Advanced Engineering Materials

Cover image for Vol. 13 Issue 7

Special Issue: Materials Process Engineering: Nantes 2010

July, 2011

Volume 13, Issue 7

Pages 531–620

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Communications
    1. (Adv. Eng. Mater. 7/2011)

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/adem.201190018

      Thumbnail image of graphical abstract

      The cover shows the predicted velocity of the liquid steel along with the argon in a vertical plane passing through the porous plugs. Further details can be found in the article by Bellot et.al. on page 543.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Communications
    1. (Adv. Eng. Mater. 7/2011) (pages 531–535)

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/adem.201190017

  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Communications
    1. Materials Process Engineering: Nantes 2010 (page 537)

      Jean-Pierre Bellot and Frédéric Bernard

      Version of Record online: 20 JUN 2011 | DOI: 10.1002/adem.201100134

  4. Communications

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Communications
    1. Multiphase Model for Predicting the Elimination of Inclusions inside a Liquid-Steel Ladle (pages 538–542)

      Pascal Gardin, Ségolène Gauthier, Marie Simonnet and Jean Lehmann

      Version of Record online: 15 APR 2011 | DOI: 10.1002/adem.201000361

      Thumbnail image of graphical abstract

      Secondary metallurgy in steelmaking generates harmful non-metallic inclusions that are removed by injecting argon in the steel bath. The inclusions are transported by the flows induced by the rising argon bubbles and are absorbed by the slag layer on the top of the liquid bath. The paper describes the modeling of inclusion elimination by the different fluid phases.

    2. 3D Modeling of the Aggregation of Oxide Inclusions in a Liquid Steel Ladle: Two Numerical Approaches (pages 543–549)

      Ismael Lis Alves Daoud, Nicolas Rimbert, Alain Jardy, Benoît Oesterlé, Stéphane Hans and Jean-Pierre Bellot

      Version of Record online: 11 APR 2011 | DOI: 10.1002/adem.201000355

      Thumbnail image of graphical abstract

      The balanced equation for a population of oxide inclusions in a gas stirred ladle with aggregation mechanism is coupled with hydrodynamic modeling. To obtain the solution of this equation two approaches are used: the classes-method (CM) and the QMOM. The simulation results show the equivalence of these methods and their respective advantages are presented.

    3. Physical Modeling of Inclusion Approach to the Steel–Slag Interface with Focus on Hydrodynamic Interactions (pages 550–555)

      Yassine Ferchichi and Hervé Duval

      Version of Record online: 6 MAY 2011 | DOI: 10.1002/adem.201000357

      Thumbnail image of graphical abstract

      Hydrodynamic interactions between a polymer sphere and a glycerin/silicone oil interface is investigated experimentally. It is found that the variations of the hydrodynamic correction factor as a function of the particle-to-interface distance depends essentially on the capillary number and on the viscosity ratio: the range of the hydrodynamic interactions increases for larger viscosity ratios and smaller capillary numbers.

    4. Interface, Flows and Transfer in an Electromagnetic Process Devoted to Liquid/Liquid Extraction (pages 556–562)

      Cyril Courtessole and Jacqueline Etay

      Version of Record online: 18 APR 2011 | DOI: 10.1002/adem.201000352

      Thumbnail image of graphical abstract

      During recent years, the SIMAP laboratory has performed a large number of theoretical/experimental studies on the oscillation of surfaces or interfaces under the action of two-frequency induction. The work reported here is based on the specific case of an Sb/LiF system aimed at modelling a nuclear reactor using molten salts.

    5. On the Formation of White-Spot Defects in a Superalloy VAR Ingot (pages 563–569)

      Jean François Grignard, Aude Soller, Julien Jourdan, Jean-Pierre Bellot and Alain Jardy

      Version of Record online: 15 APR 2011 | DOI: 10.1002/adem.201000366

      Thumbnail image of graphical abstract

      For the production of nickel-based superalloys for the aerospace industry, strict control of the macrostructure of the product is necessary to avoid the appearance of potentially fatal defects. Our study focuses on the prevention of “white spots” in VAR IN 718 ingots and intends to determine the origins of this defect as well as its melting kinetics.

    6. Influence of Transport Mechanisms on Macrosegregation Formation in Direct Chill Cast Industrial Scale Aluminum Alloy Ingots (pages 570–580)

      Miha Založnik, Arvind Kumar, Hervé Combeau, Marie Bedel, Philippe Jarry and Emmanuel Waz

      Version of Record online: 12 APR 2011 | DOI: 10.1002/adem.201000341

      Thumbnail image of graphical abstract

      The formation of macrosegregation in direct chill casting of a 7449 aluminum alloy is investigated with a multiscale solidification model. The model describes the nucleation on grain refiner particles, and the growth, motion and packing of free-floating globular grains, and accounts for all couplings between these phenomena. The interactions of the solute transport by grain motion, natural convection and shrinkage-induced flow and their role in the formation of macrosegregation are analyzed.

