About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
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Fracture in Metals: Insights from Experiments and Modeling Across Length and Time Scales
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Presentation Title |
Is There a Quantitative Relationship Between Strain Localization and Ductility in Ti Alloys? |
Author(s) |
Tiphaine Giroud, Patrick Villechaise, Azdine Naït-Ali, Francois Bourdin, Damien Texier, Samuel Hemery |
On-Site Speaker (Planned) |
Samuel Hemery |
Abstract Scope |
Detrimental consequences of strain localization are often invoked in microstructure optimization and alloy design approaches aiming at improved strength – ductility tradeoffs. However, quantitative information about such a relationship is rarely available, despite the development of experimental techniques allowing large scale characterization of strain fields. In this presentation, we report a study focused on titanium alloys using specifically adapted investigation methods. In situ tensile tests were combined with digital image correlation at the mesoscale to characterize strain fields over the whole gage length of specimens. Two examples are presented, namely the widely used α+β Ti-6Al-4V alloy with different microstructures resulting from a variety of processing routes, and the metastable β Ti-10V-2Fe-3Al alloy tested using different loading conditions. The existence of a quantitative relationship between strain localization and ductility is finally discussed, with an emphasis on limitations and underlying mechanisms. |