In-situ observation of cooperative grain boundary sliding and migration in the nano-twinned nanocrystalline-Au thin-films

2020 ◽  
Vol 180 ◽  
pp. 97-102 ◽  
Author(s):  
Qizhen Li ◽  
Lihua Wang ◽  
Jiao Teng ◽  
Xiaolu Pang ◽  
Xiaodong Han ◽  
...  
Keyword(s):  
Thin Films ◽  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
In Situ Observation ◽  
Boundary Sliding ◽  
Au Thin Films ◽  
And Migration

Recrystallization and Grain Growth in Rocks and Minerals

2004 ◽  
Vol 467-470 ◽  
pp. 545-550 ◽  
Author(s):  
David J. Prior ◽  
Michel Bestmann ◽  
Angela Halfpenny ◽  
Elisabetta Mariani ◽  
Sandra Piazolo ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Grain Boundary Sliding ◽  
Data Sets ◽  
Nucleation Process ◽  
Ebsd Data ◽  
Boundary Sliding ◽  
And Migration

Misorientation analysis, using EBSD data sets, has enabled us to constrain better recrystallization mechanisms in rocks and minerals. Observed microstructures are not explicable in terms of recovery, boundary bulging and migration alone. We have to invoke either a nucleation process (physics unknown) or grain rotations that are not related to grain or boundary crystallography. Such rotations can occur by diffusion accommodated grain boundary sliding and this mechanism explains best the microstructure and texture of recrystallized grains in some rocks.

Tribological Behavior of Mg-Mg2Si In Situ Composite

2012 ◽  
Vol 710 ◽  
pp. 401-406
Author(s):  
Kumaraswamy Kaliamma Ajith Kumar ◽  
Uma Thanu Subramonia Pillai ◽  
Bellambettu Chandrasekhara Pai ◽  
Madhusudan Chakraborty
Keyword(s):  
Elevated Temperature ◽  
Wear Rate ◽  
Grain Boundary ◽  
Tribological Behavior ◽  
Grain Boundary Sliding ◽  
Dry Sliding ◽  
Boundary Sliding ◽  
Si Content ◽  
State Processing

Mg-Mg2Si in-situ composites by the addition of Si in Mg have become more attractive since the Mg2Si phase impedes the grain boundary sliding at elevated temperature because of its inherent properties which greatly improve the heat and wear resistances. In the present work, Mg-Mg2Si composites have been prepared by the liquid state processing with different amount of silicon additions. The microstructure and dry sliding tribological behavior of the composites have been studied. SEM studies reveal the wear mechanisms involved in these composites. The results indicate that wear rate of the composites is a function of Mg2Si content in the composite. The effect of Mg2Si morphology and distribution on the overall mechanism is also discussed.

Sign in / Sign up

Export Citation Format

Share Document