Abstract
Spall microstructure characteristics and fracture mechanism of Ti-6Al-4V and Ti-47Nb alloys were studied by plate impact experiments and “sample soft-capture” technology under the dynamic high-pressure loading, as well as microscopic analyses using optical microscopy and scanning electronic microscopy. The results indicate that Ti-6Al-4V alloy has stronger ability of spall resistance than Ti-47Nb alloy because of the high strength of Ti-6Al-4V alloys. The micro-voids in the spalled Ti-6Al-4V alloy almost nucleate at the α/β phase boundaries and propagate along the phase boundaries, and the micro-cracks of Ti-47Nb alloy are directly connected through micro-voids. Subsequently, the adiabatic shear band (ASB), which forms between macroscopic voids or main cracks, promotes the spall fracture of samples. Ti-6Al-4V and Ti-47Nb alloys fracture with ductile characteristics.
| Translated title of the contribution | Spall Microstructure Characteristics and Fracture Mechanism of Ti-6Al-4V and Ti-47Nb Alloys under Dynamic High-pressure Loading |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 829-834 |
| Number of pages | 6 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 47 |
| Issue number | 3 |
| Publication status | Published - 1 Mar 2018 |