scholarly journals Grain Refinement Efficiency in Commercial-Purity Aluminum Influenced by the Addition of Al-4Ti Master Alloys with Varying TiAl3 Particles

Materials ◽  
2016 ◽  
Vol 9 (11) ◽  
pp. 869 ◽  
Author(s):  
Jianhua Zhao ◽  
Jiansheng He ◽  
Qi Tang ◽  
Tao Wang ◽  
Jing Chen
Keyword(s):  
Grain Refinement ◽  
Commercial Purity ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
Commercial Purity Aluminum

scholarly journals The Interactions Between Oxide Film Inclusions and Inoculation Particles TiB2 in Aluminum Melt

2021 ◽  
Author(s):  
Jiawei Yang ◽  
Sarina Bao ◽  
Shahid Akhtar ◽  
Yanjun Li
Keyword(s):  
Grain Refinement ◽  
Master Alloy ◽  
Large Fraction ◽  
Oxide Films ◽  
Grain Refiner ◽  
Particle Sedimentation ◽  
Aluminum Melt ◽  
Refinement Efficiency ◽  
Long Time ◽  
Commercial Purity Aluminum

AbstractIn this work, a systematic study on the interactions between aluminum oxide films and TiB2 grain refiner particles and their effect on grain refinement behavior have been conducted. Oxide films were introduced into a commercial purity aluminum melt by adding AA 6061 alloy chips while the grain refiner particles were introduced by adding Al-3T-1B master alloy. Strong sedimentation of TiB2 grain refiner particles was observed in aluminum melt without chip addition during long-time settling. Most of the TiB2 particles were settled and accumulated at the bottom of crucible. In contrast, the sedimentation of TiB2 particles is much less in the melt with the addition of oxide films. A large fraction of TiB2 particles were found to be adhered to the oxide films located at the top part of the crucible, which inhibited the sedimentation of grain refiner particles. TP-1 type tests were also done to study the grain refinement efficiency of Al-3Ti-1B master alloy under different melt cleanliness and settling time. It is found that sedimentation of TiB2 particles greatly reduces the grain refinement efficiency. The introduction of oxide films seems to slightly alleviate the fading effect. This is owing to the strong adherence between the oxide films and TiB2 particles, which leads to a retardation of particle sedimentation.

Enhancing grain refinement efficiency and fading resistance of Al–B master alloys processed by equal channel angular pressing

2018 ◽  
Vol 33 (12) ◽  
pp. 1782-1788
Author(s):  
Kun Xia Wei ◽  
Yan Wei Zhang ◽  
Wei Wei ◽  
Xian Liu ◽  
Qing Bo Du ◽  
...  
Keyword(s):  
Grain Refinement ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
Image Position

Abstract

scholarly journals Effect of Inclusion and Filtration on Grain Refinement Efficiency of Aluminum Alloy

2022 ◽  
Author(s):  
Jiawei Yang ◽  
Yijiang Xu ◽  
Sarina Bao ◽  
Shahid Akhtar ◽  
Ulf Tundal ◽  
...  
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
Oxide Films ◽  
Pilot Scale ◽  
Ceramic Foam ◽  
Grain Refiner ◽  
Aluminum Melt ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
And Performance

AbstractIt is well known that the filtration efficiency of ceramic foam filters (CFF) on aluminum melt can be significantly reduced by the addition of grain refiner particles under a high inclusion load. Also, it is usually considered that the filtration process has little impact on grain refinement efficiency. In this work, the influence of inclusions and filtration on the grain refinement effect of AA 6060 alloy has been studied. This was done through TP-1 type solidification experiments where the aluminum melt prior to and after the filter during a pilot-scale filtration test was investigated. In the experiments, 80 PPi CFFs were used to filtrate aluminum melt with an ultra-high inclusion load and two addition levels of Al–3Ti–1B master alloys. It is found that both inclusions and filtration significantly reduce the grain refinement efficiency of the grain refiner master alloys. A detailed characterization of the used filters shows that the reduction of grain refinement efficiency is due to the strong adherence of TiB2 particles to the oxide films, which are blocked by the CFF during filtration. A grain size prediction model based on deterministic nucleation mechanisms and dendritic growth kinetics has been applied to calculate the solidification grain size and estimate the loss of effective grain refiner particles during filtration. It is shown that due to the strong adherence between TiB2 particles and oxide films in the melt, the high addition level of aluminum chips also has an influence on reducing the grain refinement efficiency of aluminum melt without filtration. The results of this study extended our understanding of the behavior and performance of inoculant particles in CFF and their interactions with the inclusions.

