Accession Number : AD0711094

Title :   THE EFFECT OF STRESS ON THE MAGNETOSTRICTION OF IRON, NICKEL AND 49 PERMALLOY.

Descriptive Note : Technical rept.,

Corporate Author : NOTRE DAME UNIV IND COLL OF ENGINEERING

Personal Author(s) : Allen,C. W. ; Haborak,R. ; Kao,W. H.

Report Date : JUL 1970

Pagination or Media Count : 59

Abstract : The effect of applied stresses on the technical magnetostriction curve, saturation magnetostriction and 'reversible' magnetostriction at various levels of magnetization is examined experimentally and interpreted in terms of stress-induced changes in magnetization distribution. The different influences of employing 'hard' and 'soft' mechanical testing equipment in the application of stress in such experiments is considered. Experiments show that, while the effect of stress is to decrease the magnetomechanical coupling coefficients, K squared, for small field variations, superimposed stress may increase K squared by 50 percent when the field amplitude is made sufficiently large (e.g., for nickel, 250 oe). This result is important also from the point of view that the wrong stress distribution, applied or residual, intentional or accidental, can degrade transducer efficieny by a corresponding amount. (Author)

Descriptors :   (*MAGNETIC ALLOYS, MAGNETOSTRICTION), (*IRON, MAGNETOSTRICTION), (*NICKEL, MAGNETOSTRICTION), (*MAGNETOSTRICTION, STRESSES), (*MAGNETOSTRICTIVE ELEMENTS, PERFORMANCE(ENGINEERING)), IRON ALLOYS, NICKEL ALLOYS, TRANSDUCERS, ANISOTROPY

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE