Characterization Of Microstructure And Fatigue
Life Of CP Titanium Grade 2 Specimens Subject To
Various Bending Processes
Author(s)
H. Fidder, A. Botes, S. Woudberg & P. J. McGrath
Abstract
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.
Keywords: laser forming, fatigue testing, residual stress, commercially pure
titanium, microstructure.
Keywords
Keywords: laser forming, fatigue testing, residual stress, commercially pure
titanium, microstructure.
Related Book
Other papers in this volume
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