Accession Number:

AD0646513

Title:

AN INVESTIGATION OF THE EFFECTS OF SOLUTE ELEMENTS ON THE MAGNETOELASTIC DAMPING AND COERCIVITY IN VERY PURE IRON.

Descriptive Note:

Final rept.,

Corporate Author:

BATTELLE MEMORIAL INST COLUMBUS OHIO

Personal Author(s):

Report Date:

1967-02-01

Pagination or Media Count:

24.0

Abstract:

The existence of ferromagnetic domains and domain walls in alpha iron provides the basis for a wide variety of related magnetic and magnetoelastic properties which reflect the behavior of defects in the iron lattice. The special case of solute interstitial atoms serves as a general example. The interstitial atoms tend to order with respect to the magnetic vector within a domain, and thereby tend to inhibit domain-wall motion. Since the domain walls can be induced to move by imposing either a magnetic field or a stress, there is a considerable parallelism between the results of both experimental techniques. For example, magnetic permeability has its counterpart in the strain-amplitude dependence of magnetoelastic damping the time-dependent decrease in magnetic permeability after demagnetization has its counterpart in the time-dependent decrease in magnetoelastic damping after demagnetization the temperature dependence of magnetic permeability has its counterpart in the magneteoelastic contribution to the dynamic modulus. The role played by magnetic- and stress-induced ordering in these phenomena is now reasonably well understood. Author

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE