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  1. seep

    Lower hardness but same YS

    What I meant is that YS after annealing should get lower (as hardness), but in my case is the same for as-forged and annealed alloy (even if hardness decreases).
  2. seep

    Lower hardness but same YS

    Samples were first as-forged (higher hardness) and then annealed in 1000C and quenched in water. Yield strength was measured by compression test. If not in this case, what can be a general explanation of this phenomenon?
  3. seep

    Lower hardness but same YS

    Can someone explain me the possible reasons why after homogenization of an austenitic steel, I obtain smaller hardness (about 100HV smaller) but the same yield strength? For me it's not logical... Lower hardness is probably conencted with recrystallization and grain growth, but shouldn't it be...
  4. seep

    Hall-Petch law and hardness-yield strength correlation

    Last thing - is it possible that after short-time annealing at 1000C (homogenization), I would have smaller hardness but lower YS than for only forged samples? Grains are bigger so logically hardness gets lower, but YS and even shape of the stress-strain curve doesn't change.
  5. seep

    Hall-Petch law and hardness-yield strength correlation

    Thank you!
  6. seep

    Hall-Petch law and hardness-yield strength correlation

    Thanks for tips about the correlation between H and YS, I thought it is working for all metal alloys. I have relatively low YS (200MPa) and high %A (40$), so it will not be working in this case? Do you have any suggestions have can I explain that my slope of H-P law is different that in the...
  7. seep

    Hall-Petch law and hardness-yield strength correlation

    Hello everyone! I have a question: I am currently working on an austenitic steel and after applying Hall-Petch law, the slop of a curve (on HV vs d^-1/2 graph) is different than taken from the literature... How can I explain this? May it be connected with "k" coefficient? Another question...

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