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  1. Mett87

    Acicular ferrite or Bainite

    the micrograph below is of a medium carbon steel, the grain size looks too coarse to be bainite - could this be acicular ferrite produced by a 2 stage cooling?
  2. Mett87

    Grain Boundary Carbide Network In725

    I have a section of In725 that appears to have a nearly continuous carbide network at the grain boundaries. Is this typical for this grade? Heat treatment was:- 1040c for 11hr/air cool 730c for 12hr/furnace cool to 620c hold for 8hr/air cool Hardness 37HRC Thanks in advance.
  3. Mett87

    Inconel 625 etching

    Hi, Could anybody help with a suitable etchant for revealing grain strucutre for grain size determination in Inconel 625, I'm guessing mixed acids is the way to go? I am aware a bit trial and error would be the best solution but as I am waiting for the components I thought I would ask the...
  4. Mett87

    Carbides in Austenite phase

    Hi I have a samples of F55 duplex stainless steel that appears to have a high percentage of carbide/intermetallic phase in the austenite grains, could this be down to a poor solution treat after forging?
  5. Mett87

    Vickers hardness calc

    Just a quick one, when inputing values into excel spreadsheet to calculate microvickers hardness ive noticed it to be about 50 points high. The machine is reading correct and also if i input the d1 and d2 values from the test block cert they also read around 50 points high. I dont see how this...

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