Fatigue Crack Nucleation and Growth Mechanisms for Ti6Al4V in Different Environments

Sergio Baragetti; Cristian Foglia; Riccardo Gerosa

doi:10.4028/www.scientific.net/KEM.525-526.505

Paper Titles

Matching Asymptotic Method in Propagation of Cracks with Dugdale Model
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Formability Evaluation of Non-Crimp Carbon Fabric by Non-Contact 3D Deformation Measurement System
p.493

Modelling Micro-Damage in Granular Solids
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Load and Environmental Effects on the Corrosion Behavior of a Ti6Al4V Alloy
p.501

Fatigue Crack Nucleation and Growth Mechanisms for Ti6Al4V in Different Environments
p.505

Modeling Delamination of Interfacial Corner Cracks in Multilayered Structures
p.509

Crack Modelling Using the Material Point Method and a Strong Discontinuity Approach
p.513

Numerical Simulation of Crack Tip Behavior under Fatigue Loading
p.517

Delamination Threshold Load of Composite Laminates under Low-Velocity Impact
p.521

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Fatigue Crack Nucleation and Growth Mechanisms for Ti6Al4V in Different Environments

Abstract:

In this work fracture surfaces of Ti-6Al-4V flat samples subjected to fatigue tests were examined by means of a scanning electron microscope. SEM analyses allowed to observe in detail the morphology of the fracture surfaces, in order to identify the crack nucleation zones and the crack growth mechanisms accurately. The surface morphologies were examined in order to compare the alloy behavior, considering different test environments and stress concentration factor values (K_t). The analyses resulted in the observation of different corrosion fatigue micro-mechanisms related to the stress concentration factor and to the test environment.

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Periodical:

Key Engineering Materials (Volumes 525-526)

Pages:

505-508

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.525-526.505

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Online since:

November 2012

Authors:

Sergio Baragetti, Cristian Foglia, Riccardo Gerosa

Keywords:

Corrosion, Fatigue Crack Growth (FCG), K_t Effect, Microstructure, Ti6Al4V

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