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Publications associées (206)

Prediction of Hot Tear Formation in Vertical DC Casting of Aluminum Billets Using a Granular Approach

Michel Rappaz, Jean-Marie Drezet, André Phillion, Meisam Sistaninia

A coupled hydromechanical granular model aimed at predicting hot tear formation and stress-strain behavior in metallic alloys during solidification is applied to the semicontinuous direct chill casting of aluminum alloy round billets. This granular model c ...

Springer2013

Interaction between liquid aluminium and solid iron Al-rich intermetallics formation

Guillaume Pasche

Intermetallic phases formation is one of the phenomena, which when coupled to thermal and mechanical strains leads to the premature wear of aluminium die casting tools made out of steel. This work focuses on two aspects of this wear problem. The first and ...

EPFL2013

Mechanisms and critical properties in drying shrinkage of soils: experimental and numerical parametric studies

Lyesse Laloui, Hervé Péron

Mechanisms of free-shrinkage strains of desiccating deformable initially saturated soils are studied. The role of the surface evaporation rate, surface tension and viscosity of pore fluid, and soil compressibility and permeability is investigated in experi ...

National Research Council Canada2013

Modeling of peritectic coupled growth in Cu-Sn alloys

Michel Rappaz, Jonas Valloton, Jonathan Dantzig

In directional solidification experiments on hypoperitectic Cu-Sn alloys at low velocity and high thermal gradient, both lamellar and fibrous coupled peritectic growth patterns have been observed. Two phenomena that had not been observed in previous experi ...

Elsevier2013

Prediction of self-desiccation in low water-to-cement ratio pastes based on pore structure evolution

Karen Scrivener, Hui Chen, Pietro Lura

High-performance concrete is sensitive to early-age cracking, mainly due to its rapidly-developing autogenous shrinkage. Autogenous shrinkage and internal relative humidity (RH) decrease are direct consequences of the emptying of capillary pores due to cem ...

Pergamon-Elsevier Science Ltd2013

Multi-Scale Approach to Cracking Criteria for Drying Silty Soils

Lyesse Laloui, Mohammad Monfared

Cracking is a most unwanted development in soil structures undergoing periodic drying. Desiccation cracking arises in the apparent absence of external forces. Hence, either an internal, self equilibrated stress pattern resulting from kinematic incompatibil ...

American Society of Civil Engineers2013

Highly catalytic carbon nanotube counter electrode on plastic for dye solar cells utilizing cobalt-based redox mediator

Ulf Anders Hagfeldt

A flexible, slightly transparent and metal-free random network of single-walled C nanotubes (SWCNTs) on plain polyethylene terephthalate (PET) plastic substrate outperformed Pt on conductive glass and on plastic as the counter electrode (CE) of a dye solar ...

2013

Thermo-mechanical modeling of dendrite deformation in continuous casting of steel

Jean-Marie Drezet, Andreas Ludwig

In the field of modern steelmaking, continuous casting has become the major manufacturing process to handle a wide range of steel grades. An important criterion characterizing the quality of semi-finished cast products is the macrosegregation forming at th ...

2012

HOT TEARING SUSCEPTIBILITY IN DC CAST ALUMINUM ALLOYS

Jean-Marie Drezet, André Phillion

Hot tearing and loss of dimensional stability are two key defects related to industrial aluminum alloy casting processes. In order to investigate their occurrence, a new semi-solid constitutive law [20] for AA5182 that takes into account cooling rate, grai ...

TMS (The Minerals, Metals & Materials Society)2012

Heterogeneous material micro-transfer by ink-jet print assisted mould filling

Jürgen Brugger, Grégoire Maxime Smolik, Loïc Jacot-Descombes, Vaida Auzelyte

A novel combination of ink-jet printing (IJP) and micro-transfer moulding (μ-TM) for high-resolution, heterogeneous material microstructuring is demonstrated. First, IJP is used to accurately fill the micro-cavities in an elastomeric mould, thus avoiding t ...

Elsevier2012

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