Globule-Globule Interactions during Deformation in Semi-Solid Al-Cu Using Time-Resolved X-Ray Tomography

2012 ◽  
Vol 192-193 ◽  
pp. 179-184
Author(s):  
Kristina Maria Kareh ◽  
Peter D. Lee ◽  
Christopher M. Gourlay
Keyword(s):  
Solid Fraction ◽  
Three Dimensional ◽  
Solid Alloy ◽  
Three Dimensional Imaging ◽  
Time Resolved ◽  
X Ray ◽  
Analysis Techniques ◽  
Solid Deformation ◽  
Fundamental Understanding ◽  
Semi Solid

Optimising semi-solid processing and accurately modelling semi-solid deformation requires a fundamental understanding of the globule-scale mechanisms that cause the macroscopic rheological response. In this work, apparatus and analysis techniques are being developed for the time-resolved, three-dimensional imaging of semi-solid alloy deformation. This paper overviews synchrotron X-ray tomography results on globular Al-15wt%Cu deformed at 0.7 solid fraction using extrusion. The globule-globule interactions in response to load were quantified in terms of the response of individual globules with respect to globule translation, rotation, and deformation. The potential of time-resolved X-ray tomography in the study of semi-solid alloy deformation is then discussed.

Semi-Solid Deformation of Al-Fe Alloy Prepared by Electromagnetic Stirring

2010 ◽  
Vol 152-153 ◽  
pp. 726-733 ◽  
Author(s):  
Bo Liu ◽  
Xiao Guang Yuan ◽  
Hong Jun Huang ◽  
Shao Hua Zhang
Keyword(s):  
Strain Rate ◽  
Solid Fraction ◽  
Deformation Temperature ◽  
Strain Softening ◽  
Testing Machine ◽  
Materials Testing ◽  
Solid Alloy ◽  
Solid Deformation ◽  
Semi Solid ◽  
Peak Value

The semi-solid compression behaviors and the microstructure of Al-Fe alloy prepared by electromagnetic stirred were investigated in the strain rate range of 5×10-3 s-1 to 5×10-1 s-1 and the temperature range of 610 to 640°C on INSTRON-5500R materials testing machine. The experimental results showed that, during the semi-solid deformation of Al-Fe alloy，the peak value of true stress decreased with elevating deformation temperature. As the deformation increased, the stress peak value of the high solid fraction alloy was tending upwards, and that of the low solid fraction was tending downwards. The peak increased with increasing the strain rate. Al-Fe alloy was sensitive to strain rate during semi-solid compression. The strain softening phenomenon would happen. The smaller strain rate, the longer softening process, the stress falling was more slowly. The strain softening was a reason that the semi-solid alloy structure was instability during deformation. The semi-solid deformational behaviors of Al-Fe alloy was bound up with deformation temperature, strain rate, and deforming extent.

scholarly journals Three-dimensional Imaging of Nanoscale Internal Structure by Coherent X-ray Diffraction Microscope

Materia Japan ◽  
2007 ◽  
Vol 46 (12) ◽  
pp. 827-827
Author(s):  
Yoshinori Nishino ◽  
Yukio Takahashi ◽  
Tetsuya Ishikawa ◽  
Eiichiro Matsubara
Keyword(s):  
Internal Structure ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Three Dimensional Imaging ◽  
X Ray

scholarly journals Three-dimensional imaging of chemical phase transformations at the nanoscale with full-field transmission X-ray microscopy

2011 ◽  
Vol 18 (5) ◽  
pp. 773-781 ◽  
Author(s):  
Florian Meirer ◽  
Jordi Cabana ◽  
Yijin Liu ◽  
Apurva Mehta ◽  
Joy C. Andrews ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
Full Field ◽  
X Ray ◽  
Chemical Phase

Three-dimensional imaging of dislocations by X-ray diffraction laminography

2012 ◽  
Vol 101 (24) ◽  
pp. 244103 ◽  
Author(s):  
D. Hänschke ◽  
L. Helfen ◽  
V. Altapova ◽  
A. Danilewsky ◽  
T. Baumbach
Keyword(s):  
Three Dimensional ◽  
X Ray Diffraction ◽  
Three Dimensional Imaging ◽  
X Ray

scholarly journals Three-Dimensional Imaging of Nerve Tissue by X-Ray Phase-Contrast Microtomography

1999 ◽  
Vol 76 (1) ◽  
pp. 98-102 ◽  
Author(s):  
F. Beckmann ◽  
K. Heise ◽  
B. Kölsch ◽  
U. Bonse ◽  
M.F. Rajewsky ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Three Dimensional ◽  
Nerve Tissue ◽  
Three Dimensional Imaging ◽  
X Ray

scholarly journals Three-Dimensional Imaging of Biological Tissue by Cryo X-Ray Ptychography

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
S. H. Shahmoradian ◽  
E. H. R. Tsai ◽  
A. Diaz ◽  
M. Guizar-Sicairos ◽  
J. Raabe ◽  
...  
Keyword(s):  
Biological Tissue ◽  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
X Ray
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