Creep-fatigue interaction of titanium alloy Ti-6Al-2Cb-1Ta-0.8Mo at room temperatureThe present investigation is concerned with the mutual influence of creep and fatigue in the case of Ti-6211, which represents a new weldable, stress-corrosion resistant alloy. Attention is given to the effect of creep on fatigue, the effect of fatigue on creep, and microstructural studies. It is found that prior creep in the amounts investigated, from 0.2 percent to 2.7 percent, is beneficial to low-cycle fatigue life. Hold time at peak strain is found to be beneficial to low-cycle fatigue life. Hold time at constant stress has no effect on low-cycle fatigue when specimens are cycled only once between hold times; but increasing fatigue loading for 50 or more cycles between hold times can prolong the fatigue life. There is an acceleration of creep by cyclic loading when comparison of cyclic and static creep is based on mean stress.
Document ID
19860042658
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chu, H. P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mcdonald, B. A. (U.S. Navy, Office of Naval Research, Arlington VA, United States)
Arora, O. P. (David Taylor Naval Ship Research and Development Center Annapolis, MD, United States)