:36:09,318 INFO Global check of adding phase at 6.51989E+02
11:36:11,029 INFO Calculated 4 equilibria
11:36:11,030 INFO Phase Region from 651.989
11:36:11,031 INFO BCC_B2#1 SIGMA#1 SIGMA#2 SIGMA#3
11:36:11,096 INFO Global check of removing phase at 6.51989E+02
11:36:13,019 INFO Calculated 3 equilibria
11:36:13,020 INFO Phase Region from 651.989
11:36:13,021 INFO BCC_B2#1 SIGMA#1 SIGMA#2
This just continues without end.