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Structure Induced Anelasticity In Iron Intermetallic Compounds And Alloys

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Structure Induced Anelasticity In Iron Intermetallic Compounds And Alloys

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Author : Igor S. Golovin
language : en
Publisher: Materials Research Forum LLC
Release Date : 2018-04-01

Structure Induced Anelasticity In Iron Intermetallic Compounds And Alloys written by Igor S. Golovin and has been published by Materials Research Forum LLC this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-01 with Technology & Engineering categories.

Different anelastic phenomena are discussed in this book with respect to iron-based binary and ternary alloys and intermetallic compounds of Fe3Me type, where Me are α-stabilizing elements Al, Ga, or Ge. An introduction into anelastic behavior of metallic materials is given, and methods of mechanical spectroscopy and neutron diffraction are introduced for the better understanding of structure-related relaxation and hysteretic phenomena. To characterize structure and phase transitions - both first and second order - in the studied alloys XRD, TEM, SEM, MFM, VSM, PAS, DSC techniques were used. Considerable emphasis is placed on in situ neutron diffraction tests that were performed with the same heating and cooling rates as the internal friction measurements. Different types of mechanical spectroscopy techniques were used to study mainly, but not exclusively, Fe-Al, Fe-Ga and Fe-Ge based alloys: from subresonance “low” frequency forced bending and torsion vibrations (0.00001 to 200 Hz) to “high” frequency resonance (above ~200 Hz) free decay bending vibrations. We discuss (1) thermally activated effects like Snoek-type relaxation, caused by interstitial atom jumps in alloyed ferrite, (2) Zener relaxation, caused by reorientation of pairs of substitute atoms in iron, (3) different transient effects due to phase transitions of the first and second order, and (4) amplitude dependent magneto-mechanical damping; especially with respect to structure, ordering of substitutional solid solution and phase transitions. Special attention is paid to magnetostriction of the alloys - the result of magneto-mechanical elastic coupling.

Intermetallics Research Progress

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Author : Yakov N. Berdovsky
language : en
Publisher: Nova Publishers
Release Date : 2008

Intermetallics Research Progress written by Yakov N. Berdovsky and has been published by Nova Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.

Intermetallics is concerned with all aspects of ordered chemical compounds between two or more metals and notably with their applications. This book covers new and important research on the crystal chemistry and bonding theory of intermetallics; determination and analysis of phase diagrams; the nature of superlattices, antiphase domains and order-disorder transitions; the geometry and dynamics of dislocations and related defects in intermetallics; theory and experiments relating to flow stress, work-hardening, fatigue and creep; response of deformed intermetallics to annealing; magnetic and electrical properties of intermetallics; structure and properties of grain and interphase boundaries; the effect of deviations from stoichiometry on physical and mechanical properties; crystallisation of intermetallics from the melt or amorphous precursors.