Effect of cold rolling on the fatigue properties of Ti-6Al-4V
The S/N properties of a metal or alloy are improved by cold working. This effect is a result of the increase of the flow stress due to an increase in dislocation density. It is pointed out, however, that in the case of the titanium alloy Ti-6Al-4V cold work can have a deleterious effect on the fatigue properties. The present investigation is concerned with this phenomenon. Experiments were conducted with Ti-6Al-V alloy, which was obtained in sheet form in a thickness of 1.27 mm. The material was used in two conditions. In one case the material was tested in the as-received (mill-annealed) condition. In the other case the material was reduced in thickness by cold rolling to a total reduction of 20 percent. Specimens were prepared and fatigue tests were conducted. It was found that cold work of the two-phase alpha/beta Ti-6Al-4V alloy leads to a decrease in fatigue strength. 5 references.
- Research Organization:
- Shenyang Aircraft Corp., People's Republic of China
- OSTI ID:
- 5792669
- Journal Information:
- Metall. Trans., A; (United States), Vol. 16A
- Country of Publication:
- United States
- Language:
- English
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