Environmental fatigue crack propagation behavior of β-annealed Ti-6Al-4V alloy in NaCl solution under controlled potentials

Ahn, Seong-Ki; Jeong, Daeho; Kwon, Youngeun; Goto, Masahiro; Sung, Hyokyung; Kim, Sangshik

doi:10.1016/j.ijfatigue.2018.02.013

Cited by 10 publications

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhao et al [10] proved that the corrosion fatigue crack growth rate (CFCGR) of the Ti6Al4V alloy was strongly dependent on the microstructure, where compared to equiaxed and bimodal microstructures, the CFCGR of the lamellar microstructure was far higher in simulated body fluid due to the α/β phase interface and β grain boundary with a high corrosion sensitivity to the corrosive environment. Ahn et al [11] suggested that the microstructure-sensitive cracking of the Ti6Al4V alloy was more sensitive to the NaCl solution. Jesus et al [12] studied the effect of corrosion potential on the fatigue crack growth of Ti-6Al-4V caused by selective laser melting and concluded that the fatigue crack growth rate in a 3.5%wt NaCl solution is 3.3 times higher than that in an inert ambient environment.…”

Section: Introductionmentioning

confidence: 99%

Low-Cycle Corrosion Fatigue Deformation Mechanism for an α+β Ti-6Al-4V-0.55Fe Alloy

Sun,

Qian,

Chang

et al. 2024

Metals

View full text Add to dashboard Cite

Titanium alloys with high strength and good corrosion resistance have become one of the critical bearing structural materials in marine engineering. But in service, corrosion fatigue would occur under the synergetic action of cyclic external load and corrosion environment, threatening the safety of components. In this study, compared with low-cycle fatigue in laboratory air, the low-cycle corrosion fatigue deformation mechanism and fracture characteristic of the Ti-6Al-4V-0.55Fe alloy were investigated in 3.5% NaCl corrosion solution under selected stress amplitudes. The results showed that under low stress amplitude, corrosion fatigue was determined by fatigue damage and corrosion damage, causing a reduction in fatigue life. The local stress concentration caused by corrosion pits and dislocations pile-up accelerated the initiation of fatigue cracks, and other corrosion behavior including crevice corrosion promoted fatigue crack propagation; the corrosion solution increased the surface damage. While under high stress amplitude, due to the short contact time between the sample and solution and higher applied stress, the fatigue life is determined by fatigue damage caused by multiple slips.

show abstract

Section: Introductionmentioning

confidence: 99%