Effect of aging on the fatigue strength of two lamellar microstructural variants of Ti-6A1-4V alloy
- Univ. of Toronto (Canada)
The fatigue properties of a coarse lamellar structure produced by slow cooling from 1250 C to room temperature and a fine lamellar structure resulting from a 1000 C solution anneal followed by an oil quench were investigated. In the unaged condition both structures exhibited similar fatigue behavior. These structures were then subjected to two again treatments; 700 C for 8h and 750 C for 16h. With respect to fatigue strength there was little difference between the two aging treatments. Aging did not alter the fatigue properties of the coarser structure, but increased the high cycle fatigue strength of the finer structure from 500 MPa to about 575 MPa. In both structures aging resulted in considerable alpha/beta interface changes but this was not thought to significantly affect the fatigue properties of either structure. Aging also resulted in the removal of stacking faults which occurred only in the alpha plates of the finer structure and it was suggested that this may be related to the increased high cycle fatigue strength of this lamellar variant.
- OSTI ID:
- 5450435
- Report Number(s):
- CONF-840909--
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN 0197-1689; ISSN TMPSA
- Country of Publication:
- United States
- Language:
- English
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