Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics

Kaveh Edalati; Motoaki Matsuo; Hoda Emami; Shota Itano; Ali Alhamidi; Aleksandar Staykov; David Smith; Shin ichi Orimo; Etsuo Akiba; Zenji Horita

doi:10.1016/j.scriptamat.2016.07.007

Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics

Kaveh Edalati, Motoaki Matsuo, Hoda Emami, Shota Itano, Ali Alhamidi, Aleksandar Staykov, David Smith, Shin ichi Orimo, Etsuo Akiba, Zenji Horita

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

TiFe_1-xMn_x 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 (TiFe_0.7Mn_0.3 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.

Original language	English (US)
Pages (from-to)	108-111
Number of pages	4
Journal	Scripta Materialia
Volume	124
DOIs	https://doi.org/10.1016/j.scriptamat.2016.07.007
State	Published - Nov 1 2016

Keywords

Activation
Density functional theory (DFT)
High-pressure torsion (HPT)
Metal hydrides
Nanostructured intermetallics

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2016.07.007

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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 David Smith 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 (US)",

volume = "124",

pages = "108--111",

journal = "Scripta Materialia",

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TY - JOUR

T1 - Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics

AU - Edalati, Kaveh

AU - Matsuo, Motoaki

AU - Emami, Hoda

AU - Itano, Shota

AU - Alhamidi, Ali

AU - Staykov, Aleksandar

AU - Smith, David

AU - Orimo, Shin ichi

AU - Akiba, Etsuo

AU - Horita, Zenji

N1 - 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: © 2016 Elsevier B.V.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - 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.

AB - 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.

KW - Activation

KW - Density functional theory (DFT)

KW - High-pressure torsion (HPT)

KW - Metal hydrides

KW - Nanostructured intermetallics

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JO - Scripta Materialia

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ER -

Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics

Abstract

Keywords

ASJC Scopus subject areas

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