Ti6Al4V
Posted: Mon Mar 30, 2020 8:05 pm
Dear everyone,
my object is the heat treatment of Ti6Al4V martensite microstructure obtained by additive manufacture. During additive manufacture, fine martensite needle-like structures of the alpha phase are created. Depending on the selected heat treatment temperature the martensite structure transforms into the laminar alpha phase and/or into the laminar beta phase, depending on the selected temperature. I know from the forum that martensite transformation is a challenge for the phase-field method.
To obtain my target I started with a lot of elliptic grains and use the misorientation option of MICRESS 6.2 to simulate the entangled structure. The transformation from martensite alpha was obtained by using the same phrase twice., martensite alpha phase and a second alpha phase. The growth of the new alpha phase and the beta phase was achieved by the seed undercooling option for nucleation.
It works more or less but the transformation from martensite alpha to alpha needs improvement since it is nucleation and not a transformation. I am sure that there are a lot of further tricks in MICRESS to improve my simulation, for example, the "add_to_grain" and "parent_grain" function. Unfortunately, I have no really an idea of how this works.
Do you have some tips for me?
Best regards,
Johann
my object is the heat treatment of Ti6Al4V martensite microstructure obtained by additive manufacture. During additive manufacture, fine martensite needle-like structures of the alpha phase are created. Depending on the selected heat treatment temperature the martensite structure transforms into the laminar alpha phase and/or into the laminar beta phase, depending on the selected temperature. I know from the forum that martensite transformation is a challenge for the phase-field method.
To obtain my target I started with a lot of elliptic grains and use the misorientation option of MICRESS 6.2 to simulate the entangled structure. The transformation from martensite alpha was obtained by using the same phrase twice., martensite alpha phase and a second alpha phase. The growth of the new alpha phase and the beta phase was achieved by the seed undercooling option for nucleation.
It works more or less but the transformation from martensite alpha to alpha needs improvement since it is nucleation and not a transformation. I am sure that there are a lot of further tricks in MICRESS to improve my simulation, for example, the "add_to_grain" and "parent_grain" function. Unfortunately, I have no really an idea of how this works.
Do you have some tips for me?
Best regards,
Johann