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

This content will become publicly available on October 23, 2020

Title: Characterization of ordering in Fe-6.5%Si alloy using X-ray, TEM, and magnetic TGA methods

Abstract

Fe-6.5wt%Si steel surpasses the current extensively used Fe-3.2wt%Si steel in lower iron loss, higher permeability, and near zero magnetostriction. As a cost effective soft magnetic material, Fe-6.5wt%Si may find applications in motors, transformers, and electronic components. However, the brittleness of the alloy poses processing challenges. The brittleness in Fe-6.5wt%Si is attributed to the formation of ordered phases. Evaluation of the amount of ordered phases is important for the research and development of Fe-6.5wt%Si. This paper aims to find effective ways to evaluate the ordering degree through a comparison of various characterization techniques. In order to tune the ordering degree, various speeds were used to prepare Fe-6.5wt%Si samples via melt spinning. The varying wheel speed changes the cooling rate, which was confirmed by thermal imaging. In addition to the widely used TEM and normal theta-2theta X-ray diffraction methods, two quantitative methods were adopted for this Fe-6.5wt%Si system to study the ordering degree. One method is based on rotating crystal XRD technique, and the other is magnetic thermal analysis technique. Finally, these two methods effectively quantified the varying degree of ordering presented in the samples and were deemed more suitable than the TEM, normal theta-2theta XRD methods for Fe-Si due to theirmore » ease of sample preparation and short turn-around time.« less

Authors:
 [1];  [2];  [3];  [2];  [2];  [2];  [1];  [1];  [1]
  1. Ames Lab., Ames, IA (United States). Division of Materials Science and Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Material Science and Engineering
  2. Ames Lab., Ames, IA (United States). Division of Materials Science and Engineering
  3. Iowa State Univ., Ames, IA (United States). Dept. of Material Science and Engineering
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1573489
Alternate Identifier(s):
OSTI ID: 1577375
Report Number(s):
IS-J 10071
Journal ID: ISSN 1044-5803
Grant/Contract Number:  
EE0007794; AC02-07CH11358; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 158; Journal Issue: C; Journal ID: ISSN 1044-5803
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; silicon steel; ordering; melt spinning; transmission electron microscopy; magnetic thermal gravimetric analysis

Citation Formats

Ouyang, Gaoyuan, Jensen, Brandt, Macziewski, Chad R., Ma, Tao, Meng, Fangqiang, Lin, Qishen, Zhou, Lin, Kramer, Matt, and Cui, Jun. Characterization of ordering in Fe-6.5%Si alloy using X-ray, TEM, and magnetic TGA methods. United States: N. p., 2019. Web. doi:10.1016/j.matchar.2019.109973.
Ouyang, Gaoyuan, Jensen, Brandt, Macziewski, Chad R., Ma, Tao, Meng, Fangqiang, Lin, Qishen, Zhou, Lin, Kramer, Matt, & Cui, Jun. Characterization of ordering in Fe-6.5%Si alloy using X-ray, TEM, and magnetic TGA methods. United States. doi:10.1016/j.matchar.2019.109973.
Ouyang, Gaoyuan, Jensen, Brandt, Macziewski, Chad R., Ma, Tao, Meng, Fangqiang, Lin, Qishen, Zhou, Lin, Kramer, Matt, and Cui, Jun. Wed . "Characterization of ordering in Fe-6.5%Si alloy using X-ray, TEM, and magnetic TGA methods". United States. doi:10.1016/j.matchar.2019.109973.
@article{osti_1573489,
title = {Characterization of ordering in Fe-6.5%Si alloy using X-ray, TEM, and magnetic TGA methods},
author = {Ouyang, Gaoyuan and Jensen, Brandt and Macziewski, Chad R. and Ma, Tao and Meng, Fangqiang and Lin, Qishen and Zhou, Lin and Kramer, Matt and Cui, Jun},
abstractNote = {Fe-6.5wt%Si steel surpasses the current extensively used Fe-3.2wt%Si steel in lower iron loss, higher permeability, and near zero magnetostriction. As a cost effective soft magnetic material, Fe-6.5wt%Si may find applications in motors, transformers, and electronic components. However, the brittleness of the alloy poses processing challenges. The brittleness in Fe-6.5wt%Si is attributed to the formation of ordered phases. Evaluation of the amount of ordered phases is important for the research and development of Fe-6.5wt%Si. This paper aims to find effective ways to evaluate the ordering degree through a comparison of various characterization techniques. In order to tune the ordering degree, various speeds were used to prepare Fe-6.5wt%Si samples via melt spinning. The varying wheel speed changes the cooling rate, which was confirmed by thermal imaging. In addition to the widely used TEM and normal theta-2theta X-ray diffraction methods, two quantitative methods were adopted for this Fe-6.5wt%Si system to study the ordering degree. One method is based on rotating crystal XRD technique, and the other is magnetic thermal analysis technique. Finally, these two methods effectively quantified the varying degree of ordering presented in the samples and were deemed more suitable than the TEM, normal theta-2theta XRD methods for Fe-Si due to their ease of sample preparation and short turn-around time.},
doi = {10.1016/j.matchar.2019.109973},
journal = {Materials Characterization},
number = C,
volume = 158,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 23, 2020
Publisher's Version of Record

Save / Share: