@article{2728ea3e366c44c7a4426e12d3a41e8b,
title = "Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics",
abstract = "TiFe1-xMnx intermetallics (x = 0, 0.15 and 0.3) were severely deformed by high-pressure torsion (HPT) to enhance their activation and air resistivity for hydrogenation. While the as-cast ingots hardly absorbed hydrogen (TiFe0.7Mn0.3 exhibited slow activation after an incubation period), the HPT-processed samples absorbed hydrogen quickly at room temperature even after air exposure. The improvement of hydrogen storage performance was due to the formation of lattice defects and amorphous regions, which act as channels for hydrogen diffusion. Rietveld analyses and first-principles calculations showed that Mn addition expands the lattice and reduces the hydride formation energy, and thus decreases the hydrogenation/activation pressure.",
keywords = "Activation, Density functional theory (DFT), High-pressure torsion (HPT), Metal hydrides, Nanostructured intermetallics",
author = "Kaveh Edalati and Motoaki Matsuo and Hoda Emami and Shota Itano and Ali Alhamidi and Aleksandar Staykov and Smith, {David J.} and Orimo, {Shin ichi} and Etsuo Akiba and Zenji Horita",
note = "Funding Information: One of the authors (KE) acknowledges a P&P grant from Kyushu University (No. 27513 ) and a Grant-in-Aid from MEXT , Japan, for Scientific Research (No. 16H04539 ). The authors also acknowledge the John M. Cowley Center for High-Resolution Electron Microscopy at Arizona State University for the TEM facilities, and IRC-GSAM (the International Research Center for Giant Straining for Advanced Materials) at Kyushu University for the HPT facility. This work was also supported by the Grant-in-Aids from the MEXT , Japan (No. 26220909 and No. 15K14183 ). Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",
year = "2016",
month = nov,
day = "1",
doi = "10.1016/j.scriptamat.2016.07.007",
language = "English",
volume = "124",
pages = "108--111",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Ltd.",
}