Fracture mechanisms in flat and cylindrical tensile specimens of TRIP-TWIP β-metastable Ti-12Mo alloy
(2021) Acta Materialia — Vol. 220, p. 117294 (2021)
Files
ActaMaterialia2202021117294-Abstract.pdf
Open Access - Adobe PDF
- 120.58 KB
Details
- Authors
Elmahdy, A. 
Verleysen, P.
- Abstract
- Enhanced mechanical properties in terms of strain hardening capacity and uniform strain have been mea- sured for recently developed TRIP-TWIP β−metastable Ti alloys. However, hardly anything has been re- ported about their fracture properties. An original fracture scenario including adiabatic shear banding is proposed for both flat and cylindrical tensile specimens of Ti-12wt.% Mo tested in quasi-static condi- tions at room temperature. The geometry of the tensile specimens has a strong influence on the fracture mechanism. The fusible coating method was used with Sn and Cu coatings to qualitatively evaluate the evolution of the temperature during fracture, colder than 232 °C during crack initiation and increasing up to the melting temperature of the alloy during crack propagation. High-speed imaging was also used to estimate the evolution of the crack propagation speed, increasing up to 1,840 m . s −1 , a level correspond- ing to unstable crack propagation. The evolution of the temperature rise and of the crack speed is linked to the specific fracture patterns.
- Affiliations
UGent Department of Electromechanical, Systems and Metal Engineering
Citations
Choisez, L., Elmahdy, A., Verleysen, P., & Jacques, P. (2021). Fracture mechanisms in flat and cylindrical tensile specimens of TRIP-TWIP β-metastable Ti-12Mo alloy. Acta Materialia, 220, 117294. https://doi.org/10.1016/j.actamat.2021.117294 (Original work published 2021)