Grain coarsening of a specific magnesium alloy during tensile testing has been observed which not only increased the hardness of the material but very surprisingly the texture got weaker. Please explain the reason behind this mechanism?
Are you absolutely sure it coarsened during the test? Sounds unlikely to me if the test was at room temperature.
I am 100% sure that grains are coarsened during the tensile testing as increase in grain size is observed after the test. The test was performed at room temperature. but very surprisingly the micro hardness was increased instead of grain coarsening. Please guide what is the mechanism involved for such behavior?
You should research restoration mechanisms, like recovery, recrystallisation and grain growth.
Could u give little more details like testing temperature, cross-head velocity/nominal strain rate, initial and final texture.......u need to look at dynamic recrystallization and secondary grain growth mechanisms in u systems....also need to consider post-tensile test cooling rate.
It could be due strain martensitic transformation , or it could be due to the finishing temperature , adjusting the fininshing temperature might help
You might have to provide a little more information regarding your testing conditions ; e.g. temperature. While stress assisted coarsening of secondary phases is a known phenomenon, however without additional details - specific to your material and experiment- it will be very difficult to provide any satisfactory answer .
- Badges
- Science topic
- Similar topics
- Engineering
- Materials Engineering
- Annealing
- Metallurgy