About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Understanding Corrosion-Related Cracking
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| Presentation Title |
First Experimental Evidence of Liquid Metal Embrittlement of Two Titanium Alloys by Lithium |
| Author(s) |
Itza Camila Hittner, Thierry Auger, Bassem Barkia, Jean-Louis Courouau |
| On-Site Speaker (Planned) |
Itza Camila Hittner |
| Abstract Scope |
Liquid metal embrittlement (LME) is a phenomenon characterized by the reduction of mechanical properties of a material induced by the adsorption of a liquid metal at its surface. We present a first case of embrittlement of titanium grade 2 (α alloy) and Ti-6Al-4V (α–β alloy) by liquid lithium, which had so far not been explored for LME sensitivity. Tensile tests carried out in a liquid lithium environment demonstrate severe embrittlement of Ti-6Al-4V and, under specific wetting conditions, measurable embrittlement of titanium grade 2. The characterizations of the fracture surface by TEM analysis indicate a predominant cleavage fracture mode on the (10-13) plane, which distinguishes this system from most LME cases of intergranular cracking. This cleavage fracture is also accompanied by local micro-plasticity phenomena, underscoring the complex interplay between brittle and ductile processes in lithium-induced embrittlement. These results will be compared to DFT modeling of the solid-liquid interface energetics. |