Correlation between the crystallography and morphology of proeutectoid Widmanstaetten cementite precipitates

Journal Article · Fri Nov 26 04:00:00 EST 1999 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(99)00323-7· OSTI ID:20006415

Mangan, M A; Kral, M V; Spanos, G

Electron backscatter diffraction was used in conjunction with deep etching to examine the relationship between the crystallography and three-dimensional morphology of cementite precipitates in an Fe-1.34 wt% C-13.1 wt% Mn steel. Orientation relationships (ORs) between more than 200 proeutectoid Widmanstaetten cementite precipitates and the surrounding austenite were determined to be on or very near either the well-known Pitsch OR the Farooque-Edmonds OR. Scanning electron microscopy of the same specimens after deep etching was used to determine the three-dimensional morphology of each of the precipitates for which an OR was determined. These precipitates could be identified as either monolithic plates or conglomerates of laths. Results show that monolithic plates consistently exhibit the Pitsch OR and conglomerates of laths have the Farooque-Edmonds OR, indicating that the precipitate morphologies are dictated by their orientation relationships.

• Research Organization: Naval Research Lab., Washington, DC (US)
• OSTI ID: 20006415
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 17 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CEMENTITE
CRYSTALLOGRAPHY
ELECTRON DIFFRACTION
MANGANESE STEELS
MICROSTRUCTURE
MORPHOLOGY
PRECIPITATION
SCANNING ELECTRON MICROSCOPY