Publications de Frédéric Diologent

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

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

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

Fracture of convoluted and lamellar α2 + γ TiAl alloys

Andreas Mortensen, Frédéric Diologent, Nicolas Vincent Barbi

Fracture toughness tests are conducted at room temperature and 923 K (650 degrees C) on SENB (Single Edge Notched Bend) specimens of three different (alpha(2) + gamma ) TiAl-based alloys. One alloy is a conventional near fully lamellar Ti-45Al-2Mn-2Nb + 0. ...

Elsevier2012

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

Creep of replicated microcellular aluminium

Andreas Mortensen, Frédéric Diologent, Sébastien Philippe Soubielle

Open-pore replicated microcellular 99.99% pure aluminium is tested in tensile creep, varying the temperature from 150 to 450 degrees C, the applied stress from 0.15 to 0.5 MPa, and the relative density from 0.14 to 0.28. Tensile creep curves are of classic ...

Elsevier2011

Solid state transformations of Au-Cu-Pt alloys studied by in-situ X-ray synchrotron radiation and DSC

Andreas Mortensen, Frédéric Diologent, Edwina Klay

Seven alloys of the ternary Au-Cu-Pt system, containing 75 or 76.5 wt.% Au with 0-15 wt.% Pt and heat-treated to a fully ordered condition, are examined using in-situ synchrotron radiation to determine transformation temperatures and phases formed, and to ...

Elsevier2011

Fatigue and cyclic creep of replicated microcellular aluminium

Andreas Mortensen, Frédéric Diologent, Sébastien Philippe Soubielle

The cyclic behaviour of 400 mu m pore size replicated aluminium foam is assessed in tension-tension fatigue with a stress ratio equal to 0.1, keeping the load amplitude constant, for relative density values comprised between 0.175 and 0.220. The number of ...

Elsevier2011

L10 nanotwinned gold-rich Au–Cu–Pt

Andreas Mortensen, Frédéric Diologent, Edwina Klay

Ternary Au-Cu-Pt alloys, of unequal gold and copper atomic contents and containing 2.5 wt.% Pt, are ordered isothermally at 250 or 400 degrees C after annealing at 650 degrees C and quenching in water. The alloys are characterized by transmission electron ...

Elsevier2011

Influence of chemistry and microstructure on the activation volume of TiAl alloys

Andreas Mortensen, Frédéric Diologent, Luc Rougier, Nicolas Vincent Barbi

Repeated stress-relaxation experiments are conducted from RT to 1073 K on three different gamma + alpha(2) TiAl alloys (Ti-46Al with 8Ta, 8Nb or 7Nb) One is a conventional duplex alloy, the two other are novel "convoluted" cast titanium aluminides develope ...

Elsevier2010

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

Processing of Ag-Cu alloy foam by the replication process

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

Particulate reinforced material ...

2009