title: Performance of Dynamically Simulated Reference Patterns for Cross-Correlation Electron Backscatter Diffraction.
abstract: High-resolution (or "cross-correlation") electron backscatter diffraction analysis (HR-EBSD) utilizes cross-correlation techniques to determine relative orientation and distortion of an experimental electron backscatter diffraction pattern with respect to a reference pattern. The integrity of absolute strain and tetragonality measurements of a standard Si/SiGe material have previously been analyzed using reference patterns produced by kinematical simulation. Although the results were promising, the noise levels were significantly higher for kinematically produced patterns, compared with real patterns taken from the Si region of the sample. This paper applies HR-EBSD techniques to analyze lattice distortion in an Si/SiGe sample, using recently developed dynamically simulated patterns. The results are compared with those from experimental and kinematically simulated patterns. Dynamical patterns provide significantly more precision than kinematical patterns. Dynamical patterns also provide better estimates of tetragonality at low levels of distortion relative to the reference pattern; kinematical patterns can perform better at large values of relative tetragonality due to the ability to rapidly generate patterns relating to a distorted lattice. A library of dynamically generated patterns with different lattice parameters might be used to achieve a similar advantage. The convergence of the cross-correlation approach is also assessed for the different reference pattern types.
authors: 1Mechanical Engineering Department,Brigham Young University,Provo,UT 84602,USA.
authors: Brian E
authors: BE
authors: Jackson
authors: 1Mechanical Engineering Department,Brigham Young University,Provo,UT 84602,USA.
authors: Jordan J
authors: JJ
authors: Christensen
authors: 2Department of Materials Science and Engineering,Carnegie Mellon University,5000 Forbes Avenue,Pittsburgh,PA 15213,USA.
authors: Saransh
authors: S
authors: Singh
authors: 2Department of Materials Science and Engineering,Carnegie Mellon University,5000 Forbes Avenue,Pittsburgh,PA 15213,USA.
authors: Marc
authors: M
authors: De Graef
authors: 1Mechanical Engineering Department,Brigham Young University,Provo,UT 84602,USA.
authors: David T
authors: DT
authors: Fullwood
authors: 1Mechanical Engineering Department,Brigham Young University,Provo,UT 84602,USA.
authors: Eric R
authors: ER
authors: Homer
authors: 3Department of Material Science and Engineering,Ohio State University,2041 College Rd,Columbus,OH 43210,USA.
authors: Robert H
authors: RH
authors: Wagoner
keywords: HR-EBSD; cross-correlation EBSD; dynamical electron scattering; kinematical EBSD simulation; simulated electron backscatter diffraction