Measurement of plastic strain of polycrystalline material by electron backscatter diffraction

Kamaya, Masayuki; Wilkinson, Angus J.; Titchmarsh, J.M.

doi:10.1016/j.nucengdes.2004.11.006

Cited by 215 publications

(123 citation statements)

References 7 publications

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“…Strain assessment was carried out by local misorientation approach (Kamaya et al, 2005) and represented by Kernel Average Misorientation (KAM) parameter. According to its definition, value of KAM parameter is obtained in following way: for a given data point the average misorientation between the data point and all of its neighbors is calculated (exclude misorientations greater than some prescribed value -5° in this case).…”

Section: Methods Of Investigationmentioning

confidence: 99%

The Effect of Aluminum Content on the Microstructure and Cavitation Wear of Feal Intermetallic Alloys

Jasionowski

Zasada

Polkowski

2014

Acta Mechanica Et Automatica

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Abstract:Intermetallic-based alloys (so called intermetallics) of the Fe-Al binary system are modern construction materials, which in recent decades have found application in many branches of the power, chemical and automotive industries. High resistance of FeAl based alloys to cavitational erosion results first of all from their high hardness in the as-cast state, large compressive stresses in the material, as well as homogeneous structure. In the present paper, the effect of aluminum content on the microstructure, texture and strain implemented upon cavitation wear of FeAl intermetallic alloys, have been analyzed by field emission gun scanning electron microscopy (FEG SEM) and electron backscatter diffraction (EBSD) analysis. Obtained results of structural characterization indicates that with increasing aluminium content effects of orientation randomization (weakening of <100>//ND casting texture), grain refinement and rising of mechanical strenght (and so cavitational resistance) take place.

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Section: Methods Of Investigationmentioning

confidence: 99%

The Effect of Aluminum Content on the Microstructure and Cavitation Wear of Feal Intermetallic Alloys

Jasionowski

Zasada

Polkowski

2014

Acta Mechanica Et Automatica

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“…The degree of plastic strain and the associated stored energy are very important for material scientists to study the growth rate of stress corrosion cracking (SCC) [24] and the driving force of recrystallization [1], respectively. Changes in the IQ value and in local orientation have been used to study the strain and stored energy [1,24,25].…”

Section: Strain and Stored Energymentioning

confidence: 99%

“…Changes in the IQ value and in local orientation have been used to study the strain and stored energy [1,24,25]. IQ value, the quality of the diffraction patterns, indicates the distortion degree of crystal lattices in the diffraction patterns [26].…”

Section: Strain and Stored Energymentioning

confidence: 99%

Application of EBSD technique to ultrafine grained and nanostructured materials processed by severe plastic deformation: Sample preparation, parameters optimization and analysis

Chen

Hjelen

Roven

2012

Transactions of Nonferrous Metals Society of China

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`A bstract: With the help of FESEM, high resolution electron backscatter diffraction can investigate the grains/subgrains as small as a few tens of nanometers with a good angular resolution (~0.5?. Fast development of EBSD speed (up to 1100 patterns per second) contributes that the number of published articles related to EBSD has been increasing sharply year by year. This paper reviews the sample preparation, parameters optimization and analysis of EBSD technique, emphasizing on the investigation of ultrafine grained and nanostructured materials processed by severe plastic deformation (SPD). Detailed and practical parameters of the electropolishing, silica polishing and ion milling have been summarized. It is shown that ion milling is a real universal and promising polishing method for EBSD preparation of almost all materials. There exists a maximum value of indexed points as a function of step size. The optimum step size depends on the magnification and the board resolution/electronic step size. Grains/subgrains and texture, and grain boundary structure are readily obtained by EBSD. Strain and stored energy may be analyzed by EBSD.

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“…Misorientation between neighboring points is a parameter derived from the measured orientation, and is used to quantify the degree of plastic strain induced in a material. [1][2][3][4][5] However, the measurement of crystal orientation has an error of 0.1-1 depending on various factors such as the number of pixels of the CCD camera used to capture EBSD patterns, 6) parameters for data processing for identifying the orientation from obtained EBSD patterns and the plastic strain. [7][8][9] The magnitude of the error becomes relatively large for a small misorientation.…”

Section: Introductionmentioning

confidence: 99%

A Smoothing Filter for Misorientation Mapping Obtained by EBSD

Kamaya¹

2010

Mater. Trans.

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Electron backscatter diffraction in conjunction with scanning electron microscopy is used to assess local misorientation. However, measurement errors cause the distribution of misorientation to be scattered. To reduce the errors in local misorientation identification and obtain a smooth map, a data processing procedure is proposed. By taking the average of the crystal orientation of surrounding points, the distribution of the local misorientation became smoother and clearer. Moreover, the obtained local misorientation was shown to be valid for quantitatively evaluating the degree of plastic strain induced in Type 316 stainless steel.

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Measurement of plastic strain of polycrystalline material by electron backscatter diffraction

Cited by 215 publications

References 7 publications

The Effect of Aluminum Content on the Microstructure and Cavitation Wear of Feal Intermetallic Alloys

The Effect of Aluminum Content on the Microstructure and Cavitation Wear of Feal Intermetallic Alloys

Application of EBSD technique to ultrafine grained and nanostructured materials processed by severe plastic deformation: Sample preparation, parameters optimization and analysis

A Smoothing Filter for Misorientation Mapping Obtained by EBSD

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