Titlebook: Ordering and Disordering in Alloys; A. R. Yavari Book 1992 Elsevier Science Publishers Ltd 1992 diffraction.diffusion.materials.mechanisms

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Allodynia

Calorimetric Study of Reordering of Disordered L12, Ni3Al Based Alloysusly heated, a broad exothermic transformation after which the ordered Ll. phase is again obtained. The total enthalpy released in the transformation grows with the milling time..It is observed that other kinetic processes, apart from the ordering one, are involved in the broad exothermic transforma

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Order Parameter and Lattice Parameter in L12 Ordered Alloys, with Special Reference to Ni3Al-Based Adisordered state is achieved during this extreme form of cold-work by the creation of several kinds of defects; in particular vacancies and dislocations. The increase of anti-phase boundary density and the consequent reduction of ordered domain size are other aspects of the disordering process. The

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Ordering Kinetics in Superalloy Type Intermetallic Compounds in Relation with Diffusion Mechanismsprocess that can be compared to the energy of the interdiffusion. A systematic study of aluminide phases built either on a fcc (L1.) or bcc (DO.) lattice shows that quite different behaviours are observed in the two types of structure. In L1. phases, the role played by the ordering energy has been t

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Cardiac-Output

Structural Instabilities Associated with Phase Transitions an electron microscopy studyphase transitions. Such pretransition effects occur for diffusion controled as well as for diffusionless transformations..a) for diffusion controled transformations short range order (SRO) is formed when approaching the ordering temperature Tc from above while upon approaching Tc from below, interfa

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Electron Microscopy Investigation of Wetting Phenomena in L12 Alloysscopy. The study shows a typical wetting phenomenon at the order-disorder transition. At low temperature, the domain walls are perfectly thin and micro-faceted. Complete interfacial wetting by the disordered phase, characterized by a logarithmical divergence of the width of the walls, is shown to oc

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Long-Range Ordering Kinetics in Ni3Al-Based Alloys with Various Ordering Energies long-range ordering (LRO). The kinetics of L1. ordering was studied by means of in situ resistometry within the .’-phase of a quasi-binary system Ni.Al.Fe., where Tt drops drammatically with x..Experimental evidence of an increase of the LRO activation energy with increasing T. has been achieved. T

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Equilibrium and Kinetics of Thermal Ordering or Disordering in Ni3Almperature dependence of the equilibrium and kinetics of atomic order, in binary Ni.Al intermetallic compounds with 24.6 to 26.5 at% Al and in ternary materials with 4 at% Ti or Ta. In the binary alloys, the resistivity characterizing the equilibrium long-range order exhibits a positive temperature d

DECRY

Investigation of Deformation Induced Disorder and Re-Ordering by Subsequent Annealing in Ni3Al+Btment between 273 K and 1473 K of 40% rolled samples, hardness, yield-stress and the intensities of the superlattice reflections were measured and the microstructural evolution was investigated by TEM. The correlation between the measured property changes are discussed.