Re: some qustions of recrystallisation
Posted: Mon Apr 12, 2021 9:20 am
Dear Kamran,
I am still struggling to understand the physical background of the process which you describe. What I understand is that you assume that there are two competitive processes: the recrystallisation of martensite (i.e. nucleation and growth of new martensite grains, with a reX-energy lower than the threshold value, inside the old deformed martensite) on one side, and austenite reversion on the other side. Both processes overlap and are incomplete, so that you end up with a mixture of recrystallized martensite, unrecrystallized martensite, and austenite.
In order to have grain boundaries between recrystallized martensite and unrecrystallized martensite in the end, which are not moving any more, you could consider one of the three mechanisms I described above.
But it could also be possible that you do not have these boundaries because there is reversed austenite between the recrystallized and unrecrystallized martensite. In this case, you only need to define the critical reX-energy for nucleation of the new martensite grains such that it is reached only in few of the deformed martensite grains.
Do you have experimental evidence of the partially recrystallized and partially reversed nature of the material?
Bernd
I am still struggling to understand the physical background of the process which you describe. What I understand is that you assume that there are two competitive processes: the recrystallisation of martensite (i.e. nucleation and growth of new martensite grains, with a reX-energy lower than the threshold value, inside the old deformed martensite) on one side, and austenite reversion on the other side. Both processes overlap and are incomplete, so that you end up with a mixture of recrystallized martensite, unrecrystallized martensite, and austenite.
In order to have grain boundaries between recrystallized martensite and unrecrystallized martensite in the end, which are not moving any more, you could consider one of the three mechanisms I described above.
But it could also be possible that you do not have these boundaries because there is reversed austenite between the recrystallized and unrecrystallized martensite. In this case, you only need to define the critical reX-energy for nucleation of the new martensite grains such that it is reached only in few of the deformed martensite grains.
Do you have experimental evidence of the partially recrystallized and partially reversed nature of the material?
Bernd