Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites

IMR OpenIR

	Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites
	H. Zhang; X. F. Pan; Z. F. Zhang; J. Das; K. B. Kim; C. Muller; F. Baier; M. Kusy; A. Gebert; G. He; J. Eckert
	2005
发表期刊	Zeitschrift Fur Metallkunde
ISSN	0044-3093
卷号	96 期号:6 页码:675-680
摘要	The compressive deformation behavior of a multi-component Ti-Cu-Ni-Sn-Nb composite containing ductile dendritic precipitates embedded in a nanostructured matrix was investigated. The Ti-based composite not only displays a high compressive plasticity of approximate to 21 %, but also exhibits a high fracture strength of approximate to 1.8 GPa, which is comparable to that of monolithic bulk metallic glasses. Pronounced work hardening was observed after yielding. The surface deformation morphology reveals that the work-hardening behavior of the composite is related to the plastic deformation of the dendritic phase and the interaction of shear bands in the nanostructured matrix with the hardened dendrites. At the final stage of compression, most of the dendrites are work hardened, whereby the propagation of the shear bands in the matrix is retarded. The strong interaction between the dendrites and the matrix contributes to the high strength and plastic deformation capability of the composite. The fracture surface exhibits viscous flow traces, indicating that softening or melting of the composite occurs at the moment of fracture, due to the release of the high elastic energy stored in the specimen.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. tech univ darmstadt, fb mat & geowissensch 11, fg phys met kunde, d-64287 darmstadt, germany. ifw dresden, inst met werkstoffe, dresden, germany. shanghai jiao tong univ, sch mat sci & engn, shanghai 200030, peoples r china.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Ti-based Composite Dendritic Phase Compressive Plasticity Shear Bands Work Hardening Bulk Metallic-glass Fatigue-crack Propagation Ni-cu-be Amorphous-alloys Fracture-toughness Enhanced Plasticity Supercooled Liquid Microstructure Behavior Shear
URL	查看原文
WOS记录号	WOS:000230562600023
引用统计	被引频次：13[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/321006/35207
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Zhang,X. F. Pan,Z. F. Zhang,et al. Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites[J]. Zeitschrift Fur Metallkunde,2005,96(6):675-680.
APA	H. Zhang.,X. F. Pan.,Z. F. Zhang.,J. Das.,K. B. Kim.,...&J. Eckert.(2005).Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites.Zeitschrift Fur Metallkunde,96(6),675-680.
MLA	H. Zhang,et al."Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites".Zeitschrift Fur Metallkunde 96.6(2005):675-680.