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On a metastable miscibility gap in γ-Mn-Cu alloys and the origin of their high damping capacity
J. M. Vitek,H. Warlimont +1 more
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In this paper, a metastable miscibility gap has been found which explains the decomposition behavior of γ-Mn-Cu alloys, and a tweed structure was observed which coarsened upon annealing.Abstract:
A metastable miscibility gap has been found which explains the decomposition behaviour of γ-Mn-Cu alloys. Hardness measurements as well as results of other authors were used to outline the boundaries of the two-phase region. Electron microscopy provided direct evidence for the phase separation prior to α-Mn precipitation. A tweed structure was observed which coarsened upon annealing. The existence of the miscibility gap gives rise to the observed increase of the Neel temperature upon annealing as well as to the microstructural changes affecting the variations in specific damping capacity upon ageing, i.e. an initial increase and subsequent decrease of the damping capacity with ageing time.read more
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Coupled phase diagrams and thermochemical data for transition metal binary systems-VI
Larry Kaufman,Harvey Nesor +1 more
TL;DR: In this article, a data base covering the transition metals has been developed which permits coupling of thermochemical and phase diagram data and can readily be employed to compute ternary and higher order systems.
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Enthalpies of formation of liquid and solid binary alloys based on 3d metals: I. Alloys of scandium, titanium and vanadium
TL;DR: In this article, a complete set of binary phase diagrams based on Sc, Ti or V is presented in schematic form and compared with the existing experimental data as well as with qualitative information derived from phase diagram information.
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Phase equilibria and thermodynamics of binary copper systems with 3d-metals. I. The copper-scandium system
TL;DR: In this article, a self-consistent set of thermodynamic parameters was obtained using data on the mixing enthalpy and information on the phase equilibria, and the thermodynamic properties of the phases and the phase diagram along with its metastable extension were calculated using this set of parameters.
Journal ArticleDOI
Enthalpies of formation of liquid and solid binary alloys based on 3d metals: II alloys of chromium and manganese
TL;DR: In this paper, a model for the formation of binary intermetallic compounds of Cr and Mn with arbitrary metal partners is presented, and the effect of the magnetic properties on the enthalpies of formation is discussed.
Journal ArticleDOI
Phase decomposition of the γ phase in a Mn–30 at.% Cu alloy during aging
TL;DR: In this paper, the phase decomposition process of γ phase in a Mn 30 at.% Cu alloy, when aged at 723 K from 2 to 50h, was investigated with electrical resistivity and magnetic susceptibility measurement.
References
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Journal ArticleDOI
The antiferromagnetism of manganese copper alloys
TL;DR: In this paper, an electron band model of an antiferromagnetic metal has been used to determine the magnetic moments of manganese ions in pure and plastically strained specimens, where compressive stress results in alinement of the c axes of the crystallites along the [100]-type direction most nearly parallel to the stress axis.
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Electron Microscope Transmission Images of Coherent Domain Boundaries I. Dynamical Theory
TL;DR: In this paper, the properties of the fringe patterns associated with coherent domain boundaries are discussed in detail on the basis of a model in which the crystal consists of two regions which have slightly different diffraction conditions, characterized by two different s-values.
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Decomposition of Gamma‐Phase Manganese Copper Alloys
J. H. Smith,E. R. Vance +1 more
TL;DR: In this paper, the effects of aging at other temperatures, and the behavior of furnace-cooled alloys are discussed in terms of the pre-precipitation of manganese-rich clusters.
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Effect of Composition on the Internal Friction and Young's Modulus in γ Phase Mn-Cu Alloys
TL;DR: In this article, a detailed investigation was made regarding the variation in internal friction and Young's modulus with temperature in manganese-copper alloys containing 11.74-26.08 wt.-% Cu.