scholarly journals Electromagnetic Field Induced Structure Transition of Aluminum Alloys during Direct Chill Casting

2017 ◽  
Vol 58 (8) ◽  
pp. 1134-1137 ◽  
Author(s):  
Lei Li ◽  
Qingfeng Zhu ◽  
Jianzhong Cui
Keyword(s):  
Electromagnetic Field ◽  
Aluminum Alloys ◽  
Direct Chill ◽  
Direct Chill Casting ◽  
Structure Transition ◽  
Chill Casting ◽  
Induced Structure

Effects of Low Frequency Electromagnetic Field on Segregation Layer during Hot-Top Casting of Aluminium Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 3795-3798
Author(s):  
Xiang Jie Wang ◽  
Jian Zhong Cui ◽  
Hai Tao Zhang ◽  
Hui Xue Jiang ◽  
Gao Song Wang
Keyword(s):  
Electromagnetic Field ◽  
Aluminium Alloy ◽  
Surface Segregation ◽  
Low Frequency ◽  
Casting Process ◽  
Direct Chill ◽  
Direct Chill Casting ◽  
Chill Casting ◽  
Direct Chill Casting Process

Surface segregation layer are frequently encountered during aluminium alloy direct chill casting process, and the removal of the surface segregation layer before further processing of the ingot decreases the ingot yield. In this work, the low frequency electromagnetic field was applied to study the effects of low frequency electromagnetic field on segregation layer during the direct chill casting process. The results show that under the effect of the low frequency electromagnetic field, the surface quality of ingot is improved, the structure of the ingot is refined, and the thickness of segregation layer is decreased.

Effect of Structure on Hot Tearing Properties of Aluminum Alloys

2007 ◽  
Vol 561-565 ◽  
pp. 995-998 ◽  
Author(s):  
Dmitry G. Eskin ◽  
Laurens Katgerman
Keyword(s):  
Aluminum Alloys ◽  
Solid Phase ◽  
High Strength ◽  
Direct Chill ◽  
Hot Tearing ◽  
Direct Chill Casting ◽  
Small Scale ◽  
Thermal Contraction ◽  
Chill Casting ◽  
High Strength Aluminum Alloys

Hot tearing is a significant problem upon direct-chill casting of high-strength aluminum alloys. The occurrence of hot cracks is related to the thermal contraction of the solid phase and to the lack of feeding by the liquid phase during solidification. It has been identified that structure features such as grain size and amount of nonequilibrium eutectics influence both phenomena involved in hot tearing. Experimental and computer-simulation results are presented for a range of model and commercial aluminum alloys. The results are obtained both during special small-scale experiments and during industrial-scale direct-chill casting. It is shown that grain refinement reduces hot tearing susceptibility of aluminum alloys through the related decrease of the temperature of thermal contraction onset and increased permeability of the mushy zone. The effects of process parameters on hot tearing are also discussed.

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