08-11-2018, 03:43 AM
Mr. Grepper, thanks for sharing your very interesting results. 
The term memory metal or shape-memory alloy is used for material which returns to initial shape when heated. Most often used are nickel-titanium alloys which undergo reversible transition between martensite and austenite phases.
In carbon steels this process is not reversible and for this reason steels do not have the memory properties.
In my opinion relaxation of residual stress, induced through the mechanisms you have mentioned, would also be able to explain the deformation component of an edge dulling.
Jan
The term memory metal or shape-memory alloy is used for material which returns to initial shape when heated. Most often used are nickel-titanium alloys which undergo reversible transition between martensite and austenite phases.
In carbon steels this process is not reversible and for this reason steels do not have the memory properties.
In my opinion relaxation of residual stress, induced through the mechanisms you have mentioned, would also be able to explain the deformation component of an edge dulling.
Jan