Paper Title:
Automated Twin Identification Technique for Use with Electron Backscatter Diffraction
  Abstract

Historically, twinning classification has been obtained by optical microscopy, bulk x-ray and neutron diffraction, and transmission electron microscopy (TEM). Recent research has shown that automated electron backscatter diffraction (EBSD) can be used to quantify twin content and thereby greatly improve the reliability of twinning statistics. An automated twin identification technique for use with EBSD has facilitated a greater understanding of deformation twinning in materials. The key features of this automated framework are the use of the crystallographic definition of twin relationships, and the correct identification of the parent orientation in a parent/twin pair. The complex nature of the parent/twin interactions required the use of a voting scheme to correctly identify parent orientations. In those few cases where the voting scheme was unable to determine parent orientation (< 2%) the algorithm allows for manual selection. Twin area fractions are categorized by operative twin systems along with secondary and tertiary twinning. These statistics are reported for deformation and annealing twin populations in deformed a-zirconium and asannealed 316L stainless steel, respectively. These improved twin statistics can help provide insight into the effect of deformation processes on microstructural evolution, as well as provide validation of plasticity models for materials that exhibit deformation twinning.

  Info
Periodical
Materials Science Forum (Volumes 495-497)
Edited by
Paul Van Houtte and Leo Kestens
Pages
191-196
DOI
10.4028/www.scientific.net/MSF.495-497.191
Citation
B.L. Henrie, T. A. Mason, J.F. Bingert, "Automated Twin Identification Technique for Use with Electron Backscatter Diffraction ", Materials Science Forum, Vols. 495-497, pp. 191-196, 2005
Online since
September 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Y. Wang, Wen Zhu Shao, Liang Zhen, L. Lin, Y.X. Cui
Abstract:The nucleation and development of dynamic recrystallization (DRX) in hot deformed superalloy Inconel 718 during uniaxial compression were...
1297
Authors: Jia Jiang, Andrew Godfrey, Qing Liu
Abstract:In order to improve the formability of magnesium alloys at low temperatures, a thorough understanding of the twinning behaviour is required....
627
Authors: Nobuo Nakada, Hidetoshi Ito, Yoshikazu Matsuoka, Toshihiro Tsuchiyama, Setsuo Takaki
Abstract:Deformation-induced martensite preferentially nucleates at the twin boundary between matrix austenite and deformation twin in 316 type...
99
Authors: Małgorzata Perek-Nowak, Marek S. Szczerba
Abstract:In the paper the concept of structure refinement due to mechanical twinning is discussed. It is postulated that the process of structure...
61
Authors: Christophe Schuman, L. Bao, J.S. Lecomte, M.J. Philippe, Y. Zhang, X. Zhao, Liang Zuo, J.M. Raulot, C. Esling
Chapter 2: Deformation
Abstract:A new selection criterion to explain the activation of the twinning variant is proposed. This criterion is based on the calculation of the...
229