Andrea Di Schino


The microstructural evolution of a quenched and tempered medium-C micro-alloyed steel during tempering is analyzed The steel was heat treated in order to develop fully martensitic microstructures after quenching with different prior austenite grain sizes (AGS).

Main results can be summarized as below:

  • A very poor effect of AGS on packet size is found.
  • High-angle boundary grains do not significantly grow after tempering; on the contrary, low-angle grain boundaries (cells) move, fully justifying the hardness evolution with tempering temperature. 


martensite; microstructure; packets; cells; tempering

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IČO 00 397 610

EV 5174/15

p-ISSN 1335-1532, e-ISSN 1338-1156