    7. Spark Plasma Sintering of a Zr-Based Metallic Glass (pages 581–586)

      Loïc Perrière, Minh Thanh Thai, Sandrine Tusseau-Nenez, Marc Blétry and Yannick Champion

      Version of Record online: 18 MAR 2011 | DOI: 10.1002/adem.201000334

      Thumbnail image of graphical abstract

      Study of the SPS of a Zr-based metallic glass reveals that spark plasma sintering induces local and partial devitrification of the amorphous alloy, as observed in the TEM image. From detailed structural and process analyses of sintered samples, an approach of the spark plasma sintering mechanism of metallic glasses is proposed.

    8. A Numerical Model for Powder Densification by SPS Technique (pages 587–593)

      Pamela Mondalek, Luisa Silva and Michel Bellet

      Version of Record online: 10 MAR 2011 | DOI: 10.1002/adem.201000340

      Thumbnail image of graphical abstract

      Spark plasma sintering belongs to a class of sintering techniques that employs electric current to assist compaction. The present paper addresses the numerical modelling of the coupled electrical, thermal and mechanical problems. The general set of equations is described; the effect of the powder physical properties and of the set up geometry on the distribution of electrical current and temperature is discussed. A macroscopic Abouaf constitutive model is used to simulate powder densification.

    9. Interface Reactivity and Induced Phenomena during Sintering in a Model Steel/Cemented Carbide Bimaterial (pages 594–598)

      Aurélie Thomazic, Céline Pascal and Jean-Marc Chaix

      Version of Record online: 2 MAY 2011 | DOI: 10.1002/adem.201000343

      Thumbnail image of graphical abstract

      During sintering of bimaterials, the interface region is thermodynamically far from equilibrium. An accurate knowledge and control of chemical interactions is therefore required, since diffusion, phase formation, etc. occur and influence the sintering of the bulks far from interface. This is illustrated in the case of a WC base cemented carbide/Fe–W–C steel model bimaterial, in which uncontrolled interface phenomena can induce second phase carbide formation at the interface, and liquid migration and macroscopic changes in the sample.

    10. ZrC[BOND]SiC Materials from the Polymer-Derived Ceramics Route (pages 599–603)

      David Pizon, Romain Lucas, Sylvie Foucaud and Alexandre Maître

      Version of Record online: 17 MAR 2011 | DOI: 10.1002/adem.201000336

      Thumbnail image of graphical abstract

      A polymer-derived ceramic route was investigated to manufacture new ZrCSiCp composites. After heat treatment until 1400°C, XRD analysis indicated the formation of a β-SiC phase in the presence of ZrC. The results were compared with a commercial polycarbosilane, and revealed, in the case of a synthesized poly(methylvinylsilane) precursor, an improved homogeneity in the final microstructure. The use of a suitable organic polymer coating could be a promising way to the elaboration of high performance ceramics.

    11. Simulations of an Infrared Composite Curing Process (pages 604–608)

      Sawsane Nakouzi, Johann Pancrace, Fabrice Schmidt, Yannick Le Maoult and Florentin Berthet

      Version of Record online: 19 MAY 2011 | DOI: 10.1002/adem.201000344

      Thumbnail image of graphical abstract

      Infrared energy is used to manufacture the composite. In this process, composite is placed in the IR oven. Liquid resin is infused through the reinforcement due to the vacuum pump. IR heat flux that impacts the top surface of the composite is computed using a ray-tracing method. This heat flux is used as a boundary condition in the finite element software COMSOL where the heat balance equation is coupled with the exothermic heat released from the resin. The temperature distribution in the composite is predicted and validated with the experimental results.

    12. Ultrafine Grinding of Oxide Powders with a Controlled Viscosity of Slurries (pages 609–615)

      David Houivet, Regis Quercioli, Brahim Itaalit, Ahmad Kassas, Alexis Ngueteu Kamlo, Jerome Bernard and Jean-Marie Haussonne

      Version of Record online: 13 MAY 2011 | DOI: 10.1002/adem.201000356

      Thumbnail image of graphical abstract

      This study shows the importance of controlling the rheological behavior of slurries during attrition milling in aqueous media. First, we determine the optimum dispersion conditions to obtain deflocculated slurries. Second, we preserve this deflocculated state of dispersion throughout the milling process. We apply this concept for the grinding of TiO2 and Al2O3 powders.

    13. Analysis of Ball-Milled ZrAlNiCu Bulk Metallic Glass Powders (pages 616–620)

      Jiang Wu, Samuel Margueron, Nathalie Allain-Bonasso, Patrice Bourson, Eric Gaffet, Chuang Dong and Thierry Grosdidier

      Version of Record online: 3 JUN 2011 | DOI: 10.1002/adem.201000339

      Thumbnail image of graphical abstract

      The crystallization of Zr65Al7.5Ni10Cu17.5 (Z1) and Zr58Al16Ni11Cu15 (Z2) metallic glasses is investigated. The thermal crystallization end-products of the two alloys are different: tetragonal Zr2Cu and hexagonal Zr6Al2Ni for Z1, while Z2 contained hexagonal Zr2Al, big cubic Zr2Ni and some α-Zr solid solution. Comparatively, their milled-induced crystallization product is identical: a FCC phase for both alloys. Raman spectroscopy suggests that nitrogen has an effect on the formation of this stable final product.

SEARCH

SEARCH BY CITATION