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HomeKey Engineering MaterialsKey Engineering Materials Vol. 741A Review of Subsurface Crack Initiation Models in...

A Review of Subsurface Crack Initiation Models in High-Cycle Fatigue for Titanium Alloys

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Abstract:

The characterization of subsurface fatigue crack initiate sites of near α and α-β types titanium alloys and their cracking models proposed were reviewed. The crack initiation sites consisted of facets mostly on near basal plane of α grain, although the crystallographic orientation and surface topography of the facets presented a subtle difference. The crack initiation mechanisms were a quasi-cleavage accompanying high normal stress on the plane, a combination of basal slip and normal stress across the basal plane, and a pure slip on facet plane inclined near 45 degree to loading axis.

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Analysis of Damage Features and Failures for Structural Materials and Parts

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Periodical:

Key Engineering Materials (Volume 741)

Pages:

76-81

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.741.76

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Online since:

June 2017

Authors:

Wei Bo Li*, Osamu Umezawa

Keywords:

Dwell Fatigue, Facet, High-Cycle Fatigue, Microcrack, Subsurface Crack Initiation

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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