A Study of Plastic Strain Before and on the Yield Plateau of Steel 08G2B by Correlation of Digital Images. Part II. Functioning of Flow Channels and Zones in them

The output of the ultramicrotomy process with its high strain levels is dependent upon the input, ie., the nature of the material being machined. Apart from the geometrical constraints offered by the rake and clearance faces of the tool, each material is free to deform in whatever manner necessary to satisfy its material structure and interatomic constraints. Noncrystalline materials appear to survive the process undamaged when observed in the TEM. As has been demonstrated however microtomed plastics do in fact suffer damage to the top and bottom surfaces of the section regardless of the sharpness of the cutting edge or the tool material. The energy required to seperate the section from the block is not easily propogated through the section because the material is amorphous in nature and has no preferred crystalline planes upon which defects can move large distances to relieve the applied stress. Thus, the cutting stresses are supported elastically in the internal or bulk and plastically in the surfaces. The elastic strain can be recovered while the plastic strain is not reversible and will remain in the section after cutting is complete.

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Comparison of Substructures Between Uniaxial and Biaxial Deformation in 1100-0 Aluminum

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100096989 ◽

1981 ◽

Vol 39 ◽

pp. 52-53

Author(s):

D. L. Rohr ◽

S. S. Hecker

Keyword(s):

Plastic Strain ◽

Cell Walls ◽

Room Temperature ◽

Mechanical Response ◽

Biaxial Tension ◽

Initial Deformation ◽

Uniaxial Deformation ◽

Biaxial Deformation ◽

Stress States ◽

Comprehensive Study

As part of a comprehensive study of microstructural and mechanical response of metals to uniaxial and biaxial deformations, the development of substructure in 1100 A1 has been studied over a range of plastic strain for two stress states.Specimens of 1100 aluminum annealed at 350 C were tested in uniaxial (UT) and balanced biaxial tension (BBT) at room temperature to different strain levels. The biaxial specimens were produced by the in-plane punch stretching technique. Areas of known strain levels were prepared for TEM by lapping followed by jet electropolishing. All specimens were examined in a JEOL 200B run at 150 and 200 kV within 24 to 36 hours after testing.The development of the substructure with deformation is shown in Fig. 1 for both stress states. Initial deformation produces dislocation tangles, which form cell walls by 10% uniaxial deformation, and start to recover to form subgrains by 25%. The results of several hundred measurements of cell/subgrain sizes by a linear intercept technique are presented in Table I.

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Reduction in size of digital images: does it lead to less detectability or loss of diagnostic information?

Dentomaxillofacial Radiology ◽

10.1038/sj.dmfr.4600329 ◽

1998 ◽

Vol 27 (2) ◽

pp. 93-96 ◽

Cited By ~ 12

Author(s):

C H Versteeg ◽

G C H Sanderink ◽

S R Lobach ◽

P F van der Stelt

Keyword(s):

Digital Images ◽

Diagnostic Information

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Development of a system for craniofacial analysis from monitor-displayed digital images

Dentomaxillofacial Radiology ◽

10.1038/sj.dmfr.4600420 ◽

1999 ◽

Vol 28 (2) ◽

pp. 123-126 ◽

Cited By ~ 28

Author(s):

E Gotfredsen ◽

J Kragskov ◽

A Wenzel

Keyword(s):

Digital Images

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Lamellar grains distribution and plastic strain heterogeneities in TiAI cast samples. Experiments and modelling

Matériaux & Techniques ◽

10.1051/mattech:2004008 ◽

2004 ◽

Vol 92 (1-2) ◽

pp. 69-76 ◽

Cited By ~ 2

Author(s):

L. Gélébart ◽

M. Bornert ◽

T. Bretheau ◽

D. Caldemaison ◽

J. Crépin ◽

...

Keyword(s):

Plastic Strain

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Authentication of Digital Image using Exif Metadata and Decoding Properties

International Journal of Scientific Research in Computer Science Engineering and Information Technology ◽

10.32628/cseit183815 ◽

2018 ◽

pp. 335-341 ◽

Cited By ~ 1

Author(s):

D. P. Gangwar ◽

Anju Pathania

Keyword(s):

Digital Image ◽

Digital Images ◽

Software Tools ◽

Robust Analysis

This work presents a robust analysis of digital images to detect the modifications/ morphing/ editing signs by using the image’s exif metadata, thumbnail, camera traces, image markers, Huffman codec and Markers, Compression signatures etc. properties. The details of the whole methodology and findings are described in the present work. The main advantage of the methodology is that the whole analysis has been done by using software/tools which are easily available in open sources.

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