| Autor: |
Laijun Wu, Lin Geng, L.J. Huang, Yongyun Zhang, Bin Liu, X.Q. Song |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Materials Science and Engineering: A. 581:128-132 |
| ISSN: |
0921-5093 |
| DOI: |
10.1016/j.msea.2013.05.076 |
| Popis: |
In situ TiB whiskers reinforced Ti6Al4V (TiBw/Ti64) composites were fabricated by tailoring a novel network microstructure—which improved the strengthening and toughening effects of titanium matrix composites (TMCs). Superplastic tensile deformation of the composites was carried out at 900–1000 °C and 0.0005–0.01 s −1 . The results showed that the tensile elongation of the novel composites is over 100%, even up to 214% at 940 °C. The strain rate sensitivity ( m ) and the activation energy ( Q ) of the novel composites are 0.25 and 338 kJ/mol, respectively. These phenomena indicate that the novel composites possess an improved deformability. The superplasticity of the TiBw/Ti64 composites can be attributed to the novel network microstructure, which can induce superior deformability by inhibiting local deformation, decreasing crack propagation rate and refining grain size. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect