Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 17, Issue 7, Pages 843-846Publisher
I O M COMMUNICATIONS LTD INST MATERIALS
DOI: 10.1179/026708301101510627
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The influence of boron on the hot ductility of C-Mn-Al-Cr steel has been investigated. At < 980 C M(CB)(3) precipitated out and about half of the boron content was in solution in austenite at > 900 degrees C. It was found that solute boron atoms segregate to austenite grain boundaries and occupy the vacancies induced by deformation. This prevents the formation and propagation of microcracks at boundaries and results in improved hot ductility and a reduced dynamic recrystallisation temperature. MST/4819.
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