Crystallography and morphology of Widmanstaetten cementite in austenite

Journal Article · Mon Aug 10 04:00:00 EDT 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00139-6· OSTI ID:651096

Zhang, M X; Kelly, P M ^[1]

---

1. Univ. of Queensland, Brisbane, Queensland (Australia). Dept. of Mining, Minerals and Materials Engineering

A totally new orientation relationship between Widmanstaetten cementite and austenite in Fe-Mn-C alloys has been obtained using convergent beam Kikuchi line diffraction patterns with an accuracy of approximately {+-}0.5{degree} or better. The new orientation relationship is: (0{bar 2}2){sub Z}{parallel}({ovr 11}1){sub A}; [100]{sub Z}{parallel}[112]{sub A}; [011]{sub Z}{parallel}[{bar 1}10]{sub A}. In terms of this variant of orientation relationship the experimentally determined habit plane is (0{bar 1}5){sub Z} 1.1{degree} from ({bar 2}01){sub A}. A recently developed concept of edge to edge matching of close packed planes along the good fit directions in these planes, has been used to explain the current and previously reported habit planes and orientation relationships. The good fit directions are normally close packed directions in the two phases.

• OSTI ID: 651096
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 13 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CEMENTITE
GRAIN BOUNDARIES
GRAIN ORIENTATION
MANGANESE STEELS
MORPHOLOGY
PRECIPITATION