Hydrogen in high-strength aluminium based alloys has been a topic of interest to the group for several years now. A few years ago, we worked on the mechanism leading to decohesion of grain boundaries in the 7xxx-series Al: https://lnkd.in/ehc5eVZb demonstrating that this was due to a combination of the segregation of Mg, one of the key alloying elements in the alloy, together with hydrogen. We then investigated industrial alloys in stress-corrosion cracking conditions https://lnkd.in/e3eUZday and worked out that the same mechanism seemed to be active, along with many others that alterations of the microstructure arising from the corrosion and the localised deformation. Importantly both works showcased the importance of intermetallics in the trapping of hydrogen. I started collaborating with colleagues at Shanghai Jiaotong University and we worked out the influence of intermetallics on the hydrogen embrittlement sensitivity of a range of Al-alloys. https://lnkd.in/eGadT25j Now, we recently joined forces with colleagues from Xi’an Jiaotong University also used this knowledge to design new alloys containing highly complex phases with numerous interstitial sites that can trap hydrogen. The trick was to disperse this phase throughout the microstructure, and we achieved this by using heterogenous precipitation of a shell on an existing fine dispersion of precipitates of Sc-containing precipitates, leading to a high volume fraction of this complex Samson phase, that can trap very large quantities of hydrogen. This same strategy was then used on other alloy systems as Sc is scarce and could prevent the spread of such an approach. We hope you enjoy reading the paper : https://lnkd.in/eAP3Df4h
Geoff Scamans
6mo
Interesting from two points of view both the twin roll casting of a high magnesium alloy and the use of scandium as an effective stabilisation treatment.
Very nice work leveraging the Samson phase in such an innovative way. However also the massive amount of cutting-edge analysis is very impressive. Well done to everyone involved! Excited to see where this leads.
Geoff Scamans I imagine you would be interested to read this.
These are great publications. Congratulations
Milos Djukic
6mo
Baptiste Gault, Congratulations.
Mohamed ROUABHI
6mo
Excellent
Jun Wang
6mo
Huge congratulations Baptiste Gault! Super important work that will help boost confidence in using Al alloys in hydrogen clean energy-related applications. With the right composition and processing, maybe this approach can also be applied to other alloys!
Extremely happy to know the outcome of your detailed investigations shared by you Baptist that will definitely shape up the commercial use of Al alloys in hydrogen in these testing times. Great work, congratulations
Leah Graham
6mo
I absolutely love this research, and I would love to be a part of it!!! 🫶 Keep up the good work! Dreams are free…… but You don’t by anychance need a nanoparticle synthesist and chemical and Process engineer do you? 🙃With experience in Hydrogen, Renewable energy systems, advanced materials and nanotechnology (gained at the MacDiarmid Institute of advanced materials and Nanotechnology), Industrial manufacturing, BioEnergy, water and waste water treatment, heterogeneous catalysis, crystallography, TEM and SEM, Synchrotron XPS, SAXS and WAXS.🤓
Sustainable metals, green steel, simulation, recycling-oriented material design, metal physics, interfaces, phase transformation, hydrogen, Sustainable Manufacturing, Artificial Intelligence Methods
6moMany kind thanks all for this outstanding paper reporting such fundamental progress! Deep understanding of #corrosion and #hydrogen attack is so urgently needed, as there is hardly any better #sustainability metric than avoiding (environmentally-driven) product decay, damage and failure.