Agard (Advisory Group for Aerospace Research and Development) Engine Disc Material Cooperative Test (Supplementary Program).
Abstract
From a gas turbine engine compressor spool of Ti-17 alloy, cylindrical unnotched specimens and flat double edge notched specimens were machined and fatigue-tested. The flat double edge notched specimens were also subjected to electrical potential drop measurements. The microstructure and fracture surface morphology of the representative specimens were examined. The variation of fatigue life, N, with applied stress range, delta s, was described by an equation of the form log N = a + b (delta s). The variation of normalized crack voltage, (V/V sub o)/V sub R/V sub Ro), with normalized crack length, (a/w), was given by an equation of the form (V/V sub o)/(V sub R/V sub Ro) = A + A sub 1 (a/w) + A sub 2 (a/w)sq + A sub 3 (a/w) cu. Keywords: Titanium alloys; Compressor spools; Electrical potential; Fatigue crack initiation; Fracture(Mechanics); Stress range; Crack length.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 1987
- Accession Number
- ADA193678
Entities
People
- Eun U. Lee
Organizations
- Naval Air Warfare Center Warminster