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Related publications (47)

In situ X-ray Diffraction during Casting: Study of Hot Tearing in Al-Zn alloys

Jean-Marie Drezet, Güven Kurtuldu, Bastien Gilbert Pierre Mireux

During solidification of metallic alloys, coalescence corresponds to the formation of solid bridges between grains when both solid and liquid phases are percolated. As such, it represents a key transition with respect to the mechanical behaviour of solidif ...

Trans Tech Publications Switzerland2015

Lithography: Hybrid Helical Magnetic Microrobots Obtained by 3D Template-Assisted Electrodeposition (Small 7/2014)

Mahmut Selman Sakar, Berna Ayse Özkale Edelmann

Hybrid artificial flagella (h-ABF) consisting of a ferromagnetic alloy head and a helical polymer tail can be fabricated by sequential electrodeposition of a cobalt-nickel alloy and polypyrrole inside a photoresist template patterned by 3D laser lithograph ...

Wiley-Blackwell2014

Factors affecting subject-specific finite element models of implant-fitted rat bone specimens: critical analysis of a technical protocol

John Botsis, Joël Cugnoni, Marco Piccinini

The authors propose a protocol to derive finite element (FE) models from micro computer tomography scans of implanted rat bone. A semi-automatic procedure allows segmenting the images using specimen-specific bone mineral density (BMD) thresholds. An open-s ...

Taylor & Francis2014

NEUTRON DIFFRACTION MEASUREMENT OF AS-CAST RESIDUAL STRESSES IN AA7050 ROLLING PLATE INGOTS: INFLUENCE OF A WIPER

Jean-Marie Drezet

During casting, thermally induced deformations give birth to ingot distortions and residual stresses. For some high strength alloys, ingot cracking can happen during casting per se or during cooling down. Ingot distortions such as rolling face pull-in, but ...

John Grandfield2014

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

Effect of tool travel and rotation speeds on weld zone defects and joint strength of aluminium steel lap joints made by friction stir welding

Hossein Najafi

In this study, Al-5083 and St-12 alloy sheets were friction stir lap welded at different travel (7-23 cm min(-1)) and rotation (750-1125 rev min(-1)) speeds of the welding tool. The welded joints were characterised by various methods including shear tensil ...

2012

Al2O3 particle rounding in molten copper and Cu8wt%Al

Andreas Mortensen

We investigate processing-microstructure relationships in the production of Al2O3 particle reinforced copper composites by solidification processing. We show that during production of the composites by gas-pressure infiltration of packed Al2O3 particle pre ...

Springer US2012

Mechanical and electrochemical deterioration mechanisms in the tribocorrosion of Al alloys in NaCl and in NaNO3 solutions

Stefano Mischler

Tribocorrosion of Al-Si-Cu-Mg alloys was investigated in 0.05 M NaCl and 0.1 M NaNO3 solutions under severe sliding and controlled electrochemical conditions. A simple galvanic coupling model was developed to analyze and quantitatively predict the evolutio ...

Elsevier2012

Wear and frictional mechanisms of copper-based bearing alloys

Stefano Mischler

The present study investigated the role of alloy microstructure and surface roughness on wear and friction behavior of leaded and unleaded tin bronzes. Ball-on-disk experiments were carried out under dry conditions with steel balls sliding against bronze d ...

2011

Effects of Ni additions, trace elements and solidification kinetics on microstructure formation in Sn-0.7Cu solder

Michel Rappaz, Tina Ventura

Five ternary Sn-0.7Cu-xNi alloys with nickel contents in the range 0-1000 ppm have been directionally solidified at different growth rates. The competition between primary tetragonal Sn cells/dendrites, eutectic and primary Cu6Sn5 is interpreted with phase ...

Elsevier2011

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