Publications related to Investigation of the effect of Laser Shock Peening in Additively Manufactured samples through Bragg Edge Neutron Imaging

3D laser shock peening - A new method for improving fatigue properties of selective laser melted parts

Roland Logé, Christian Leinenbach, Nikola Kalentics, Manuel Ortega Varela De Seijas

Although Selective Laser Melting (SLM) currently revolutionizes the way parts are being manufactured, certain process inherent limitations such as accumulation of residual stresses and increased porosity content can lead to a decrease in fatigue life of pr ...

ELSEVIER2020

Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

Alain Nussbaumer, Heikki Tapani Remes, Halid Can Yildirim

In HSS welded structures, HFMI allows fatigue strength improvement factors by inducing compressive residual stresses, cold-worked surface region and modifying the weld toe shape. According to the literature, the factors are proposed based on failures at CA ...

2020

The mechanics of crack-tip dislocation emission and twinning

Predrag Andric

Dislocation emission from a crack tip is a necessary mechanism for crack tip blunting and toughening. A material is intrinsically ductile under Mode I loading when the critical stress intensity

K_{Ie}

for dislocation emission is lower than the critical s ...

EPFL2019

3D laser shock peening as a way to improve geometrical accuracy in selective laser melting

Roland Logé, Nikola Kalentics, Andreas Burn, Michael Cloots

One of the major drawbacks of selective laser melting (SLM) is the accumulation of tensile residual stresses (TRS) in the surface and subsurface zones of produced parts which can lead to cracking, delamination, geometrical distortions, and a decrease in fa ...

SPRINGER LONDON LTD2019

Residual stresses of friction melt bonded aluminum/steel joints determined by neutron diffraction

Jean-Marie Drezet

Near interfacial residual stresses are investigated in a joint composed of aluminum alloy and dual phase steel. A small step neutron diffraction scan was initially performed to determine the weld interface position along the measured transverse cross secti ...

ELSEVIER SCIENCE SA2019

Nanoscale Depth Profiling of Residual Stresses Due to Fine Surface Finishing

Joris Pierre Everaerts

Mechanical polishing is commonly used for both surface finishing and metallographic sample preparation for a broad range of materials. However, polishing causes local deformation and induces residual stress, which has an important effect on many surface ph ...

2019

Mechanical properties of thermally grown submicron oxide layers on a nickel-based superalloy

Joris Pierre Everaerts, Wei Li

Nickel-based superalloys are frequently used under operating conditions that lead to the formation of an oxide layer. In this study, the mechanical properties of such a submicron oxide scale formed on a nickel-based superalloy were evaluated. The Poisson’s ...

2019

A new hybrid Additive Manufacturing process combining Selective Laser Melting and Laser Shock Peening

Nikola Kalentics

Additive Manufacturing (AM) in whole and especially Selective Laser Melting (SLM) are already making a revolution in the way parts are designed and manufactured with the ability to produce lightweight parts with unprecedented complex geometries which are o ...

EPFL2018

Effect of Loading Pattern on Fatigue Behavior of Laminated Composites

Thomas Keller, Anastasios Vassilopoulos, Abdolvahid Movahedirad

The effect of load interruptions on the fatigue behavior of (±45)2s angle-ply glass/epoxy composite laminates was investigated in this work. Constant amplitude fatigue experiments were performed at different stress levels to derive base line fatigue data. ...

MDPI2018

Tailoring residual stress profile of Selective Laser Melted parts byLaser Shock Peening

Roland Logé, Eric Boillat, Nikola Kalentics

The paper describes a new approach in controlling and tailoring residual stress profile of parts made bySelective Laser Melting (SLM). SLM parts are well known for the high tensile stresses in the as – built statein the surface or subsurface region. These ...

2017

Investigation of the effect of Laser Shock Peening in Additively Manufactured samples through Bragg Edge Neutron Imaging

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3D laser shock peening - A new method for improving fatigue properties of selective laser melted parts

Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

The mechanics of crack-tip dislocation emission and twinning

3D laser shock peening as a way to improve geometrical accuracy in selective laser melting

Residual stresses of friction melt bonded aluminum/steel joints determined by neutron diffraction

Nanoscale Depth Profiling of Residual Stresses Due to Fine Surface Finishing

Mechanical properties of thermally grown submicron oxide layers on a nickel-based superalloy

A new hybrid Additive Manufacturing process combining Selective Laser Melting and Laser Shock Peening

Effect of Loading Pattern on Fatigue Behavior of Laminated Composites

Tailoring residual stress profile of Selective Laser Melted parts byLaser Shock Peening

Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

3D laser shock peening - A new method for improving fatigue properties of selective laser melted parts

3D laser shock peening as a way to improve geometrical accuracy in selective laser melting

Mechanical properties of thermally grown submicron oxide layers on a nickel-based superalloy

A new hybrid Additive Manufacturing process combining Selective Laser Melting and Laser Shock Peening

Tailoring residual stress profile of Selective Laser Melted parts byLaser Shock Peening

The mechanics of crack-tip dislocation emission and twinning

Nanoscale Depth Profiling of Residual Stresses Due to Fine Surface Finishing

Effect of Loading Pattern on Fatigue Behavior of Laminated Composites

Residual stresses of friction melt bonded aluminum/steel joints determined by neutron diffraction