Fabrication and superior ductility of laminated Ti-TiBw/Ti composites by diffusion welding
Fabrication and superior ductility of laminated Ti-TiBw/Ti composites by diffusion welding
复制标题
扩散焊层状 Ti-TiBw/Ti 复合材料的制备及其优异的延展性
DOI：
10.1016/j.jallcom.2014.02.140
复制
发表时间：
2014-07-25
影响因子：
6.2
通讯作者：
Zhang, W. C.
中科院分区：
文献类型：
--
作者：
Liu, B. X.;Huang, L. J.;Zhang, W. C.
采用扩散焊方法成功地制备了两种新型的Ti-TiBw/Ti复合材料，分别由200 μ m和400 μ m厚的纯Ti层和200 μ m厚的TiB晶须增强Ti（TiBw/Ti）复合层组成。在此，可以通过原始Ti板和TiBw/Ti复合板精确地控制两层的单独厚度。与纯钛材料（546 MPa，17.5%）相比，两种叠层复合材料的拉伸强度（分别为625 MPa和569 MPa）和伸长率（分别为19.0%和27.5%）均有所提高。这种上级塑性主要归因于颈缩延迟效应和分层屏蔽效应。断口分析表明，TiBw/Ti复合层中形成了大量的隧道裂纹，纯Ti层中出现了剪切带。此外，Ti层与TiBw/Ti复合层界面之间形成了分层，有利于复合材料的增韧。(C)2014爱思唯尔有限公司版权所有。
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.