ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract— Dynamic SCC (DSCC) behaviour of a Ti-6A1–4V alloy has been studied for different microstructures and orientations, in 3%NaCl solution, and the effect of crack size on crack growth behaviour was discussed. Three microstructures were prepared by heat treatment, i.e. two annealed materials (AN705 and AN850) and a solution treatment and ageing (STA) material. Tests were performed at a cyclic frequency of 10 Hz and a stress ratio of 0.9 using CT specimens for long cracks (a≥ 24 mm) and surface-cracked specimens for small cracks (a≥ 0.4 mm). The KDSCC values obtained for small cracks were considerably higher than those for long cracks in all the microstructures, that is a crack size effect in dynamic SCC behaviour was found in the Ti-6A1–4V alloy. For small cracks, the KDSCC values for AN705 and AN850 were the same in the L and T orientations, while the KDSCC value for STA was higher in the L orientation than in the T orientation. The KISCC values were almost the same as, or higher than, the KDSCC values.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.1997.tb01528.x
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