Characterization Of Microstructure And Fatigue Life Of CP Titanium Grade 2 Specimens Subject To Various Bending Processes

This study focussed on an investigation into the fatigue behaviour of commercially pure (CP) titanium (Ti) grade 2 specimens produced by various bending (deformation) processes, i.e. mechanical bending, laser bending and laser-mechanical bending. Although published literature on the fatigue behaviou...

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Bibliographic Details
Published in:WIT Transactions on Engineering Sciences Vol. 78; p. 25
Main Authors: Fidder, H, Botes, A, Woudberg, S, McGrath, P J
Format: Journal Article
Language:English
Published: Southampton W I T Press 01.01.2013
Subjects:
Bending fatigue
Crack initiation
Crack propagation
Deformation
Fatigue life
Forming
Fracture mechanics
Lasers
Life prediction
Mechanical properties
Microstructure
Production methods
Residual stress
Stress analysis
Titanium
ISSN:1746-4471, 1743-3533
Online Access:Get full text
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Summary:This study focussed on an investigation into the fatigue behaviour of commercially pure (CP) titanium (Ti) grade 2 specimens produced by various bending (deformation) processes, i.e. mechanical bending, laser bending and laser-mechanical bending. Although published literature on the fatigue behaviour of components produced by laser forming is relatively limited, it was found that laser bending could improve the mechanical behaviour of such components. At high fatigue load settings the microstructure was the dominant contributor to crack initiation and crack growth. After the specimens were bent, residual stress analysis as well as a characterization of the microstructure was performed on the three bent samples as well as the parent plate. Mathematical equations were formulated and presented for the laser forming process for predicting the fatigue life of CP Ti grade 2. This study revealed that the laser forming process can be successfully used as a manufacturing method in the forming of CP Ti grade 2.
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ISSN:1746-4471
1743-3533
DOI:10.2495/SECM130031