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On coarsening of cementite during tempering of martensitic steels

Author:
Hou, Ziyong  Babu, R. Prasath  Hedstrom, Peter  Odqvist, Joakim  


Journal:
MATERIALS SCIENCE AND TECHNOLOGY


Issue Date:
2020


Abstract(summary):

The coarsening of cementite in a martensitic Fe-1C-1Cr (wt-%) alloy upon tempering at 700 degrees C is investigated. When considering that the main location of cementite is at grain boundaries, classical coarsening theory can accurately predict the mean size evolution, while the predicted size distribution evolution disagrees with the experimentally observed log-normal distribution maintained throughout the whole tempering (5000 h). We conclude that classical theory of coarsening, as given by Lifshitz-Slyozov-Wagner and included in the Langer-Schwartz Kampmann-Wagner numerical approach for modelling precipitation reactions, is not fully adequate to simulate coarsening of cementite for tempering in practice.


Page:
887---893


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