Fig. 1 Stress-corrosion failure of an Apollo Ti-6Al-4V reaction control system (RCS) pressure vessel due to nitrogen tetroxide. (a) Failed vessel after exposure to pressurized N 2 O 4 for 34 h. (b) Cross section through typical stress-corrosion cracks. 250× More

Fig. 1 Stress-corrosion cracking of a solution-treated and aged Ti-6Al-4V Apollo service propulsion system (SPS) fuel pressure vessel during a system checkout test. Fluid test medium was methanol. (a) Cross section adjacent to weld in cracked vessel. 65×. (b) Another crack near the same weld More

Fig. 1 Failure location in the monolithic rotor hub, a Ti-6Al-4V forging More

Fig. 4 Cavitation erosion: incubation stage of Ti-6Al-4V on vibratory cavitation test. Courtesy of CETIM More

Fig. 76 Stress-strain plots for samples of Ti-6Al-4V, with sample axes aligned in the three principal directions of the material. Vickers hardness values appear in the schematic of a block of material. Source: Ref 81 More

Fig. 49 Stress-corrosion failure of an Apollo Ti-6Al-4V reaction control system (RCS) pressure vessel due to nitrogen tetroxide. (a) Failed vessel after exposure to pressurized N 2 O 4 for 34 h. (b) Cross section through typical stress-corrosion cracks. 250× More

Fig. 50 Stress-corrosion cracking of a solution-treated and aged Ti-6Al-4V Apollo service propulsion system (SPS) fuel pressure vessel during a system checkout test. Fluid test medium was methanol. (a) Cross section adjacent to weld in cracked vessel. 65×. (b) Another crack near the same weld More

Fig. 26 Potential drop obtained when fretting Ti-6Al-4V (IMI 318) titanium alloy in a saline solution More

Fig. 13 Crack tip opening of a shot-peened and residual-stress-free Ti-6Al-4V specimen. Source: Ref 35 More

Fig. 45 Second-phase cleavage fracture in Ti-6Al-4V. (a) Light micrograph of polished and etched surface. (b) SEM of fracture surface. Source: Ref 10 More

Fig. 51 Portion of a fracture surface in a Ti-6Al-4V alloy. (a) Low magnification (35.5×) image showing a striated structure in the facet near the center of the photograph. (b) Higher magnification (1420×) view of the facet. (c) Same region as in (b) after etching with 0.5% hydrofluoric More

Fig. 24 Flow-through defect in Ti-6Al-4V rib-web structural part More

Fig. 1 Center girth weld of a Ti-6Al-4V pressure vessel that failed during proof testing because of weld embrittlement resulting from oxygen contamination. (a) Interior surface of the weld illuminated with ultraviolet light, which reveals fluorescent liquid-penetrant indications of transverse More

Fig. 10 Photomicrographs of the Ti-6Al-4V parent material of the weldment taken from (A) the discolored test plate and (B) surface replica of the cylinder weldment. More

Fig. 62 (a) Photograph of failed Apollo Ti-6Al-4V reaction control system vessel after exposure to pressurized N 2 O 4 for 34 h. (b) Micrograph of a cross section from the vessel exhibiting stress-corrosion cracks. Original magnification: 250× More

Fig. 63 Micrographs of cross sections prepared adjacent to a weld in the Ti-6Al-4V Apollo service propulsion system fuel pressure vessel that failed during a hydrostatic test using methanol. (a) Cross section adjacent to weld in cracked vessel. (b) Another crack near the same weld. Original More

Fig. 7 Failed Ti-6Al-4V shear fasteners. The fasteners were cadmium plated for galvanic compatibility with the aluminum structure. (a) Photograph showing failure at the head-to-shank fillet. (b) Intergranular fracture morphology. Failure was attributed to liquid-metal-induced embrittlement More

Fig. 25 Normalized evolution of the energy wear rate of a Ti-6Al-4V interface as a function of contact size (keeping constant all of the other fretting wear loading parameters). Adapted from Ref 73 . Reprinted with permission from Elsevier More

Fig. 34 Potential drop obtained when fretting Ti-6Al-4V (IMI 318) titanium alloy in a saline solution. SCE, saturated calomel electrode More

Fig. 24 (a) Etched Waspaloy superalloy. (b) Ti-6Al-4V with alpha case. 2% HF etch More