Fabrication and superior ductility of laminated Ti-TiBw/Ti composites by diffusion welding

被引：83

作者：

Liu, B. X. ^{[1
]}

Huang, L. J. ^{[1
]}

Geng, L. ^{[1
]}

Wang, B. ^{[1
]}

Liu, C. ^{[1
]}

Zhang, W. C. ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 602卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Titanium matrix composites; Laminated composites; Diffusion welding; Delamination; Tensile properties; TENSILE PROPERTIES; VOLUME FRACTION; MICROSTRUCTURAL CHARACTERIZATION; CRACK-PROPAGATION; BEHAVIOR; THICKNESS; TOUGHNESS; ALUMINUM;

D O I：

10.1016/j.jallcom.2014.02.140

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two novel laminated Ti-TiBw/Ti composites, consisting of pure Ti layers with different thicknesses of 200 mu m and 400 mu m and TiB whisker reinforced Ti (TiBw/Ti) composite layers with a constant thickness of 200 mu m, were successfully fabricated by diffusion welding. Herein, the individual thickness of the two layers can be controlled accurately through raw Ti sheets and TiBw/Ti composite sheets. The two prepared laminated composites exhibit higher ultimate tensile strength (625 MPa and 569 MPa, respectively) and higher elongations (19.0% and 27.5%, respectively) compared with pure Ti material (546 MPa, 17.5%). The superior ductility is mainly attributed to the necking delaying effect and delamination shielding effect. Fracture characteristics show that many tunnel cracks were formed in TiBw/Ti composite layer and shear bands were presented in the pure Ti layer. Moreover, interfacial delamination was formed between Ti layer and TiBw/Ti composite layer interface, which is beneficial to toughen the laminated composites. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：187 / 192

页数：6

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