Grain refinement and formation of ultrafine-grained microstructure in a low-carbon steel under electropulsing

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	Grain refinement and formation of ultrafine-grained microstructure in a low-carbon steel under electropulsing
	Y. Z. Zhou; W. Zhang; B. Q. Wang; G. H. He; J. D. Guo
	2002
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	17 期号:8 页码:2105-2111
摘要	High current electropulsing was applied to a low-carbon steel in the solid state. The relationship between grain size and experimental conditions was revealed. It was found that the ultrafine-grained (UFG) microstructure could be formed when electric current density, heating rate, and cooling rate all were high. The UFG samples prepared by applying electropulsing were free of porosity and contamination, and had no large microstrain. Also, their tensile strength was dramatically enhanced over that of their coarse-grained counterparts, without a decrease in ductility. The mechanism for grain refinement and formation of the UFG microstructure was discussed. It is proposed that the effect of a decrease in thermodynamic barrier and enhancement of nucleation rate in a current-carrying system cannot be neglected.
部门归属	chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;guo, jd (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Passing Electric-current Metals Conductors 1045-steel Castings Cu50ti50 Alloys Size
URL	查看原文
WOS记录号	WOS:000177208800036
引用统计	被引频次：83[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36594
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Z. Zhou,W. Zhang,B. Q. Wang,et al. Grain refinement and formation of ultrafine-grained microstructure in a low-carbon steel under electropulsing[J]. Journal of Materials Research,2002,17(8):2105-2111.
APA	Y. Z. Zhou,W. Zhang,B. Q. Wang,G. H. He,&J. D. Guo.(2002).Grain refinement and formation of ultrafine-grained microstructure in a low-carbon steel under electropulsing.Journal of Materials Research,17(8),2105-2111.
MLA	Y. Z. Zhou,et al."Grain refinement and formation of ultrafine-grained microstructure in a low-carbon steel under electropulsing".Journal of Materials Research 17.8(2002):2105-2111.