On the conditions for achieving ultra-fine grains via thermo-mechanical treatment

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	On the conditions for achieving ultra-fine grains via thermo-mechanical treatment
	C. J. Huang ; H. Zhang ; Y. J. Nan ; D. Z. Li ; Y. Y. Li
刊名	Journal of Materials Processing Technology
	2005
卷号	160 期号:2 页码:123-127
关键词	ultra-fine grains hot rolling steel strips undercooling strip rolling process ferrite steel transformation deformation austenite
ISSN号	0924-0136
中文摘要	A finite element analysis was performed to study a novel hot rolling process by which ultra-fine grains (UFG) were achieved. FE analysis shows that the formation of ultra-fine grains was caused by a combination of severe undercooling and intensive deformation. It is found that undercooling was greater than 180 K within the ultra-fine grained surface layer. It is suggested in this paper that severe undercooling could significantly enhance the efficiency of grain refinement in thermo-mechanical processes. Hence, ultra-fine grains were obtained via a relatively low reduction hot rolling process. Special hot compression tests, during which severe undercooling were introduced before deformation, were done to verify the effect of undercooling on grain refinement. Ultra-fine grains were achieved by compression at a reduction ratio of 0.7. The critical undercooling to achieve ultra-fine grains was about 200 K. (c) 2004 Elsevier B.V. All rights reserved.
原文出处	://WOS:000227689700004
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/34877]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	C. J. Huang,H. Zhang,Y. J. Nan,et al. On the conditions for achieving ultra-fine grains via thermo-mechanical treatment[J]. Journal of Materials Processing Technology,2005,160(2):123-127.
APA	C. J. Huang,H. Zhang,Y. J. Nan,D. Z. Li,&Y. Y. Li.(2005).On the conditions for achieving ultra-fine grains via thermo-mechanical treatment.Journal of Materials Processing Technology,160(2),123-127.
MLA	C. J. Huang,et al."On the conditions for achieving ultra-fine grains via thermo-mechanical treatment".Journal of Materials Processing Technology 160.2(2005):123-127.