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Andreas Mortensen

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Publications associées (137)

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Age-Hardening Response of Replicated Microcellular Al-4.5%Cu

Andreas Mortensen, Yves Conde

We study the response to age hardening of Al-4.5%Cu replicated foams with 75 and 400 pm cell sizes and with varying relative densities. The 400 mu m cell size foams have a similar behavior to the bulk alloy, whereas the 75 pm cell size foams with relative ...

Destech Publications, Inc, 439 Duke Street, Lancaster, Pa 17602-4967 Usa2008

Permeability of open-pore microcellular materials

Andreas Mortensen, Jean-François Despois

2005

Activation volume in microcellular aluminium: Size effects in thermally activated plastic flow

Andreas Mortensen, Frédéric Diologent

Open-pore 99.99% pure Al and Al-5 wt.% Mg foam produced by replication, with pores either 400 or 75 gm in average diameter, are tested in compression with repeated relaxation cycles, at room temperature. Similar data are collected on pure aluminium. Estima ...

Elsevier2011

Influence of the wetting angle on capillary forces in pressure infiltration

Andreas Mortensen, Ludger Weber, Alain Léger

This work probes the influence of wetting on pressure infiltration. Pressure/saturation curves for the infiltration of packed F1000 angular alumina particle preforms by liquid Cu-Al and Sn-Al alloys are measured using an instrumented high-temperature press ...

Elsevier2015

Hole and notch sensitivity of aluminium replicated foam

Andreas Mortensen, Andreas Rossoll

The flow and failure behaviour of replicated pure aluminium foams in the presence of holes and notches is explored, varying the pore size and the notch depth or hole radius. Flat dog-bone tensile specimens containing a cylindrical hole, and cylindrical V-n ...

Elsevier2011

Young's modulus of ceramic particle reinforced aluminium: measurement by the Impulse Excitation Technique and confrontation with analytical models

Andreas Mortensen, Andreas Rossoll

2009

Equilibrium shape of a liquid intergranular inclusion in a stressed elastic solid

Andreas Mortensen, Vincent Laporte, Laurent Felberbaum

The influence of applied stress on the equilibrium shape of a liquid intergranular inclusion is derived to show that (i) results differ significantly from those for a void, and (ii) this difference explains the experimental data if liquid inclusions behave ...

2008

Laue microdiffraction characterisation of as-cast and tensile deformed Al microwires

Andreas Mortensen, Steven Van Petegem, Helena Van Swygenhoven, Léa Deillon, Suzanne Godelieve Alphonsine Verheyden

Single-crystalline cast aluminium microwires with a diameter near 15 are characterised by Laue microdiffraction. A microwire in the as-cast condition exhibits a misorientation below over a length of 500 . The measured density of geometrically necessary dis ...

TAYLOR & FRANCIS LTD2019

A method for cleaning flat punch diamond microprobe tips

Andreas Mortensen, Alejandra Inés Slagter, Joris Pierre Everaerts

Microprobe tips are commonly used to perform in-situ micromechanical tests within an electron microscope. In service, such tips have a tendency to accumulate along their surface a layer of deposited material. Tip cleanliness is crucial in order to obtain r ...

PERGAMON-ELSEVIER SCIENCE LTD2022

Intermittent tensile deformation of silver microcastings: Influence of the strain rate

Andreas Mortensen, Luciano Borasi

We compare the uniaxial tensile behavior of mu m-scale cast silver tensile specimens at strain rates of 10(-3 )s(-1) and 2 s(-1) to find no major impact of the strain rate on either of the flow stress, work hardening, or strain to fracture. Plastic deforma ...

Pergamon-Elsevier Science Ltd2023

Stress relaxation in the presence of sudden strain bursts: Methodology and stress relaxation data of microcast aluminium microwires

Andreas Mortensen, Léa Deillon

This data article presents a methodology and the corresponding code developed to perform and process stress relaxation tests where samples display superimposed (i) classical, continuous logarithmic relaxation together with (ii) sudden displacements manifes ...

2018

Surface oxide in replicated microcellular aluminium and its influence on the plasticity size effect

Andreas Mortensen, Frédéric Diologent

The oxide film present along the interface between metal and pores in microcellular aluminium produced by replication depends on the leaching medium that is used to dissolve the NaCl preform: leaching in water produces a thick and irregular multilayered hy ...

2009

Uniaxial deformation of microcellular metals

Andreas Mortensen, Jean-François Despois, Randoald Müller

2006

Direct measurement of drainage curves in infiltration of SiC particle preforms

Andreas Mortensen, Ludger Weber, Maryam Bahraini Hasani

Drainage curves (plots of the non-wetting fluid saturation versus applied pressure) for infiltration of SiC particle preforms with Al and Al-12.2 at.% Si are measured at 1023 K (750 degrees C) with a pressure infiltration apparatus adapted for direct track ...

2008

The local strength of microscopic alumina reinforcements

Andreas Mortensen, Marco Cantoni, Andreas Rossoll, Martin Guillermo Mueller, Václav Pejchal, Goran Zagar

We measure, using an adaptation of a method designed for ceramic ball bearings, the local strength of a brittle second phase that serves to reinforce a metal. The method uses focused ion beam milling and a nanoindentation device, and is free of artifacts c ...

Elsevier2015

Silicon particle pinhole defects in aluminium–silicon alloys

Andreas Mortensen, Marta Fornabaio, Martin Guillermo Mueller

It was recently shown that silicon particles in heat-treated Al–Si casting alloys can contain flaws such as surface pinholes and grooves, which cause varying degrees of reduction in the in situ particle fracture strength and hence influence the mechanical ...

Springer Verlag2017

Influence of quench rate and microstructure on bendability of AA6016 aluminum alloys

Andreas Mortensen, Andreas Rossoll, Frédéric Diologent, Jean-François Despois

The influence of the quench rate after solution treatment on the bendability of AA6016 aluminum alloy sheets was investigated. Crack initiation during bending tests is found to be independent of quench rate whereas crack propagation is decreased after rapi ...

Elsevier2013

Small-scale metal castings, small-scale metal/transparent composite structures and process to produce same

Andreas Mortensen, Yves Bellouard, Raphaël Charvet, Cyril Henri Dénéréaz

The method comprises at least the following steps: - exposing a substrate to focused laser irradiation at a preselected series of locations that trace a subset of the substrate volume that is connected to the surface of the substrate; some subsets of subst ...

2017

Infiltration of graphite preforms with Al-Si eutectic alloy and mercury

Andreas Mortensen, Ludger Weber, Maryam Bahraini Hasani

2007

Processing of Ag-Cu alloy foam by the replication process

Andreas Mortensen, Ludger Weber, Frédéric Diologent, Vincent Laporte, Fabien Duc

Particulate reinforced material ...

2009