HOT WORKABILITY DURING SUBTRANSUS DEFORMATION AT HIGHER STRAIN RATES OF TC11 ALLOY WITH WIDMANSTATTEN MICROSTRUCTURE

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	HOT WORKABILITY DURING SUBTRANSUS DEFORMATION AT HIGHER STRAIN RATES OF TC11 ALLOY WITH WIDMANSTATTEN MICROSTRUCTURE
	H. W. Song ; S. H. Zhang ; M. Cheng ; F. Men ; C. L. Bao
刊名	International Journal of Modern Physics B
	2009
卷号	23 期号:6-7 页码:875-880
关键词	TC11 alloy flow behavior hot workability microstructure evolution globularization starting structure ti-6al-4v evolution behavior working
ISSN号	0217-9792
中文摘要	The effect of processing parameters on hot workability and microstructure evolution during subtransus deformation of TC11 alloy with widmanstaten microstructure was studied using isothermal compression tests. Testing was conducted at strain rates of 0.1-10s(-1), temperature ranges 920-980 degrees C and height reductions of 30-70%. The influence of hot working parameters on flow behavior, hot workability and microstructure evolution was systemically investigated. The results showed that all the flow curves exhibited a peak stress at very low strains (<0.1) followed by extensive flow softening. Surface fracture, cavitations and localized shear flow were found to be main factors that limited the hot workability of TC11 alloy. At low strains, lamellar kinking started to occur due to the orientation between the colony alpha lamellar and stress axis. With deformation continues, reorientation of the lamellar colony occurred and the deformed lamellar became elongated and thinner. At high stains, segmentation and globularization of alpha lamellar took place to produce a refined microstructure with alpha grain size around 1 mu m that is technologically desirable for secondary processes such as superplastic forming. A microstructure mechanism map based on the previous results was then established and applied to process design considering defect and microstructure control.
原文出处	://WOS:000266134700019
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/32287]
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	H. W. Song,S. H. Zhang,M. Cheng,et al. HOT WORKABILITY DURING SUBTRANSUS DEFORMATION AT HIGHER STRAIN RATES OF TC11 ALLOY WITH WIDMANSTATTEN MICROSTRUCTURE[J]. International Journal of Modern Physics B,2009,23(6-7):875-880.
APA	H. W. Song,S. H. Zhang,M. Cheng,F. Men,&C. L. Bao.(2009).HOT WORKABILITY DURING SUBTRANSUS DEFORMATION AT HIGHER STRAIN RATES OF TC11 ALLOY WITH WIDMANSTATTEN MICROSTRUCTURE.International Journal of Modern Physics B,23(6-7),875-880.
MLA	H. W. Song,et al."HOT WORKABILITY DURING SUBTRANSUS DEFORMATION AT HIGHER STRAIN RATES OF TC11 ALLOY WITH WIDMANSTATTEN MICROSTRUCTURE".International Journal of Modern Physics B 23.6-7(2009):875-880.