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) : Maringer,R. E.

Report Date : 01 FEB 1967

Pagination or Media Count : 24

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)

Descriptors :   (*IRON, MAGNETIC PROPERTIES), CRYSTAL DEFECTS, FERROMAGNETISM, DEFECTS(MATERIALS), ELASTIC PROPERTIES, IMPURITIES, DAMPING, PERMEABILITY(MAGNETIC)

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE