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
	2009
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	23 期号:6-7 页码:875-880
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.
部门归属	[song, hongwu; zhang, shihong; cheng, ming; men, fei] chinese acad sci, inst met res, shenyang, peoples r china. [bao, chunling] shenyang res inst foundry, titanium alloy div, shenyang, peoples r china.;song, hw (reprint author), chinese acad sci, inst met res, shenyang, peoples r china;hwsong@imr.ac.cn baochunling0323@126.com
关键词	Tc11 Alloy Flow Behavior Hot Workability Microstructure Evolution Globularization Starting Structure Ti-6al-4v Evolution Behavior Working
URL	查看原文
WOS记录号	WOS:000266134700019
引用统计	被引频次：3[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/321006/32287
专题	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.