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 journalArticle

15 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)108-111
Number of pages4
JournalScripta Materialia
Volume124
DOIs
StatePublished - Nov 1 2016

Fingerprint

Hydrogen storage
Manganese
Titanium
plastic deformation
Intermetallics
intermetallics
manganese
Hydrogen
Plastic deformation
Iron
titanium
Chemical activation
iron
Torsional stress
microstructure
Microstructure
Hydrogenation
activation
hydrogen
hydrogenation

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics. / Edalati, Kaveh; Matsuo, Motoaki; Emami, Hoda; Itano, Shota; Alhamidi, Ali; Staykov, Aleksandar; Smith, David; Orimo, Shin ichi; Akiba, Etsuo; Horita, Zenji.

In: Scripta Materialia, Vol. 124, 01.11.2016, p. 108-111.

Research output: Contribution to journalArticle

Edalati, K, Matsuo, M, Emami, H, Itano, S, Alhamidi, A, Staykov, A, Smith, D, Orimo, SI, Akiba, E & Horita, Z 2016, 'Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics', Scripta Materialia, vol. 124, pp. 108-111. https://doi.org/10.1016/j.scriptamat.2016.07.007
Edalati, Kaveh ; Matsuo, Motoaki ; Emami, Hoda ; Itano, Shota ; Alhamidi, Ali ; Staykov, Aleksandar ; Smith, David ; Orimo, Shin ichi ; Akiba, Etsuo ; Horita, Zenji. / Impact of severe plastic deformation on microstructure and hydrogen storage of titanium-iron-manganese intermetallics. In: Scripta Materialia. 2016 ; Vol. 124. pp. 108-111.
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AU - Alhamidi, Ali

AU - Staykov, Aleksandar

AU - Smith, David

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