Crystalline structure and grain boundary identification in nanocrystalline aluminum using K-means clustering

2020 ◽  
Vol 28 (6) ◽  
pp. 065009
Author(s):  
Nicolás Amigo
Keyword(s):  
Grain Boundary ◽  
Crystalline Structure ◽  
Boundary Identification ◽  
Nanocrystalline Aluminum

scholarly journals Grain boundary segregation and intermetallic precipitation in coarsening resistant nanocrystalline aluminum alloys

2019 ◽  
Vol 165 ◽  
pp. 698-708 ◽  
Author(s):  
A. Devaraj ◽  
W. Wang ◽  
R. Vemuri ◽  
L. Kovarik ◽  
X. Jiang ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Grain Boundary ◽  
Boundary Segregation ◽  
Grain Boundary Segregation ◽  
Nanocrystalline Aluminum

scholarly journals Slip transfer through a general high angle grain boundary in nanocrystalline aluminum

2007 ◽  
Vol 91 (11) ◽  
pp. 111914 ◽  
Author(s):  
C. Brandl ◽  
E. Bitzek ◽  
P. M. Derlet ◽  
H. Van Swygenhoven
Keyword(s):  
Grain Boundary ◽  
High Angle ◽  
Slip Transfer ◽  
Nanocrystalline Aluminum

Microstructure of Rapidly Solidified Melt-Spun Ribbon in AlCoCrFeNi2.1 Eutectic High-Entropy Alloys

2016 ◽  
Vol 879 ◽  
pp. 1350-1354 ◽  
Author(s):  
Takeshi Nagase ◽  
Mamoru Takemura ◽  
Mitsuaki Matsumuro
Keyword(s):  
Grain Boundary ◽  
Rapid Solidification ◽  
Crystalline Structure ◽  
Xrd Analysis ◽  
Solidification Structure ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Rapidly Solidified

The microstructure of rapidly solidified melt-spun ribbon in AlCoCrFeNi2.1 eutectic high entropy alloys (EHEAs) was investigated for clarifying the effect of rapid solidification on the constituent phases and microstructure of specimens formed through solidification. XRD analysis indicates that the melt-spun ribbons were composed of a mixture of fcc and bcc phases. The rapidly solidified melt-spun ribbon shows a fine poly-crystalline structure with fcc matrix phase and crystalline precipitates in the grain boundary, indicating that the solidification structure in the melt-spun ribbon was significantly different from that obtained by conventional casting processes.

Grain Boundary Internal Friction Peak in Nanocrystalline Aluminum Studied by Continuously Changing-Temperature

2014 ◽  
Vol 1004-1005 ◽  
pp. 3-9
Author(s):  
Jian Ning Wei ◽  
Li Ling Zhou ◽  
Jian Qiang Liu ◽  
Xue Yun Zhou ◽  
Wei Jun Xie
Keyword(s):  
Internal Friction ◽  
Grain Boundary ◽  
Dynamic Modulus ◽  
Vibration Measurement ◽  
Heating Process ◽  
Internal Friction Peak ◽  
Low Frequencies ◽  
Exponential Factor ◽  
Nanocrystalline Aluminum ◽  
Bulk Nanocrystalline

The bulk nanocrystalline aluminum are fabricated by cryomilling and hot-press sintering. The internal friction (IF) and relative dynamic modulus measurements in the nanocrystalline aluminum (Al) have been made using a multifunction internal friction apparatus (MFIFA) at low frequencies (0.2-3.0 Hz) over the wide temperature ranges from room temperature to 450 °C, while continuously changing-temperature forced vibration measurement. In the temperature spectrums of IF during heating process and cooling process, a distinct IF peak is found. Corresponding to the IF peak, the relative dynamic modulus decreases rapidly. The peak temperature of the IF peak shifts towards higher temperature with increasing frequency, i.e., the IF peak seem due to the thermal activated relaxation process. The IF peak is a grain boundary IF peak, which is associated with the diffusive grain boundary of Al/Al. Its activation energy has been calculated to be 2.21±0.04×10-19J and the pre-exponential factor is 10-14s in IF measurements.

scholarly journals The role of confinement on stress-driven grain boundary motion in nanocrystalline aluminum thin films

2012 ◽  
Vol 112 (12) ◽  
pp. 124313 ◽  
Author(s):  
Daniel S. Gianola ◽  
Diana Farkas ◽  
Martin Gamarra ◽  
Mo-rigen He
Keyword(s):  
Thin Films ◽  
Grain Boundary ◽  
Boundary Motion ◽  
Nanocrystalline Aluminum ◽  
Grain Boundary Motion
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