Digital Repository, ICF12, Ottawa 2009

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The Effect of Microstructure on Fatigue Crack Initiation in Ti-6Al-4V
A.L. Pilchak, A. Bhattacharjee, R.E.A. Williams, J.C. Williams

Last modified: 2013-05-06


The role of microstructure, including constituent morphology, microtexture and
local crystallographic orientation, on fatigue crack initiation in Ti-6Al-4V has
been investigated. Four point bend fatigue tests have been performed on samples
with equiaxed, bi-modal, fully lamellar and bi-lamellar microstructures. The
fractured specimens have been characterized using quantitative fractography and
electron backscatter diffraction. The results are discussed on the basis of slip
length, slip planarity and local crystallographic orientation.

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