An Investigation into the Cause of Inhomogeneous Distributions of Aluminium Nitrides in Silicon Steels

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Authors

Colleges, School and Institutes

Abstract

Two electrical steels containing 0.014 wt.% aluminium and 0.013-0.014 wt.% nitrogen were characterised to determine the operating recrystallisation mechanism following different heat treatment schedules. It was found that the operating recrystallisation mechanism depended on grain orientation with sub-grain coalescence and low-angle boundary movement occurring for {111} -oriented grains and high-angle boundary movement occurring for {110} -oriented grains in the narrow deformed bands. In addition, the number density of AlN precipitates (characterised using TEM) was larger in the {111}-oriented grains compared to the {110}-oriented grains. The higher number density of precipitates was due to the presence of dislocations remaining after recrystallisation. (C) 2002 Elsevier Science B.V. All rights reserved.

Details

Original languageEnglish
Pages (from-to)23-27
Number of pages5
JournalMaterials Science and Engineering A
Volume345
Issue number1-2
Early online date14 May 2002
Publication statusPublished - 25 Mar 2003