scholarly journals Ultra Grain Refinement of Commercial Purity Aluminum by a Multi-Stack ARB Process

2002 ◽  
Vol 66 (5) ◽  
pp. 470-475 ◽  
Author(s):  
Seong-Hee Lee ◽  
Hajime Inagaki ◽  
Hiroshi Utsunomiya ◽  
Yoshihiro Saito ◽  
Tetsuo Sakai
Keyword(s):  
Grain Refinement ◽  
Commercial Purity ◽  
Commercial Purity Aluminum

Effect of Fe on grain refinement of commercial purity aluminum

2006 ◽  
Vol 27 (9) ◽  
pp. 794-798 ◽  
Author(s):  
Yijie Zhang ◽  
Naiheng Ma ◽  
Hongzhan Yi ◽  
Songchun Li ◽  
Haowei Wang
Keyword(s):  
Grain Refinement ◽  
Commercial Purity ◽  
Commercial Purity Aluminum

Comparation about Refining Efficiency to Microstructure of AZ31 Magnesium Alloy for Sr Master Alloys

2015 ◽  
Vol 816 ◽  
pp. 498-503
Author(s):  
Ren Ju Cheng ◽  
Bo Liu ◽  
Bin Jiang ◽  
Su Qin Luo ◽  
Qing Shan Yang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Magnesium Alloys ◽  
Az31 Magnesium Alloy ◽  
Refining Efficiency ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
Refinement Effect ◽  
Cast Microstructure ◽  
Better Than

In the present work, the influence of Al-Sr and Mg-Sr master alloys on the as-cast microstructure of the AZ31 magnesium alloy was investigated,and the refinement efficiencies of both master alloys were also analyzed and compared. The research results indicate that both the Al-Sr and Mg-Sr master alloys have obvious refinement effect on the as-cast microstructure of the AZ31 magnesium alloy, and the refinement efficiency of the Mg-Sr master alloys was better than that of the Al-Sr master alloys. The mechanisms for the differences of grain refinement efficiency between Al-Sr and Mg-Sr master alloys on the AZ31 magnesium alloys were also discussed.

scholarly journals Development of New Oxide Based Master Alloys and their Grain Refinement Potency in Aluminium Alloys

2015 ◽  
Vol 828-829 ◽  
pp. 23-28 ◽  
Author(s):  
Vadakke Madam Sreekumar ◽  
N. Hari Babu ◽  
Dmitry G. Eskin ◽  
Z. Fan
Keyword(s):  
Grain Size ◽  
Cooling Rate ◽  
Grain Refinement ◽  
Master Alloy ◽  
Aluminium Alloys ◽  
Al Alloys ◽  
Ultrasonic Cavitation ◽  
Size Reduction ◽  
Refinement Efficiency ◽  
Master Alloys

In this study, grain refinement efficiency of a new oxide master alloy based on MgAl2O4 was demonstrated in Al alloys. The grain size of the reference alloy was reduced by 50-60% with the addition of the master alloy and introduction of ultrasonic cavitation. While cooling rate has an influence on the grain size reduction, higher levels of addition of master alloy was found to be not effective in further reducing the grain size.

scholarly journals Ultra Grain Refinement of Commercial Purity Aluminum by a Multi-Stack ARB Process

2003 ◽  
Vol 44 (7) ◽  
pp. 1376-1381 ◽  
Author(s):  
Seong-Hee Lee ◽  
Hajime Inagaki ◽  
Hiroshi Utsunomiya ◽  
Yoshihiro Saito ◽  
Tetsuo Sakai
Keyword(s):  
Grain Refinement ◽  
Commercial Purity ◽  
Commercial Purity Aluminum
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