Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy

M Lang; JM Larsen

doi:10.1520/STP13404S

SYMPOSIA PAPER Published: 01 January 2000

STP13404S

Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy

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An experimental investigation of load interaction effects in Ti-6Al-2Sn-4Zn-2Mo is presented. Simple variable amplitude loading spectra were applied to test samples, and the crack propagation stress intensity factor, K_PR, was subsequently measured. The data were condensed to two equations (“master curves”) that describe the influence of an unloading cycle after constant amplitude loading and a single overload cycle, respectively. The results suggest that load interaction effects are caused by residual compressive stresses ahead of the crack front, whereas the influence of crack closure is minor.

Author Information

Lang, M

IABG, Ottobrunn, OH, Germany

Larsen, JM

Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH

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Details

Developed by Committee: E08

Pages: 201–213

DOI: 10.1520/STP13404S

ISBN-EB: 978-0-8031-5418-6

ISBN-13: 978-0-8031-2617-6

Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy

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