Solidification of Pb-Al Alloys Under the Influence of Electric Current Pulses

doi:10.1007/s40195-017-0685-1

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	Solidification of Pb-Al Alloys Under the Influence of Electric Current Pulses
	Ahmed, T 2; Jiang, HX ; Li, W ; Zhao, JZ
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2018-08-01
卷号	31 期号:8 页码:842-852
关键词	Immiscible alloys Solidification Electric current pulses Nucleation Microstructure formation
ISSN号	1006-7191
DOI	10.1007/s40195-017-0685-1
英文摘要	Continuous solidification experiments are carried out with Pb-Al alloys under the influence of the electric current pulses (ECPs). The results demonstrate that the ECPs mainly affect the microstructure formation through changing the energy barrier for the nucleation of the minority phase droplets (MPDs) and minority phase particles (MPPs) during cooling Pb-Al alloys in the liquid-liquid and liquid-solid phase transformation temperature ranges in advance of the solidification of the matrix liquid. For Pb-Al alloys with Al-rich droplets/particles as the minority phase, the ECPs lower the energy barriers for the nucleation of the MPDs/MPPs and cause a significant increase in the nucleation rate of the MPDs/MPPs and, thus, promote the formation of Pb-Al alloys with a well-dispersed or even nanoparticles dispersed microstructure. The ECPs parameters show an important influence on the microstructure formation of Pb-Al alloys. The refinement extent of the MPDs/MPPs increases with the increase in the peak current density. For a given peak current density, the refinement extent of the MPDs/MPPs increases with the increases in the pulse frequency and pulse width first, and then level off and become asymptotic.
学科主题	Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000436510100007
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80073]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ahmed, T,Jiang, HX,Li, W,et al. Solidification of Pb-Al Alloys Under the Influence of Electric Current Pulses[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2018,31(8):842-852.
APA	Ahmed, T,Jiang, HX,Li, W,&Zhao, JZ.(2018).Solidification of Pb-Al Alloys Under the Influence of Electric Current Pulses.ACTA METALLURGICA SINICA-ENGLISH LETTERS,31(8),842-852.
MLA	Ahmed, T,et al."Solidification of Pb-Al Alloys Under the Influence of Electric Current Pulses".ACTA METALLURGICA SINICA-ENGLISH LETTERS 31.8(2018):842-852.