O. El Atwani H.T. Vo M. Tunes C. Lee A. Alvarado N. Krienke J. Poplawsky A.A. Kohnert J. Gigax W.-Y. Chen M. Li Y. Wang J.S. Wróbel Duc Nguyen-Manh J.K.S. Baldwin U. Tukac E. Aydogan S. Fensin E. Martinez
In the quest of new materials that can withstand severe irradiation and mechanical extremes for advanced applications (e.g. fission reactors, fusion devices, space applications, etc), design, prediction and control of advanced materials beyond current material designs become a paramount goal. Here, though a combined experimental and simula…
PreprintAndrew M. Alvarado Hi Vo Tin Jan S. Wr´obel Damian Sobieraj Duc Nguyen-Manh Saryu Jindal Fensin Enrique Martinez Osman El-Atwani
We present a Density Functional Theory-based cluster expansion model to predict the configurational energy of a multicomponent W-Ta-Cr-V-Hf quinary alloy. Coupled with Monte Carlo simulations we show that the model reproduces experimental observations. We analyze the thermodynamic properties of the W.31Ta.34Cr.05V.27Hf.03 system and observe two ph…
PreprintK. Arakawa Z. Bergstrom M.J. Caturla S.L. Dudarev F. Gao M.R. Gilbert A.M. Goryaeva S.Y. Hu X. Hu R.J. Kurtz A. Litnovsky J. Marian M.-C. Marinica E. Martinez E.A. Marquis D.R. Mason B.N. Nguyen P. Olsson Y. Osetskiy D. Senor
Prediction of material performance in fusion reactor environments relies on computational modelling, and will continue to do so until the first generation of fusion power plants come on line and allow long-term behaviour to be observed. In the meantime, the modelling is supported by experiments that attempt to replicate some aspects of the eventua…
Preprint PublishedM. J. Lloyd A. J. London M. Gilbert C. S. Becquart C. Domain E. Martinez M. Moody P. A. J. Bagot D. Nguyen-Manh D.E. J. Armstrong
Tungsten is one the primary candidate materials for the high neutron flux, high temperature components of a future demonstrate fusion reactor. Despite this, there is a lack of data on W under fusion relevant neutron doses and irradiation temperatures. Transmutation reactions result in the production of Re and Os solute atoms, at a rate which is …
Preprint PurchaseM. J. Lloyd E. Martinez L. Messina D. Nguyen-Manh
In this study, radiation-induced precipitation of transmutation products is addressed via the development of a new solute and vacancy concentration dependant Ising model for the W-Re-Os system. This new model includes interactions between both Os and Re atoms, thus facilitating more representative simulations of transmutation in fusion reactor comp…
Preprint PublishedDamian Sobieraj Jan S. Wróbel Tomasz Rygier Krzysztof J. Kurzydłowski Osman El Atwani Arun Devaraj Enrique Martinez Saez Duc Nguyen-Manh
The development of High-Entropy Alloys (HEAs) focuses on exploring compositional regions in multicomponent systems with all alloy elements in equal or near-equal atomic concentrations. Initially it was based on the main idea that high mixing configurational entropy contributions to the alloy free energy could promote the formation of a single so…
Preprint PublishedM.J. Lloyd R.G. Abernethy D.A.J. Armstrong P.A.J. Bagot M.P. Moody E. Martinez D. Nguyen-Manh
A viable fusion power station is reliant on the development of plasma facing materials that can withstand the combined effects of high temperature operation and high neutron doses. In this study we focus on W, the most promising candidate material. Re is the primary transmutation product and has been shown to induce embrittlement through cluster fo…
Preprint PublishedO. El-Atwani N. Li M. Li A. Devaraj M. Schneider D. Sobieraj J.S. Wrobel D. Nguyen-Manh S. A. Maloy E. Martinez
A novel W-based refractory high entropy alloy with outstanding radiation resistance has been developed. The alloy was grown as thin films showing a bimodal grain size distribution in the nanocrystalline and ultrafine regimes and a unique 4 nm lamella-like structure revealed by atom probe tomography (APT). Transmission electron microscopy (TEM) and …
Preprint Published