Download or read book Variable Amplitude Fatigue Crack Growth in Titanium Alloy Ti-4Al-4Mo-2Sn-0.5Si (IMI 550). written by C. M. Ward-Close and published by . This book was released on 1988 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made of fatigue crack growth behaviour in the titanium alloy (Ti-4Al-4Mo-2Sn-0.5Si) (IMI 550)), subject to single tensile overloads and the FALSTAFF flight simulation loading spectrum. Fatigue overloads were found to produce crack growth rate acceleration, followed by delayed retardation. The transient changes in crack growth rates were associated with large changes in crack closure immediately behind the crack tip. For both single overloads and flight simulation loading, the greatest load-interaction effects were at the lowest load amplitudes. Microstructure had only a slight influence on load-interaction effects associated with single tensile overloads. Great Britain. (jes).