Elastic properties of Ti-24Nb-4Zr-8Sn single crystals with bcc crystal structure

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	Elastic properties of Ti-24Nb-4Zr-8Sn single crystals with bcc crystal structure
	Y. W. Zhang; S. J. Li; E. G. Obbard; H. Wang; S. C. Wang; Y. L. Hao; R. Yang
	2011
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	59 期号:8 页码:3081-3090
摘要	Single crystals of Ti2448 alloy (Ti-24Nb-4Zr-8Sn in wt.%) were grown successfully using an optical floating-zone furnace. Several kinds of resonant methods gave consistent Young's moduli of 27.1, 56.3 and 88.1 GPa and shear moduli of 34.8, 11.0 and 14.6 GPa for the < 1 0 0 >, < 1 1 0 > and < 1 1 1 > oriented single crystals, and C(11), C(12) and C(44) of 57.2, 36.1 and 35.9 GPa respectively. Uniaxial testing revealed asymmetrical elastic behaviors of the < 1 1 0 > crystals: tension caused elastic softening with a large reversible strain of similar to 4% and a stress plateau of similar to 250 MPa, whereas compression resulted in gradual elastic stiffening with much smaller reversible strain. The < 1 0 0 > crystals exhibited weak nonlinear elasticity with a large elastic strain of similar to 2.5% and a high strength, approaching similar to 20% and similar to 30% of its ideal shear and ideal tensile strength respectively. The (1 1 1) crystals showed linear elasticity with a small elastic strain of similar to 1%. These elastic deformation characteristics have been interpreted in terms of weakened atomic interactions against crystal distortion to low crystal symmetry under external applied stresses. These results are consistent with the properties of polycrystalline Ti2448, including high strength, low elastic modulus, large recoverable strain and weak strengthening effect due to grain refinement. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[zhang, y. w.; li, s. j.; obbard, e. g.; wang, h.; wang, s. c.; hao, y. l.; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;hao, yl (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;ylhao@imr.ac.cn
关键词	Titanium Alloy Body-centered Cubic Crystal Elastic Moduli Elastic Constants Elastic Deformation Plastic-deformation Youngs Modulus Gum Metal Behavior Superelasticity Alloys Mechanism Symmetry Strength Silicon
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WOS记录号	WOS:000290053100018
引用统计	被引频次：101[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/321006/30932
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. W. Zhang,S. J. Li,E. G. Obbard,et al. Elastic properties of Ti-24Nb-4Zr-8Sn single crystals with bcc crystal structure[J]. Acta Materialia,2011,59(8):3081-3090.
APA	Y. W. Zhang.,S. J. Li.,E. G. Obbard.,H. Wang.,S. C. Wang.,...&R. Yang.(2011).Elastic properties of Ti-24Nb-4Zr-8Sn single crystals with bcc crystal structure.Acta Materialia,59(8),3081-3090.
MLA	Y. W. Zhang,et al."Elastic properties of Ti-24Nb-4Zr-8Sn single crystals with bcc crystal structure".Acta Materialia 59.8(2011):3081-3090.