Influence of electromagnetic parameters on solidification structure of pure Al in the case of identical power
Yong-yong Gong1,2 Shu-min Cheng1 Yu-yi Zhong1 Xiang Wang1 Yun-hu Zhang2,3 Qi-jie Zhai2,3,4 Hong-gang Zhong2,3 Zhi-shuai Xu2 Rong Yue1 Ning Pei1
1 College of Science, Shanghai University, Shanghai 200444, China 2 Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200444, China 3 School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China 4 Materials Genome Institute, Shanghai University, Shanghai 200444, China
Influence of electromagnetic parameters on solidification structure of pure Al in the case of identical power
Yong-yong Gong1,2 Shu-min Cheng1 Yu-yi Zhong1 Xiang Wang1 Yun-hu Zhang2,3 Qi-jie Zhai2,3,4 Hong-gang Zhong2,3 Zhi-shuai Xu2 Rong Yue1 Ning Pei1
1 College of Science, Shanghai University, Shanghai 200444, China 2 Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200444, China 3 School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China 4 Materials Genome Institute, Shanghai University, Shanghai 200444, China
摘要 Pulsed magneto oscillation（PMO）a s a new electromagnetic technology to generate the grain refinement in metals and alloys was significantly developed in the recent years. This paper investigated the influence of electromagnetic parameters variation on the grain size reduction in pure Al under the application of PMO with a constant inputting power. The experimental results show that the grain refinement degree can be improved with increasing the current intensity in the case of the identical power. Moreover, through analyzing the electromagnetic force and resistance force applied on the nucleus, a criterion of the nucleus detached from the mould wall is constructed. Based on the criterion, the detachment of nuclei with finer radius can cause better effect of the grain refinement, when applying a higher current peak. The movement of the detached grains is considered by analyzing the influence of electromagnetic force and forced flow.
Abstract：Pulsed magneto oscillation（PMO）a s a new electromagnetic technology to generate the grain refinement in metals and alloys was significantly developed in the recent years. This paper investigated the influence of electromagnetic parameters variation on the grain size reduction in pure Al under the application of PMO with a constant inputting power. The experimental results show that the grain refinement degree can be improved with increasing the current intensity in the case of the identical power. Moreover, through analyzing the electromagnetic force and resistance force applied on the nucleus, a criterion of the nucleus detached from the mould wall is constructed. Based on the criterion, the detachment of nuclei with finer radius can cause better effect of the grain refinement, when applying a higher current peak. The movement of the detached grains is considered by analyzing the influence of electromagnetic force and forced flow.
GONG Yong-Yong,CHENG Shu-Min,XU Zhi-Shuai, et al. Influence of electromagnetic parameters on solidification structure of pure Al in the case of identical power[J]. Journal of Iron and Steel Research International, 2018, 25(8): 854-861.
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2018, Vol. 25 
