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Papers by Author: Alain Reza Yavari

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Milling and Consolidation by Hot Rolling of Al-Fe-Cr Alloy

Authors: C.A.D. Rodrigues, G. Tremiliosi-Filho, J.M.D.A. Rollo, Alain Reza Yavari, Claudio Shyinti Kiminami, Walter José Botta Filho

Abstract: This paper discusses the preparation of partially amorphous Al90Fe5Cr5 and Al90Fe7Cr3 powder alloys by mechanical milling and their subsequent consolidation by hot milling. Samples milled for 60 hours showed a microstructure composed of amorphous phase and nanocrystalline Al. The heat treatment of these powders resulted in the equilibrium phases: fcc-Al + (Al3Fe and Al5Cr intermetallic phases). Hot rolling these powders at 430°C resulted in consolidated samples with a fine microstructure composed of Al, Al3Fe and Al5Cr intermetallic phases and high porosity. The high hardness values of about 417HV of the intermetallic compounds formed during the rolling process presented the main obstacle to obtaining totally homogenous and consolidated samples.

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On the Structural Relaxation and Nanoindentation Studies of Changes in Free Volume in Zr-Based Bulk Metallic Glasses

Authors: Tarek Benameur, Alain Reza Yavari, Akihisa Inoue, B. Guelorget

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Frictional Behavior of Nanocrystalline-Amorphous Duplex Microstructures of Zr-Based Metallic Glass: An Atomic Force Microscopy Analysis

Authors: Tarek Benameur, K. Gammoudi, Alain Reza Yavari, Akihisa Inoue

479

Electrochemical Storage of Hydrogen in Mg-Nanocomposites: Influence of the FeF₃ Catalyst

Authors: Christiane Poinsignon, Ana Borissova, J.F.R. de Castro, François Aguey, Alain Reza Yavari

311

Transition Metal and Transition Metal Fluorides as Catalysts in MgH₂-Based Nanocomposites

Authors: Walter José Botta Filho, J.F.R. de Castro, G. Vaughan, Alain Reza Yavari

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Glass Transition T_g and Thermal Expansion in Glassy Materials Measured by Time-Resolved X-Ray Diffraction

Authors: K. Ota, K. Hajlaoui, G. Vaughan, Marco Di Michiel, Dmitri V. Louzguine-Luzgin, Akihisa Inoue, Alain Reza Yavari

225

Short-Range Order in Pd_42.5Cu₃₀Ni_7.5P₂₀ Bulk and Ribbon Metallic Glasses

Authors: Elena V. Levchenko, N. Lupu, A. Le Moulec, Eiichiro Matsubara, G. Vaughan, A. Kvick, Akihisa Inoue, Alain Reza Yavari

Order/Disorder Transformations in Spray Formed FeSiAl Alloys

Authors: A.H. Kasama, Rogério Machado, Alain Reza Yavari, G. Vaughan, Claudemiro Bolfarini, Claudio Shyinti Kiminami, Walter José Botta Filho

553

Synchrotron Radiation and Instrumented Indentation Studies of Compressive Plastic Deformation in Zr-Based Bulk Metallic Glasses

Authors: Tarek Benameur, K. Hajlaoui, Alain Reza Yavari, B. Guelorget, Manuel François

425

Two Routes to Process the Mg-5at.%Nb Nanocomposite

Authors: J.F.R. de Castro, A.L.M. Costa, S.F. Santos, Walter José Botta Filho, Tomaz Toshimi Ishikawa, Alain Reza Yavari

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