Atomic scale investigation on the distribution of boron in medium carbon steels by atom probe tomography and EELS

摘要

The medium carbon (0.5 wt% C) steels containing various boron contents were studied to observe thedistribution of boron using atom probe tomography and electron energy loss spectroscopy. APTrevealed the segregation of boron atoms at retained austenite for 100 ppm boron added steels and thetrapped carbon atoms at micro-twins for 50 ppm boron treated steels. Moreover, it was also found thatboron was randomly distributed for 20 ppm boron added steels regardless of the interactions betweencarbon and boron.