Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites

IMR OpenIR

	Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites; Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites
	Z. F. Zhang; G. He; J. Eckert
	2005 ; 2005
发表期刊	Philosophical Magazine ; Philosophical Magazine
ISSN	1478-6435 ; 1478-6435
卷号	85 期号:9 页码:897-915
摘要	The room-temperature deformation and fracture behaviour of Ti-based composites with ductile dendrites, prepared by copper mold casting and arc-melting techniques, was investigated. Under compressive loading, the Ti-based composites display high fracture strength (about 2000 MPa) and good ductility (about 4 or 10%). The yield strength of the Ti-based composites is relatively low (about 565-923 MPa). However, they have a large strain-hardening ability before failure, due to the interactions between shear bands and dendrites. For the arc-melted Ti-based composites, fracture often occurs in a shear mode with a high plasticity ( about 10%). In contrast, the cast Ti-based composites break or split into several parts with a compressive plasticity of 4%, rather than failing in a shear mode. A new fracture mechanism, i.e. distensile fracture, is proposed for the first time to elucidate the failure of the as-cast Ti-based composites. Based on the difference in the fracture modes of the differently prepared composites, the relationships between shear and distensile fracture mechanisms and the corresponding fracture criteria are discussed.; The room-temperature deformation and fracture behaviour of Ti-based composites with ductile dendrites, prepared by copper mold casting and arc-melting techniques, was investigated. Under compressive loading, the Ti-based composites display high fracture strength (about 2000 MPa) and good ductility (about 4 or 10%). The yield strength of the Ti-based composites is relatively low (about 565-923 MPa). However, they have a large strain-hardening ability before failure, due to the interactions between shear bands and dendrites. For the arc-melted Ti-based composites, fracture often occurs in a shear mode with a high plasticity ( about 10%). In contrast, the cast Ti-based composites break or split into several parts with a compressive plasticity of 4%, rather than failing in a shear mode. A new fracture mechanism, i.e. distensile fracture, is proposed for the first time to elucidate the failure of the as-cast Ti-based composites. Based on the difference in the fracture modes of the differently prepared composites, the relationships between shear and distensile fracture mechanisms and the corresponding fracture criteria are discussed.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. leibniz inst solid state & mat res, inst metall mat, d-01171 dresden, germany. natl inst mat sci, light mat grp, tsukuba, ibaraki 3050047, japan. th darmstadt, dept mat & geosci, div phys met, d-64287 darmstadt, germany.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, wenhua rd 72, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn ; chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. leibniz inst solid state & mat res, inst metall mat, d-01171 dresden, germany. natl inst mat sci, light mat grp, tsukuba, ibaraki 3050047, japan. th darmstadt, dept mat & geosci, div phys met, d-64287 darmstadt, germany.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, wenhua rd 72, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Ti-based Composite Ti-based Composite Dendrites Dendrites Shear Fracture Shear Fracture Distensile Fracture Distensile Fracture Shear Bands Shear Bands Bulk Metallic-glass Bulk Metallic-glass Mechanical-properties Mechanical-properties Enhanced Plasticity Enhanced Plasticity Amorphous-alloys Amorphous-alloys High-strength High-strength Matrix Composites Matrix Composites Deformation Deformation Microstructure Microstructure Phase Phase Flow Flow
URL	查看原文 ; 查看原文
WOS记录号	WOS:000227431700001 ; WOS:000227431700001
引用统计	被引频次：17[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/321006/35250
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. F. Zhang,G. He,J. Eckert. Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites, Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites[J]. Philosophical Magazine, Philosophical Magazine,2005, 2005,85, 85(9):897-915, 897-915.
APA	Z. F. Zhang,G. He,&J. Eckert.(2005).Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites.Philosophical Magazine,85(9),897-915.
MLA	Z. F. Zhang,et al."Shear and distensile fracture behaviour of Ti-based composites with ductile dendrites".Philosophical Magazine 85.9(2005):897-915.