Predicting primary dendrite arm spacing in Al–Si–Mg alloys: effect of Mg alloying

2019 ◽  
Vol 54 (13) ◽  
pp. 9907-9920 ◽  
Author(s):  
Colin D. Ridgeway ◽  
Cheng Gu ◽  
Alan A. Luo
Keyword(s):  
Primary Dendrite ◽  
Mg Alloys ◽  
Dendrite Arm Spacing ◽  
Primary Dendrite Arm Spacing

Numerical Simulation of Inclusion Capture in the Slab Continuous Casting Considering the Influence of the Primary Dendrite Arm Spacing

2018 ◽  
Vol 37 (4) ◽  
pp. 375-386
Author(s):  
Yanbin Yin ◽  
Jiongming Zhang ◽  
Shaowu Lei ◽  
Zhitong Wang
Keyword(s):  
Continuous Casting ◽  
Primary Dendrite ◽  
Three Dimensional ◽  
Solidification Process ◽  
Slab Surface ◽  
Continuous Casting Mold ◽  
Slab Continuous Casting ◽  
Dendrite Arm Spacing ◽  
Inclusion Concentration ◽  
Primary Dendrite Arm Spacing

AbstractIn the present work, a coupled three-dimensional numerical model of fluid flow, heat transfer, and inclusion motion during the solidification of molten steel in slab continuous casting mold has been developed. Based on the model, this paper has studied the inclusion capture during the process. The influence of the primary dendrite arm spacing on inclusion capture has been considered. The inclusion distributions, total masses, and average diameters at different depth from the slab surface have been given out in the present paper. The simulation results revealed the inclusion concentration existed in the solidification process, and the inclusion capturing area varies with the depth from the slab surface.

Relationship between Growth Rates and Dendritic Microstructure Parameters in Al-5wt. Zn Binary Alloy

2013 ◽  
Vol 765 ◽  
pp. 215-219 ◽  
Author(s):  
Emine Acer ◽  
Harun Erol ◽  
Mehmet Gündüz
Keyword(s):  
Growth Rates ◽  
Numerical Models ◽  
Primary Dendrite ◽  
Linear Regression Analysis ◽  
Experimental Results ◽  
Directionally Solidified ◽  
Dendritic Microstructure ◽  
Dendrite Arm Spacing ◽  
Primary Dendrite Arm Spacing ◽  
Microstructure Parameters

Al-5 wt.% Zn samples were prepared using high purity (99.99%) metals in graphite crucibles. The samples were directionally solidified upward with a constant temperature gradient (G= 5.5 Kmm-1) and different growth rates,V, (8.25-165 μm/s) in a Bridgman type directional solidification apparatus. The dendritic spacings (λ1: Primary dendrite arm spacing, and λ2: Secondary dendrite arm spacing) were measured from the longitudinal sections of the samples and λ1was also measured from the transverse sections. The measured spacings were expressed as functions of the growth rates by using a linear regression analysis. The effect ofVon λ1and λ2were investigated. The experimental results were compared with the results of the current theoretical and numerical models and similar previous experimental results.

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