Precipitate nanostructuring that enhances lattice compatibility in a Ti-Fe-Al alloy

A novel hierarchical microstructure has been identified in a TiFeAl alloy. TEM analysis revealed lens-like features that were comprised of nanoscale domains of an ordered intermetallic B2 phase enveloped by channels of an orthorhombic phase. This nanostructure reduced the misfit between the matrix a...

Full description

Saved in:
Bibliographic Details
Published inScripta materialia Vol. 232; p. 115476
Main Authors Mellor, R.F.L., Vacek, P., Jones, N.G., Midgley, P.A., Stone, H.J.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.07.2023
Subjects
4D-STEM
High-Resolution Electron Microscopy (HREM)
Intermetallics
Nanostructure
Superlattice
Intermetallics
4D-STEM
Nanostructure
High-Resolution Electron Microscopy (HREM)
Superlattice
Online AccessGet full text

Cover

More Information
Summary:A novel hierarchical microstructure has been identified in a TiFeAl alloy. TEM analysis revealed lens-like features that were comprised of nanoscale domains of an ordered intermetallic B2 phase enveloped by channels of an orthorhombic phase. This nanostructure reduced the misfit between the matrix and precipitates in the plane of the lenses, thereby providing better strain compatibility than precipitates consisting entirely of the B2 phase. The alloy demonstrated an exceptional Vickers hardness of 590 HV. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2023.115476