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Mechanical properties of magnetic Fe‐based and Co‐based amorphous wires and microwires
Author(s) -
Chiriac H.,
Lupu N.,
Dobrea V.,
Corodeanu S.
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200881269
Subject(s) - materials science , annealing (glass) , ultimate tensile strength , amorphous solid , elongation , composite material , modulus , young's modulus , crystallography , chemistry
In this paper we present measurements of the mechanical properties of magnetically soft Fe‐based and Co‐based conventional amorphous wires (CAW) and glass‐covered amorphous microwires (GCAW) in the as‐quenched state, before and after cold rolling, and after annealing for internal stresses relief. The tensile strength ( σ ) varies between 2000 MPa and 3400 MPa, strongly depending on CAW diameter and annealing temperature. The Young modulus ( E ) is following a descendant trend, decreasing with the diameter decrease. The increase of tensile strength ( σ ) and elongation ( ε ) values after cold‐rolling and post‐annealing is caused by the release of the internal stresses induced during the preparation. Tensile strengths up to 3900 MPa are achieved for Fe‐based GCAW, depending very strongly on the microwires diameter, but mostly on the glass cover thickness. σ reaches the maximum value of 3150 MPa for a Co‐based microwire having the glass cover of 9 μm and the total diameter of 43 μm, but increases even more after the glass removal (3350 MPa). This behaviour is attributed to the structural disorder and the specific magnetic domains structure in Fe‐based and Co‐based CAW and GCAW. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)