Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 45A, Issue 8, Pages 3173-3178Publisher
SPRINGER
DOI: 10.1007/s11661-014-2303-4
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Funding
- Peaslee Steel Manufacturing Research Center (PSMRC)
- National Science Foundation [DMR-0723128]
- Materials Research Center
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The presence of athermal epsilon- and alpha-martensite (alpha') in the as-cast structure of a Fe-0.08C-1.95Si-15.1Mn-1.4Al-0.017N alloy has been revealed by electron backscattered diffraction analysis. The alloy exhibited two athermal martensitic transformations described by gamma -> alpha' and gamma -> epsilon -> alpha'. The Shoji-Nishiyama orientation relationship was observed between gamma-austenite and epsilon-martensite, while alpha-martensite nucleated from gamma-austenite exhibited a Kurdjumov-Sachs orientation relationship. Six crystallographic variants of alpha-martensite consisting of three twin-related variant pairs were observed in epsilon-bands. A planar parallelism of {0001}epsilon || {110}alpha' and a directional relation of lying within 1 deg of existed for these variants. (C) The Minerals, Metals & Materials Society and ASM International 2014
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