Deformation and fracture of Ti-base nanostructured composite

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	Deformation and fracture of Ti-base nanostructured composite
	J. Das; K. B. Kim; Z. F. Zhang; G. He; C. Muller; J. Eckert
	2008
发表期刊	International Journal of Materials Research
ISSN	1862-5282
卷号	99 期号:9 页码:985-990
摘要	The in-situ formation of nano-eutectic/primary dendrite bulk composites in Ti-base multicomponent alloy systems allows the design of advanced high strength materials, where a nanostructured matrix is combined with ductile beta-Ti solid solution dendrites as a toughening phase. This microstructure can be achieved over a wide range of cooling rates. The multicomponent recipe stabilizes the beta-Ti phase and helps to reduce the eutectic spacing to the nanometer scale. The superiority in the mechanical properties, i.e. high room temperature ductility (up to 30%) as well as high strength (up to 2600 MPa), stems from the possibility to tailor the alloy composition leading to the formation of different volume fractions of dendrites in a nanostructured eutectic matrix. All composites with high volume fraction of dendrites offer a high ductility (epsilon(p) = 8-30%) and a final failure angle in the range of 46-51 degrees. The role of the volume fraction of the dendrites in the composite in enhancing the ductility as well as the fracture angle is critically assessed. The deformation and fracture mechanisms are linked to the macroscopic fracture features as well as to impingement of the shear bands leading to rotation of the shear plane and lattice distortion at the atomic level.
部门归属	[das, jayanta; eckert, juergen] ifw dresden, inst komplexe mat, d-01069 dresden, germany. [kim, ki buem] sejong univ, dept adv mat engn, seoul, south korea. [zhang, zhe-feng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang, peoples r china. [he, guo] shanghai jiao tong univ, sch mat sci & engn, shanghai 200030, peoples r china. [mueller, clemens] tech univ darmstadt, fg phys met kunde, fb mat & geowissensch 11, darmstadt, germany. [eckert, juergen] tech univ dresden, inst werkstoffwissensch, d-01069 dresden, germany.;das, j (reprint author), ifw dresden, inst komplexe mat, helmholtzstr 20,postfach 2701 16, d-01069 dresden, germany;j.das@ifw-dresden.de
关键词	Ti-base Composite Fracture Angle Shear Band Lattice Distortion Rotation Mechanism Bulk Metallic-glass Matrix Composites Mechanical-properties Enhanced Plasticity High-strength Hydrostatic-pressure Dendrite Composite Ductile Dendrites Microstructure Behavior
URL	查看原文
WOS记录号	WOS:000259966100009
引用统计	被引频次：1[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/321006/32711
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Das,K. B. Kim,Z. F. Zhang,et al. Deformation and fracture of Ti-base nanostructured composite[J]. International Journal of Materials Research,2008,99(9):985-990.
APA	J. Das,K. B. Kim,Z. F. Zhang,G. He,C. Muller,&J. Eckert.(2008).Deformation and fracture of Ti-base nanostructured composite.International Journal of Materials Research,99(9),985-990.
MLA	J. Das,et al."Deformation and fracture of Ti-base nanostructured composite".International Journal of Materials Research 99.9(2008):985-990.