Specifications

Title: Correlation between grain boundary misorientation and M23C 6 precipitation behaviors
in a wrought Ni-based superalloy
Authors: Tang, Bin1 ; Jiang, Li1 ; Hu, Rui1 ; Li, Qi2/;;;;
Author affiliation: 1 State Key Laboratory of Solidification Processing, Northwestern
Polytechnical University, 127 Youyi Xilu, Xi'an, Shaanxi 710072, China
2 School of Material Science and Engineering, Xi'An University of Technology, 5 South Jinhua
Road, Xi'an, Shaanxi 710048, China
Corresponding author: Tang, B. ([e-mail])
Source title: Materials Characterization
Abbreviated source title: Mater Charact
Volume: 78
Issue date: 2013
Publication year: 2013
Pages: 144-150
Language: English
ISSN: 10445803
CODEN: MACHEX
Document type: Journal article (JA)
Publisher: Elsevier Inc., 360 Park Avenue South, New York, NY 10010, United States
Abstract: The correlation between the grain boundary misorientation and the precipitation
behaviors of intergranular M23C6 carbides in a wrought Ni-Cr-W superalloy was investigated by
using the electron backscattered diffraction (EBSD) technique. It was observed that the grain
boundaries with a misorientation angle less than 20, as well as all coincidence site lattice (CSL)
boundaries, are immune to precipitation of the M 23C6 carbides; in contrast, the random
high-angle grain boundaries with a misorientation angle of 20 -40 provide preferential
precipitation sites of the M23C6 carbides at the random high-angle grain boundaries with a
higher misorientation angle of 55 -60 /[2 2 3] turn to retard precipitation of M23C6 carbides
owing to their nature like the Σ3 grain boundaries and retard the precipitation of M23C6 carbides.
The low-angle and certain random grain boundary segments induced by twins were found to
interrupt the precipitation of the M23C6 carbides along the high-angle grain boundaries. © 2013
Elsevier Inc.
Number of references: 29
Main heading: Lasers
Controlled terms: Carbides - Electron diffraction - Grain boundaries - Nickel -
Superalloys - Superconducting materials
Uncontrolled terms: Coincidence site lattices - Electron back-scattered diffraction -
Grain boundary misorientation - High angle grain boundaries - Misorientation angle -
Ni-cr-w superalloys - Precipitation behavior - Random grain boundaries
Classification code: 932.2 Nuclear Physics - 812.1 Ceramics - 744.1 Lasers, General -
708.3 Superconducting Materials - 548.1 Nickel - 531.2 Metallography - 531
Metallurgy and Metallography
DOI: 10.1016/j.matchar.2013.02.006
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.