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Grain boundary segregation in {l_angle}110{r_angle} symmetrical tilt bicrystals of an Fe-3%Si alloy

Journal Article · · Scripta Metallurgica et Materialia
 [1];  [2]; ; ;  [3]
  1. Nippon Steel Corp., Kitakyushu (Japan)
  2. Nippon Steel Corp., Chiba (Japan)
  3. Kyushu Univ., Fukuoka (Japan). Dept. of Material Science and Technology
+ Show Author Affiliations

Grain oriented silicon steel is characterized by the presence of a sharp {l_brace}110{r_brace} <001> texture, which is produced by secondary recrystallization. It has been pointed out that, in an Fe-3%Si alloy in which there were precipitates, the evolution of {l_brace}110{r_brace}<001> texture is associated with the special grain boundary migration characteristics of {Sigma}9 type coincidence boundaries. It has also been reported that, in Fe-3%Si alloys in which there were precipitates, evolutions of {l_brace}110{r_brace}<111>, {l_brace}110{r_brace}<227>, {l_brace}100{r_brace}<001> textures are associated with the special grain boundary migration characteristics of {Sigma}9, {Sigma}5 and {Sigma}7 type coincidence boundaries, respectively. On the other hand, auger electron spectroscopy has been used to investigate grain boundary segregation in <100> symmetrical tilt bicrystals of Fe-Si alloys containing phosphorus and carbon. The results showed that phosphorus and carbon segregated at grain boundaries. Segregation of silicon was not observed, probably because the segregation of phosphorus and carbon dominated at grain boundaries. In order to make the basic background of the selective grain boundary migration clear, the present authors have investigated the grain boundary segregation in Fe-3%Si alloys with <110> symmetric tilt-boundaries, using Auger electron spectroscopy. In this study, {Sigma}9 coincidence boundaries and general boundaries were prepared for the investigation.

OSTI ID:
39884
Journal Information:
Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 7 Vol. 32; ISSN SCRMEX; ISSN 0956-716X
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
AUGER ELECTRON SPECTROSCOPY
BICRYSTALS
CHEMICAL COMPOSITION
CRYSTAL GROWTH
GRAIN BOUNDARIES
HOT WORKING
IRON BASE ALLOYS
SAMPLE PREPARATION
SEGREGATION
SILICON ALLOYS
VACUUM MELTING