Effect of microstructure on the plain and notched fatigue properties of IMI 550 Ti alloy |
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| Authors: | T.M. Yue K. Tabeshfar P.J.E. Forsyth |
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| Affiliation: | 1. Drs Yue and Forsyth are with the Department of Engineering Materials at The University of Southampton, UK;2. Dr Tabeshfar, is with the Department of Engineering Computing and Mathematics, Dorset Institute of Higher Education, Norwich Union House, Chrischurch Road, Bournemouth, Dorset BH1 3NG, UK |
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| Abstract: | The fatigue crack initiation and propagation in plain and notched specimens of titanium IMI 550 alloy with different percentages of transformed β-phase has been investigated. The S/N curves for plain specimens having a two-phase α/β microstructure were superior to those having a 100% transformed β microstructure. It is thought that this difference is due to easier crack paths in the β-stabilized samples, which contain very large grains. The notched S/N curves, however, were not dependent on microstructure. The overall crack propagation rates were similar for the three microstructures studied. |
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| Keywords: | fatigue fatigue crack propagation microstructure IMI 550 titanium alloy |
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