Article ID Journal Published Year Pages File Type
5013888 Engineering Fracture Mechanics 2017 10 Pages PDF
Abstract
To examine near-threshold fatigue crack propagation in commercially pure (CP) titanium with a bimodal harmonic structure, which is defined as a coarse grained structure surrounded by a network of fine grains, K-decreasing tests were conducted. The crack growth rates for harmonic-structured CP titanium were higher than those for homogeneous material with coarse grains at comparable stress intensity range, while the threshold stress intensity range was lower. This phenomenon was attributed to a reduction in the extent of crack closure and the effective threshold stress intensity range, resulting from the presence of fine grains in the harmonic structure.
Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
Authors
, , , , , ,