Nanocrystalline FeCr alloys synthesised by severe plastic deformation - a potential material for exchange bias and enhanced magnetostriction

  title={Nanocrystalline FeCr alloys synthesised by severe plastic deformation - a potential material for exchange bias and enhanced magnetostriction},
  author={Lukas Weissitsch and Stefan Wurster and Alexander Paulischin and Martin Stuckler and Reinhard Pippan and Andrea Bachmaier},
  journal={Journal of Magnetism and Magnetic Materials},
Abstract This work gives insights into processing and characterisation of bulk nanocrystalline FeCr materials. The investigated FeCr alloys, consisting of 30, 50 and 70 at.% ferromagnetic Fe and remaining anti-ferromagnetic Cr, are processed by arc melting and subsequent severe plastic deformation by high pressure torsion. The physical similarities between elemental Fe and Cr in combination with the nanocrystalline structure of the as-deformed alloys, necessitates advanced characterisation… 

Figures from this paper


Processing of Nanostructured Bulk Fe-Cr Alloys by Severe Plastic Deformation
The processing of binary alloys consisting of ferromagnetic Fe and antiferromagnetic Cr by severe plastic deformation (SPD) with different chemical compositions has been investigated. Although the
The formation of supersaturated solid solutions in Fe–Cu alloys deformed by high-pressure torsion
Fully dense bulk nanocomposites have been obtained by a novel two-step severe plastic deformation process in the immiscible Fe–Cu system with a high hardness and an enhanced thermal stability.
Tailoring the magnetic properties of nanocrystalline Cu-Co alloys prepared by high-pressure torsion and isothermal annealing
Abstract In this study, severe plastic deformation by high-pressure torsion is used as a fabrication method for nanocrystalline magnetic Cu–Co alloys in bulk quantities. By subsequent isothermal
Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation
Abstract An equiatomic CoCrFeMnNi high-entropy alloy (HEA), produced by arc melting and drop casting, was subjected to severe plastic deformation (SPD) using high-pressure torsion. This process
Mechanical alloying process of Fe-Cr powders studied by magnetic measurements
A mechanical alloying process for a mixture of elemental Fe and Cr powders with the Cr compositions 20–70 at. % was investigated through the measurements of x‐ray diffraction, magnetization, and 57Fe
Strain Induced Anisotropic Magnetic Behaviour and Exchange Coupling Effect in Fe-SmCo5 Permanent Magnets Generated by High Pressure Torsion
High-pressure torsion (HPT), a technique of severe plastic deformation (SPD), is shown as a promising processing method for exchange-spring magnetic materials in bulk form. Powder mixtures of Fe and
Nanocrystalline soft magnetic materials
Nanocrystalline structures offer a new opportunity for tailoring soft magnetic materials. The most prominent example are devitrified glassy FeCuNbSiB alloys which reveal a homogeneous ultrafine grain
Tailoring the heterogeneous magnetostriction in Fe-Co alloys
Abstract Traditionally, magnetostriction of ferromagnetic materials was considered as an intrinsic homogeneous effect. More recently, the magnetostriction in certain binary systems such as Fe-Ga
Hardening by Annealing and Softening by Deformation in Nanostructured Metals
We observe that a nanostructured metal can be hardened by annealing and softened when subsequently deformed, which is in contrast to the typical behavior of a metal. Microstructural investigation
Magnetostriction of Fe–Cr and Fe–Cr–B Alloys
The room temperature magnetostriction of polycrystalline Fe<sub>100-x</sub>Cr<sub>x</sub> alloys annealed at 800 °C was investigated as a function of Cr content varying from 10 to 30 at.% Cr. All