The variants of the orientation relationship between austenite and cementite in Fe-30wt%Mn-1.0wt%C alloy

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(94)90068-X· OSTI ID:143911

Yang, K H; Choo, W ^[1]

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1. Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of). Dept. of Electronic Materials Engineering

The morphology in cementite precipitation and the orientation relationship between cementite plates and austenite matrix on aging of Fe-30wt%Mn-1.0wt%C alloy have been investigated by transmission electron and optical microscopies. On aging at 550 C, Widmanstaetten-like cementite plates having the Pitsch orientation relationship (OR) were precipitated within the austenite matrix. But on aging at 700 C, colonies composed of cellular cementite and austenite plates were dominantly precipitated and grew out of grain boundaries. The latter cementite plates also preserved the Pitsch OR with the austenite counterparts. From the consideration of atomic habit plane relationships the authors deduced 4 different variants of the Pitsch OR. Only two of them could be identified from the transmission electron microscope (TEM) selected area diffraction (SAD) patterns. In the optical micrographs, all four variants respectively with their own easy growth direction of the cementite plates were distinguished.

• OSTI ID: 143911
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 1 Vol. 42; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON ADDITIONS
GRAIN ORIENTATION
IRON BASE ALLOYS
MANGANESE ALLOYS
MORPHOLOGY