New understanding of the role of coincidence site lattice boundaries in abnormal grain growth of aluminium alloy

2015 ◽  
Vol 95 (4) ◽  
pp. 220-228 ◽  
Author(s):  
Chang-Soo Park ◽  
Hyung-Ki Park ◽  
Hyung-Seok Shim ◽  
Tae-Wook Na ◽  
Chan-Hee Han ◽  
...  
Keyword(s):  
Aluminium Alloy ◽  
Grain Growth ◽  
Coincidence Site Lattice ◽  
Abnormal Grain Growth ◽  
Site Lattice

A Role of Low Energy Grain Boundaries in the Abnormal Grain Growth in Fe-3%Si Alloy

2011 ◽  
Vol 127 ◽  
pp. 89-94 ◽  
Author(s):  
Ye Chao Zhu ◽  
Jiong Hui Mao ◽  
Fa Tang Tan ◽  
Xue Liang Qiao
Keyword(s):  
Grain Boundaries ◽  
Grain Growth ◽  
Electron Backscatter Diffraction ◽  
Dominant Role ◽  
Coincidence Site Lattice ◽  
Diffraction Method ◽  
Abnormal Grain Growth ◽  
Low Energy ◽  
Backscatter Diffraction

Low energy grain boundaries were considered to be important in abnormal grain growth by theoretical deduction. The disorientation angles and coincidence site lattice grain boundaries distribution of more than 20 Goss grains and their neighboring matrix grains in primary recrystallized Fe-3%Si alloy were investigated using an electron backscatter diffraction method. It was found that the frequency of low energy grain boundaries of Goss grains which are more likely to abnormally grow are higher than their neighboring matrix grains, which indicated that low energy grain boundaries play a dominant role in the abnormal grain growth of Fe-3%Si alloy. The result meets well with the abnormal grain growth theory.

scholarly journals Role of β(FeAl) nanoparticles in abnormal grain growth in the annealing of cast Cu-Al-Mn-Fe shape memory alloys

2020 ◽  
Vol 30 (4) ◽  
pp. 510-516
Author(s):  
Shuiyuan Yang ◽  
Xinyu Qing ◽  
Jixun Zhang ◽  
Lipeng Guo ◽  
Shen Hong ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Grain Growth ◽  
Abnormal Grain Growth

Investigation of the Sintering Behavior of Ultrapure α-Alumina Containing Low Amounts of SiO2 or CaO

2006 ◽  
Vol 317-318 ◽  
pp. 1-6 ◽  
Author(s):  
Nicolas Louet ◽  
Thierry Epicier ◽  
Gilbert Fantozzi
Keyword(s):  
Grain Boundaries ◽  
Grain Growth ◽  
Oxygen Vacancies ◽  
Glassy Phase ◽  
Intermediate Stage ◽  
Abnormal Grain Growth ◽  
Sintering Behavior ◽  
Critical Temperatures ◽  
Heterogeneous Microstructures

The target of this work is to investigate the effect of small additions of SiO2 or CaO on the sintering behavior and the microstructure of an ultrapure α-alumina compound. The sintering behavior has been investigated through extensive dilatometric study. SiO2 additions lead to a significant decrease in shrinkage rate during the intermediate stage of sintering whereas CaO is beneficent to densification. It has been found that during this stage which corresponds to the maximum of densification rate, grain boundaries diffusion controls densification through oxygen vacancies. The study of the densification behavior under different atmospheres help us to explain the role of the additives in agreement with electroneutrality equations. S.E.M. investigations confirm the well know correlation between doping and heterogeneous microstructures. After doping with SiO2 or CaO, abnormal grain growth appears at temperatures corresponding to the lowest eutectics given by Al2O3-SiO2 or Al2O3-CaO phase diagrams. H.R.T.E.M. observations show that below the critical temperatures for abnormal grain growth, additives enrichment is observed near grain boundaries (GBs). Above these temperatures, glassy phase for SiO2-doping and calciumhexaluminate (CA6) for CaO-doping are present at grain boundaries.

