Paper Title:
Optical Grain Size Measurements: What is Being Measured? Comparative Study of Optical and EBSD Grain Sizes Determination in 2D Al Foil
  Abstract

Reflected light optical analysis and Electron Backscatter Diffraction (EBSD) analysis have been used to m easure grain sizes in 2D Al foil samples, annealed for different times. There are significant differences in the results of the two techniques. It is shown that in Al it is possible to detect boundaries in optical images down to a misorientation angle of 7-8º. Nevertheless, in most samples the critical angle of easy etching lies above 10º. The observed differences in grain size measurements between optical analysis and EBSD analysis can be largely attributed to three phenomena: (1) individual samples may behave slighty differently due to differences in the effectiveness of etching (2) the grain size is heterogeneous over large areas and (3) the effect of etching is not only a function of misorientation angle but also grain boundary plane. Despite these uncertainties, optical analysis seems to be reliable for analysis of processes in which mainly grain boundaries with misorientation angle of > 10º are involved i.e. grain growth.

  Info
Periodical
Materials Science Forum (Volumes 495-497)
Edited by
Paul Van Houtte and Leo Kestens
Pages
213-218
DOI
10.4028/www.scientific.net/MSF.495-497.213
Citation
S. Piazolo, V. G. Sursaeva, D. J. Prior, "Optical Grain Size Measurements: What is Being Measured? Comparative Study of Optical and EBSD Grain Sizes Determination in 2D Al Foil ", Materials Science Forum, Vols. 495-497, pp. 213-218, 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: Yool Kwon Oh, Je Se Choi
Abstract:This paper investigates on three-dimensional thermal deformation of aluminum casting tire mold applying metal casting method by numerical...
1043
Authors: Hong Zeng, Qi Gao, Wen Guang Zhang, Yan Li
Abstract:The three-dimensional parametric model of spiral bevel gear was built based on Pro/E, The parametric model was converted to Patran, and the...
1083
Authors: Li Na Huang
Chapter 2:Measurement of Size, Volume and Other Parameters
Abstract:We develop the research on macrograph grain size analysis method of tight gravel-rock, in allusion to the difficulty in conducting the grain...
51
Authors: Sheng Yang, Chen Chao Ma, Guo Feng Li, Rui Jie Wang
Chapter 1: Vibration Engineering
Abstract:As space industry and technology develop, the spacecraft structure systems become increasingly complex and the scales become much larger....
271
Authors: Jing Luo, Mutellip Ahmat, Qiang Gao, Li Chao Ren
Chapter 2: Mechanical Engineering and Engineering Design
Abstract:In this paper, the precise 3D model of the wind power increasing gear was set up by based on the parametric designing method of Pro/Program,...
447