Mechanical properties and microstructures of Al-Fe alloys processed by high-pressure torsion

Jorge M. Cubero-Sesin, Zenji Horita

Research output: Contribution to journalArticle

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Abstract

Al-Fe alloys in the form of thin disks 10 mm in diameter, with Fe nominal weight fractions of 0.5, 1, 2, and 5 pct, were extracted from bulk-extruded rods and processed by high-pressure torsion (HPT). A group of these bulk samples was processed in an as-received state, whereas another group was annealed at 773 K (500 °C) for a period of 1 hour, prior to the application of HPT. An additional set of samples was prepared by mixing high-purity powders with similar Fe contents and consolidated directly in the HPT facility. The samples were processed up to 10 revolutions. Vickers microhardness, tensile strength, and elongation to failure were evaluated for all cases along with observations of the Al matrix by transmission electron microscopy (TEM). Basic characterization of the microstructures was carried out by X-ray diffraction (XRD) and optical microscopy (OM). Significant strengthening with ductility retained was achieved in the bulk samples as a consequence of grain refinement and dispersion of intermetallic phases. Powder samples had a more gradual increase in strength but increased ductility as a result of the imposed strain.

Original languageEnglish
Pages (from-to)5182-5192
Number of pages11
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume43
Issue number13
DOIs
Publication statusPublished - Dec 1 2012

Fingerprint

Torsional stress
torsion
mechanical properties
Mechanical properties
Powders
microstructure
Microstructure
Ductility
ductility
Grain refinement
Microhardness
Intermetallics
Optical microscopy
Elongation
Tensile strength
Transmission electron microscopy
X ray diffraction
microhardness
tensile strength
elongation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Metals and Alloys
  • Mechanics of Materials

Cite this

Mechanical properties and microstructures of Al-Fe alloys processed by high-pressure torsion. / Cubero-Sesin, Jorge M.; Horita, Zenji.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 43, No. 13, 01.12.2012, p. 5182-5192.

Research output: Contribution to journalArticle

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