Orientation relationships between M[sub 2]C carbide and the austenite matrix in an Fe-Mn-Al-Mo-C alloy

Journal Article · Sat May 01 04:00:00 EDT 1993 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02657236· OSTI ID:6311589

Peng, Shang-Wen; Chou, Chang-Pin ^[1]

---

1. National Chiao Tung Univ., Taiwan (China)

M[sub 2]C carbides were observed to precipitate within the austenite matrix of an Fe-24.6Mn-6.6Al-3.1 Mo-1.0C alloy after quenching from 1200 C and aging at 750 C. By means of transmission electron microscopy (TEM) and diffraction techniques, the orientation relationships between M[sub 2]C (p) and the austenite ([gamma]) matrix were determined to be: (0001)p // (111)[gamma], (11[bar 2]0)p // (1[bar 1]0)[gamma], ([bar 1]100)p//(11[bar 2])[gamma]. M[sub 2]C carbide has been reported by many researchers to precipitate from the ferrite matrix or along austenite/ferrite boundaries in alloy steels containing Mo. However, little information concerning the formation of M[sub 2]C in the austenite matrix has been provided. This investigation presents the first evidence for the existence of M[sub 2]C carbide wholly within the austenite matrix and its relationship to the austenite. The energy-dispersive spectrometry (EDS) analyses were performed on M[sub 2]C carbides, and the results indicate that the solubility of the M[sub 2]C carbide for foreign atoms other than Mo is very limited.

• OSTI ID: 6311589
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 24:5; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
AGING
ALLOYS
ALUMINIUM ALLOYS
AUSTENITE
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MICROSCOPY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
ORIENTATION
PHASE STUDIES
PRECIPITATION
QUENCHING
SAMPLE PREPARATION
SCATTERING
SEPARATION PROCESSES
SOLUBILITY
SPECTROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY