Abstract
Two novel laminated Ti-TiBw/Ti composites, consisting of pure Ti layers with different thicknesses of 200 μm and 400 μm and TiB whisker reinforced Ti (TiBw/Ti) composite layers with a constant thickness of 200 μm, 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.
| Original language | English |
|---|---|
| Pages (from-to) | 187-192 |
| Number of pages | 6 |
| Journal | Journal of Alloys and Compounds |
| Volume | 602 |
| DOIs | |
| State | Published - 25 Jul 2014 |
Keywords
- Delamination
- Diffusion welding
- Laminated composites
- Tensile properties
- Titanium matrix composites
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