Dresden 2011 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 23: Phase Transformations I

MM 23.4: Talk

Wednesday, March 16, 2011, 11:45–12:00, IFW D

Microstructural investigation and thermal stability of ball-milled Fe-Cu — •Catharina G. Wille and Tala’at Al-Kassab — King Abdullah University of Science and Technology (KAUST), Materials Science and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia

The microstructural changes upon heat treatment in ball-milled Fe-10at.%Cu powders after different milling times from 2 to 10h were observed by means of transmission electron microscopy (TEM). This heat treatment was performed isochronally inside a differential scanning calorimeter (DSC).

The heat release calculated from the DSC curves will be correlated to the observed microstructural changes. Additionally the positions of the exothermic peaks and the respective stored enthalpies will be compared to the ones obtained within earlier works and especially their conclusions on phase separation - accompanied by grain growth and strain release.

For the minority component copper as well as for the impurity oxygen the segregation and precipitation behaviour in connection with grain growth were investigated by atom probe tomography (APT).