Grain boundary ridges slow dawn grain boundary motion: In-situ observation

2014 ◽  
Vol 124 ◽  
pp. 24-27 ◽  
Author(s):  
Vera Sursaeva ◽  
Alena Gornakova ◽  
Faina Muktepavela
Keyword(s):  
Grain Boundary ◽  
In Situ Observation ◽  
Boundary Motion ◽  
Grain Boundary Motion

Motion of Crystal/Crystal and Crystal/Amorphous Interfaces

1990 ◽  
Vol 183 ◽  
Author(s):  
J. L. Batstone
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Grain Boundary ◽  
Boundary Motion ◽  
High Temperature Annealing ◽  
Thermally Activated ◽  
Transmission Electron ◽  
Grain Boundary Motion

AbstractMotion of ordered twin/matrix interfaces in films of silicon on sapphire occurs during high temperature annealing. This process is shown to be thermally activated and is analogous to grain boundary motion. Motion of amorphous/crystalline interfaces occurs during recrystallization of CoSi2 and NiSi2 from the amorphous phase. In-situ transmission electron microscopy has revealed details of the growth kinetics and interfacial roughness.

In Situ EBSP Observations of Recrystallization in Commercial Purity Aluminum

2007 ◽  
Vol 558-559 ◽  
pp. 223-228 ◽  
Author(s):  
Katsura Kajihara
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Early Stage ◽  
Boundary Motion ◽  
Commercial Purity ◽  
Solute Content ◽  
In Situ Observations ◽  
Commercial Purity Aluminum ◽  
Grain Boundary Motion

This study presents in-situ EBSP observations of recrystallization in commercial purity aluminum sheets with different concentrations of solutes and different states of precipitation. The in-situ observations demonstrate clearly the behaviors of the nucleation and growth of recrystallized grains, and the movements of grain boundaries at an early stage of recrystallization. The high mobility of grain boundaries neighboring the deformed matrix was generally observed presumably due to strain-induced grain boundaries migration. The grain boundary motion was also found to strongly depend to the solute content level. These in-situ observations provide important evidence to show that the behaviors of grain boundary motion at an early stage of recrystallization leads to the grain size distribution and the curvature of grain boundaries after the primary recrystallization.

Study of Deformation Behavior of Ultrafine-grained Materials Through in Situ Nanoindentation in a Transmission Electron Microscope

2005 ◽  
Vol 20 (7) ◽  
pp. 1735-1740 ◽  
Author(s):  
M. Jin ◽  
A.M. Minor ◽  
D. Ge ◽  
J.W. Morris
Keyword(s):  
Electron Microscope ◽  
Grain Boundary ◽  
Transmission Electron Microscope ◽  
Deformation Behavior ◽  
Boundary Migration ◽  
Boundary Motion ◽  
Transmission Electron ◽  
Ultrafine Grained ◽  
Grain Boundary Motion

The mechanical properties of ultrafine-grained and nanograined materials have received a great deal of recent attention because of their unusual and promising values. However, some of the most important mechanisms of deformation remain unclear. In this work, the deformation behavior of ultrafine-grained Al films and ultrafine-grained Fe is studied through in situ nanoindentation in a transmission electron microscope. Deformation-induced coarsening by grain boundary migration was observed in the ultrafine-grained Al films during deformation at room temperature, whereas no grain boundary motion was found in ultrafine-grained Fe. The lack of grain boundary motion in Fe was attributed to the pinning effect of nano-sized particles at the Fe grain boundaries.

Effect of Triple Junctions on Grain Boundary and Grain Growth Kinetics in Aluminium - 10 ppm Magnesium Sheet

2004 ◽  
Vol 467-470 ◽  
pp. 777-782 ◽  
Author(s):  
D. Mattissen ◽  
D. Kirch ◽  
Dmitri A. Molodov ◽  
Lasar S. Shvindlerman ◽  
Günter Gottstein
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Boundary Motion ◽  
Triple Junctions ◽  
Marked Influence ◽  
Von Neumann ◽  
Grain Growth Kinetics ◽  
Grain Boundary Motion ◽  
Unique Relationship

The motion and geometry of connected grain boundary systems with triple junctions in aluminium -10 ppm magnesium was investigated in-situ with a special designed SEM heating stage. The results show that triple junctions can have a marked influence on grain boundary motion. The grain area change with annealing time was from a hot stage in the SEM. An analysis of the experimental data reveals that there is no unique relationship between growth rate and the number n of grain sides (Von Neumann-Mullins relation). This is attributed to the effect of triple junction drag on grain growth.

Stress Assisted Grain Growth in Ultrafine and Nanocrystalline Aluminum Revealed by in-situ TEM

2008 ◽  
Vol 1086 ◽  
Author(s):  
Frederic Mompiou ◽  
Marc Legros ◽  
Daniel Caillard
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Dislocation Motion ◽  
In Situ Tem ◽  
Boundary Motion ◽  
Fine Grain ◽  
Nanocrystalline Aluminum ◽  
Grain Boundary Motion

AbstractIn-situ straining experiments on nanocrystalline (nc) and ultra fine grain (UFG) Aluminum were performed at room and intermediate temperatures. Both materials exhibit significant stress assisted grain growth. The strain induced by grain boundary motion has been measured in UFG Al, and was found to be on the order of a few percents. These results cannot be interpreted solely within the framework of Displacement Shift Complete (DSC) dislocation motion. We propose here that GB motion occurs via both shuffling and secondary DSC dislocation motion.

In situ observation of multiple parallel (1 1 1) twin boundary formation from step-like grain boundary during Si solidification

2020 ◽  
Vol 13 (10) ◽  
pp. 105501
Author(s):  
Kuan-Kan Hu ◽  
Kensaku Maeda ◽  
Keiji Shiga ◽  
Haruhiko Morito ◽  
Kozo Fujiwara
Keyword(s):  
Grain Boundary ◽  
Twin Boundary ◽  
In Situ Observation ◽  
Boundary Formation

Coupled grain boundary motion in a nanocrystalline grain boundary network

2011 ◽  
Vol 65 (2) ◽  
pp. 151-154 ◽  
Author(s):  
M. Velasco ◽  
H. Van Swygenhoven ◽  
C. Brandl
Keyword(s):  
Grain Boundary ◽  
Boundary Motion ◽  
Grain Boundary Motion

Influence of Al/Cu content on grain boundary diffusion in Nd-Fe-B magnet via in-situ observation

2019 ◽  
Vol 37 (4) ◽  
pp. 398-403 ◽  
Author(s):  
Xinghua Cheng ◽  
Jian Li ◽  
Lei Zhou ◽  
Tao Liu ◽  
Xiaojun Yu ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
In Situ Observation ◽  
Cu Content
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