Accumulation of coincidence site lattice boundaries during grain growth

2003 ◽  
Vol 19 (6) ◽  
pp. 683-687 ◽  
Author(s):  
G. N. Hassold ◽  
E. A. Holm ◽  
M. A. Miodownik
Keyword(s):  
Grain Growth ◽  
Coincidence Site Lattice ◽  
Site Lattice

Role of abnormal grain growth on the ferroelectric properties of SrBi2Ta2O9 thin films fabricated by R.F. Magnetron sputtering

1998 ◽  
Vol 21 (1-4) ◽  
pp. 419-428 ◽  
Author(s):  
Choelhwyi Bae ◽  
Jeon-Kook Lee ◽  
Si-Hyung Lee ◽  
Yoon Baek Park ◽  
Hyung-Jin Jung
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Grain Growth ◽  
Ferroelectric Properties ◽  
Abnormal Grain Growth

Role of subsurface Goss-oriented grains in abnormal grain growth in Fe-3% Si steel

2021 ◽  
pp. 111381
Author(s):  
Seil Lee ◽  
Hyun-Seok Ko ◽  
Kyuseok Han ◽  
Se-Jong Kim
Keyword(s):  
Grain Growth ◽  
Abnormal Grain Growth

scholarly journals The role of abnormal grain growth on solid-state dewetting kinetics

2014 ◽  
Vol 81 ◽  
pp. 304-314 ◽  
Author(s):  
Galit Atiya ◽  
Dominique Chatain ◽  
Vissarion Mikhelashvili ◽  
Gadi Eisenstein ◽  
Wayne D. Kaplan
Keyword(s):  
Solid State ◽  
Grain Growth ◽  
Abnormal Grain Growth

The Role of the Milling Step on the Sintering Behaviour of Monazite Powder LaPO4 - Densification and Resulting Microstructure

2006 ◽  
Vol 45 ◽  
pp. 633-638 ◽  
Author(s):  
Damien Bregiroux ◽  
Fabienne Audubert ◽  
Didier Bernache-Assollant
Keyword(s):  
Grain Growth ◽  
Abnormal Grain Growth ◽  
Milling Parameters ◽  
Attrition Milling ◽  
Sintering Behaviour

Sintering behaviour of monazite powder was investigated as a function of the powder milling conditions. To this aim, two techniques were used: attrition-milling and mixer-milling. We show that it is of prime importance to control all the milling parameters in order to obtain controlled microstructure and to avoid abnormal grain growth or residual large porosity.

Abnormal Grain Growth Induced by Boundary Segregation of Solute Atoms

2007 ◽  
Vol 558-559 ◽  
pp. 1093-1099 ◽  
Author(s):  
Seong Gyoon Kim ◽  
Won Tae Kim ◽  
Yong Bum Park
Keyword(s):  
Grain Growth ◽  
Boundary Segregation ◽  
Phase Field Model ◽  
Solute Drag ◽  
Abnormal Grain Growth ◽  
Dispersed Particles ◽  
Segregation Effect ◽  
Solute Atoms ◽  
2D And 3D

Abnormal grain growth (AGG) proceeds in case that normal grain growth is inhibited. It has long been known that the inhibition involves finely dispersed particles and/or the development of specific textures. There is another strong obstacle against the grain boundary (GB) motion; the solute atoms can reduce their energy by moving from the bulk into a GB. Resultant interaction between the solute atoms and a GB makes the GB motion more difficult. However the role of the GB segregation effect on AGG has not been clarified. In this study we simulate the 2D and 3D grain growth accompanying boundary segregation of solute atoms by using a phase-field model. It is shown that the segregation plays an important role on the occurrence of AGG. The boundary-segregation-induced AGG can take place when the average driving force of grain growth approaches a critical condition for pinning-depinning transition in solute-drag atmosphere.

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