About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Some Impact of Hydrogen Concentration and Distribution on Low Cycle Fatigue Behavior of Titanium Alloys |
Author(s) |
Larissa Caroline Martins Moreira, Xavier Feaugas, Jamaa Bouhattate, Abdelali Oudriss, Simon Frappart, Aude Mathis, Thierry Millot, Cyril Berziou, Guillaume Lotte, Stéphane Cohendoz |
On-Site Speaker (Planned) |
Xavier Feaugas |
Abstract Scope |
The impact of hydrogen on the low-cycle fatigue behavior of titanium alloys was investigated in the present study. The samples were charged with different hydrogen concentrations using cathodic polarization in a glycerinated H3PO4 medium followed by a homogenization heat treatment. Then, low cycle fatigue tests were carried out under total strain control at room temperature. The mechanical behavior seems to be correlated to the evolution of hydrogen in solid solution and hydrides interactions with dislocations. Both impact the number of cycles to fracture and tenacity. Different hydride morphologies and their interactions with cyclic dislocations structures have been related based on post mortem observations using transmission electron microscopy and correlated with the mechanical properties depending on hydrogen content. In addition, the stress-strain hysteresis loops are investigated to understand the internal stresses evolutions as a function of cycles, as well as its relationship with the formation of defects and dislocations patterns. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Environmental Effects, Mechanical Properties |