Abstract
Commercially-pure titanium containing 0 vol.% and 10 vol.% TiC particulates was thermally cycled about the allotropic transformation temperature of the matrix while being subjected to an external uniaxial tensile stress. Under these conditions, unreinforced titanium is superplastic, as evidenced by a high strain to fracture of 200% and a high strain-sensitivity exponent. The average strain per cycle is in good agreement with existing transformation-mismatch superplasticity models, based on the biasing by the external stress of the transformation mismatch stresses or strains. Transformation-mismatch superplasticity is also observed in the Ti-10% TiC metal matrix composite, which displays a strain to fracture of 135% and an average strain per cycle significantly higher than for unreinforced titanium. This novel effect is modeled by considering the increase in mismatch stresses in the composite, as a result of the inert TiC particles in the transforming titanium matrix.
| Original language | English (US) |
|---|---|
| Title of host publication | Superplasticity and Superplastic Forming |
| Publisher | Minerals, Metals & Materials Soc (TMS) |
| Pages | 125-133 |
| Number of pages | 9 |
| State | Published - Dec 1 1995 |
| Event | Proceedings of the 1995 124th TMS Annual Meeting - Las Vegas, NV, USA Duration: Feb 13 1995 → Feb 16 1995 |
Other
| Other | Proceedings of the 1995 124th TMS Annual Meeting |
|---|---|
| City | Las Vegas, NV, USA |
| Period | 2/13/95 → 2/16/95 |
ASJC Scopus subject areas
- Geology
- Metals and Alloys