skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of carbon content on solidification behaviors and morphological characteristics of the constituent phases in Cr-Fe-C alloys

Abstract

A combination of transmission electron microscopy, electron backscatter diffraction and wavelength dispersive spectrum has been used to identify crystal structure, grain boundary characteristic and chemical composition of the constituent phases in Cr-Fe-C alloys with three different carbon concentrations. Depending on the three different carbon concentrations, the solidification structures are found to consist of primary {alpha}-phase and [{alpha} + (Cr,Fe){sub 23} C{sub 6}] eutectic in Cr-18.4Fe-2.3 C alloy; primary (Cr,Fe){sub 23} C{sub 6} and [{alpha} + (Cr,Fe){sub 23} C{sub 6}] eutectic in Cr-24.5Fe-3.8 C alloy and primary (Cr,Fe){sub 7} C{sub 3} and [{alpha} + (Cr,Fe){sub 7} C{sub 3}] eutectic in Cr-21.1Fe-5.9 C alloy, respectively. The grain boundary analysis is useful to understand growth mechanism of the primary phase. The morphologies of primary (Cr,Fe){sub 23} C{sub 6} and (Cr,Fe){sub 7} C{sub 3} carbides are faceted structures with polygonal shapes, different from primary {alpha}-phase with dendritic shape. The primary (Cr,Fe){sub 23} C{sub 6} and (Cr,Fe){sub 7} C{sub 3} carbides with strong texture exist a single crystal structure and contain a slight low angle boundary, resulting in the polygonal growth mechanism. Nevertheless, the primary {alpha}-phase with relative random orientation exhibits a polycrystalline structure and comprises a massive high-angle boundary, caused by the dendritic growthmore » mechanism. - Highlights: Black-Right-Pointing-Pointer Microstructures of the as-clad Cr-based alloys are characterized by TEM. Black-Right-Pointing-Pointer EBSD technique has been use to characterize the grain boundary of primary phases. Black-Right-Pointing-Pointer We examine transitions in morphology about the primary phases. Black-Right-Pointing-Pointer Morphologies of primary carbides are polygonal different from primary {alpha}-phase. Black-Right-Pointing-Pointer Solidification structures rely on C concentrations in Cr-Fe-C alloy.« less

Authors:
;  [1];  [2];  [1]
  1. Department of Materials Science and Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, Taiwan (China)
  2. Department of Materials Science and Engineering, National Cheng Kung University, Taiwan (China)
Publication Date:
OSTI Identifier:
22066396
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 62; Journal Issue: 12; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BACKSCATTERING; CARBON; CARBON ADDITIONS; CHEMICAL COMPOSITION; CHROMIUM ALLOYS; CRYSTAL GROWTH; CRYSTAL STRUCTURE; ELECTRON DIFFRACTION; EUTECTICS; GRAIN BOUNDARIES; IRON ALLOYS; MONOCRYSTALS; MORPHOLOGY; POLYCRYSTALS; SOLIDIFICATION; TEXTURE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY SPECTRA

Citation Formats

Lin, Chi-Ming, Lai, Hsuan-Han, Kuo, Jui-Chao, and Wu, Weite. Effect of carbon content on solidification behaviors and morphological characteristics of the constituent phases in Cr-Fe-C alloys. United States: N. p., 2011. Web. doi:10.1016/J.MATCHAR.2011.09.007.
Lin, Chi-Ming, Lai, Hsuan-Han, Kuo, Jui-Chao, & Wu, Weite. Effect of carbon content on solidification behaviors and morphological characteristics of the constituent phases in Cr-Fe-C alloys. United States. https://doi.org/10.1016/J.MATCHAR.2011.09.007
Lin, Chi-Ming, Lai, Hsuan-Han, Kuo, Jui-Chao, and Wu, Weite. 2011. "Effect of carbon content on solidification behaviors and morphological characteristics of the constituent phases in Cr-Fe-C alloys". United States. https://doi.org/10.1016/J.MATCHAR.2011.09.007.
@article{osti_22066396,
title = {Effect of carbon content on solidification behaviors and morphological characteristics of the constituent phases in Cr-Fe-C alloys},
author = {Lin, Chi-Ming and Lai, Hsuan-Han and Kuo, Jui-Chao and Wu, Weite},
abstractNote = {A combination of transmission electron microscopy, electron backscatter diffraction and wavelength dispersive spectrum has been used to identify crystal structure, grain boundary characteristic and chemical composition of the constituent phases in Cr-Fe-C alloys with three different carbon concentrations. Depending on the three different carbon concentrations, the solidification structures are found to consist of primary {alpha}-phase and [{alpha} + (Cr,Fe){sub 23} C{sub 6}] eutectic in Cr-18.4Fe-2.3 C alloy; primary (Cr,Fe){sub 23} C{sub 6} and [{alpha} + (Cr,Fe){sub 23} C{sub 6}] eutectic in Cr-24.5Fe-3.8 C alloy and primary (Cr,Fe){sub 7} C{sub 3} and [{alpha} + (Cr,Fe){sub 7} C{sub 3}] eutectic in Cr-21.1Fe-5.9 C alloy, respectively. The grain boundary analysis is useful to understand growth mechanism of the primary phase. The morphologies of primary (Cr,Fe){sub 23} C{sub 6} and (Cr,Fe){sub 7} C{sub 3} carbides are faceted structures with polygonal shapes, different from primary {alpha}-phase with dendritic shape. The primary (Cr,Fe){sub 23} C{sub 6} and (Cr,Fe){sub 7} C{sub 3} carbides with strong texture exist a single crystal structure and contain a slight low angle boundary, resulting in the polygonal growth mechanism. Nevertheless, the primary {alpha}-phase with relative random orientation exhibits a polycrystalline structure and comprises a massive high-angle boundary, caused by the dendritic growth mechanism. - Highlights: Black-Right-Pointing-Pointer Microstructures of the as-clad Cr-based alloys are characterized by TEM. Black-Right-Pointing-Pointer EBSD technique has been use to characterize the grain boundary of primary phases. Black-Right-Pointing-Pointer We examine transitions in morphology about the primary phases. Black-Right-Pointing-Pointer Morphologies of primary carbides are polygonal different from primary {alpha}-phase. Black-Right-Pointing-Pointer Solidification structures rely on C concentrations in Cr-Fe-C alloy.},
doi = {10.1016/J.MATCHAR.2011.09.007},
url = {https://www.osti.gov/biblio/22066396}, journal = {Materials Characterization},
issn = {1044-5803},
number = 12,
volume = 62,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2011},
month = {Thu Dec 15 00:00:00 EST 2011}
}