scholarly journals Change in Primary Dendrite Arm Spacing by Abrupt Change of Growth Velocity

2012 ◽  
Vol 76 (3) ◽  
pp. 189-196 ◽  
Author(s):  
Sang Han Park ◽  
Hisao Esaka ◽  
Kei Shinozuka
Keyword(s):  
Growth Velocity ◽  
Abrupt Change ◽  
Primary Dendrite ◽  
Dendrite Arm Spacing ◽  
Primary Dendrite Arm Spacing

EFFECT OF CU CONTENT AND GROWTH VELOCITY ON THE MICROSTRUCTURE PROPERTIES OF THE DIRECTIONALLY SOLIDIFIED AL-MN-CU TERNARY ALLOYS

2021 ◽  
Vol 5 (20) ◽  
pp. 756-764
Author(s):  
Uğur BÜYÜK ◽  
Emin ÇADIRLI ◽  
Hasan KAYA ◽  
M. İzzettin YILMAZER
Keyword(s):  
Growth Velocity ◽  
Primary Dendrite ◽  
Ternary Alloys ◽  
Directionally Solidified ◽  
Dendritic Spacing ◽  
Cu Content ◽  
Dendrite Arm Spacing ◽  
Vacuum Atmosphere ◽  
Primary Dendrite Arm Spacing ◽  
Solidification Furnace

In this work, influences of composition (Cu content) and growth velocity (V) on the microstructure (dendritic spacing) of Al–Mn–Cu ternary alloys have been investigated. Al–1.9Mn–xCu (x=0.5, 1.5 and 5 wt. %) alloys were prepared using metals of 99.90% high purity in the vacuum atmosphere. These alloys were directionally solidified upwards under various growth velocities (8.3–978 m/s) using a Bridgman-type directional solidification furnace at a constant temperature gradient (7.1 K/mm). Measurements of primary dendrite arm spacing () of the samples were carried out and then expressed as functions of growth velocity and Cu content. Especially, cell-dendritic transition was detected for low growth velocity (41.6 m/s) for alloys containing 0.5 and 1.5Cu. It has been found that the values of  decrease with increasing V and decreasing Cu content. Keywords: Aluminum alloys, Solidification, Cell-dendritic transition, 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.

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