Enhanced superplasticity and strength in modified Ti-6Al-4V alloys
Beta-stabilizing elements were added Ti-6Al-4V alloy with a view to lowering its optimum superplastic forming temperature. The alloys modified with 2 wt pct Fe, Co, and Ni produced values of flow stress, strain rate sensitivity, and total elongation at 1088 K approaching those of the base Ti-6Al-4V alloy at its standard superplastic forming temperature of 1200 K. In addition to lowering the superplastic forming temperature, the beta-stabilizing elements also increased room temperature strength levels above those normally found for Ti-6Al-4V. The addition of beta-stabilizing elements raised resistance to deformation at room temperature, while lowering it at elevated temperatures. This result is explained by considering the effects of high-diffusivity beta stabilizers on deformation processes at room and elevated temperatures. 23 references.
- Research Organization:
- Rockwell International Science Center, Thousand Oaks, CA
- OSTI ID:
- 6459916
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 14A; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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