scholarly journals Characterization of the Influence of Grain Boundary Character on Oxidation of Nickel Using Atom Probe Tomography

2013 ◽  
Vol 19 (S2) ◽  
pp. 1012-1013
Author(s):  
S.L. Welsh ◽  
J.L. Evans
Keyword(s):  
Grain Boundary ◽  
Atom Probe Tomography ◽  
Atom Probe ◽  
Boundary Character ◽  
Grain Boundary Character

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

scholarly journals Influence of Grain Boundary Character and Annealing Time on Segregation in Commercially Pure Nickel

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Shery L. Welsh ◽  
Monica Kapoor ◽  
Olivia D. Underwood ◽  
Richard L. Martens ◽  
Gregory B. Thompson ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Annealing Time ◽  
Electron Backscatter Diffraction ◽  
Atom Probe ◽  
Pure Nickel ◽  
Polycrystalline Materials ◽  
Boundary Character ◽  
Grain Boundary Character ◽  
Commercially Pure

Commercially pure nickel (Ni) was thermomechanically processed to promote an increase in Σ3 special grain boundaries. Engineering the character and chemistry of Σ3 grain boundaries in polycrystalline materials can help in improving physical, chemical, and mechanical properties leading to improved performance. Type-specific grain boundaries (special and random) were characterized using electron backscatter diffraction and the segregation behavior of elements such as Si, Al, C, O, P, Cr, Mg, Mn, B, and Fe, at the atomic level, was studied as a function of grain boundary character using atom probe tomography. These results showed that the random grain boundaries were enriched with impurities to include metal oxides, while Σ3 special grain boundaries showed little to no impurities at the grain boundaries. In addition, the influence of annealing time on the concentration of segregants on random grain boundaries was analyzed and showed clear evidence of increased concentration of segregants as annealing time was increased.

An atom probe tomography study of grain boundary segregation in nanocrystalline Ni-W

2005 ◽  
Vol 903 ◽  
Author(s):  
Andrew Detor ◽  
Michael K. Miller ◽  
Christopher A. Schuh
Keyword(s):  
Grain Boundary ◽  
Atom Probe Tomography ◽  
Boundary Segregation ◽  
Atom Probe ◽  
Solute Segregation ◽  
Grain Boundary Segregation ◽  
Distribution Analysis ◽  
Grain Sizes ◽  
Composition Fluctuations ◽  
20 Nm

AbstractAtom probe tomography is used to observe the solute distribution in electrodeposited nanocrystalline Ni-W alloys with three different grain sizes (3, 10, and 20 nm) and the results are compared with atomistic computer simulations. The presence of grain boundary segregation is confirmed by detailed analysis of composition fluctuations in both experimental and simulated structures, and its extent quantified by a frequency distribution analysis. In contrast to other nanocrystalline alloys, the present Ni-W alloys exhibit only a subtle amount of solute segregation to the intergranular regions. This finding is consistent with quantitative predictions for these alloys based upon a thermodynamic model of grain boundary segregation.

scholarly journals Influence of Grain Boundary Character on Creep Void Formation in Alloy 617

2009 ◽  
Vol 40 (12) ◽  
pp. 2803-2811 ◽  
Author(s):  
Thomas Lillo ◽  
James Cole ◽  
Megan Frary ◽  
Scott Schlegel
Keyword(s):  
Grain Boundary ◽  
Void Formation ◽  
Alloy 617 ◽  
Boundary Character ◽  
Grain Boundary Character

Atom probe crystallography: Characterization of grain boundary orientation relationships in nanocrystalline aluminium

2011 ◽  
Vol 111 (6) ◽  
pp. 493-499 ◽  
Author(s):  
Michael P. Moody ◽  
Fengzai Tang ◽  
Baptiste Gault ◽  
Simon P. Ringer ◽  
Julie M. Cairney
Keyword(s):  
Grain Boundary ◽  
Atom Probe ◽  
Orientation Relationships ◽  
Boundary Orientation

scholarly journals Atom Probe Tomography Characterization of Engineered Oxide Multilayered Structures

2015 ◽  
Vol 21 (S3) ◽  
pp. 845-846
Author(s):  
M. I. Nandasiri ◽  
N. Madaan ◽  
A. Devaraj ◽  
J. Bao ◽  
Z. Xu ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Multilayered Structures

Impact of grain boundary character on grain rotation

2014 ◽  
Vol 80 ◽  
pp. 141-148 ◽  
Author(s):  
Luis A. Barrales-Mora ◽  
Jann-Erik Brandenburg ◽  
Dmitri A. Molodov
Keyword(s):  
Grain Boundary ◽  
Grain Rotation ◽  
Boundary Character ◽  
Grain Boundary Character
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