Abstract
This paper elucidated the determining role of grain boundary types/misorientations on formation of intragranular globular austenite, which had random orientation or large deviation from the parent austenite, in a high-strength low-alloy bainitic steel during reaustenitization. Results revealed that packet and block boundaries with large misorientations were beneficial for nucleation of intragranular globular austenite grains, as well as the prior austenite grain boundaries, resulting in significant refinement of final austenite grains.
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