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Concept

Laser peening

Publications associées (30)

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

Roland Logé, Nikola Kalentics

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

Enhanced precipitate growth at reduced temperatures during chemical ordering in deformed red gold alloys

Nadine Baluc, Steven Van Petegem, Helena Van Swygenhoven, Samy Hocine, Marina Garcia Gonzalez

Manufacturing of red gold components relies widely on controlling the formation of ordered precipitates during thermo-mechanical processing. The ordered phase hardens the material, makes it less workable and introduces residual stresses. We show that an in ...

PERGAMON-ELSEVIER SCIENCE 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

From experimental evidence to mechanical modeling and design expressions: The Critical Shear Crack Theory for shear design

Aurelio Muttoni, Miguel Fernández Ruiz

Many research efforts have so far been devoted to the topic of shear design of members without transverse reinforcement since the first development in structural concrete. This has allowed a number of significant advances in the understanding of the phenom ...

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

A mechanical model for failures in shear of members without transverse reinforcement based on development of a critical shear crack

Aurelio Muttoni, Miguel Fernández Ruiz, Francesco Cavagnis

In this paper, a mechanical model consistent with the main assumptions of the Critical Shear Crack Theory (CSCT) is proposed for shear design of slender concrete members without shear reinforcement. To that aim, the shear force that can be transferred thro ...

2018

Additive Fabrication of Silicon Pillars on Monocrystalline Silicon by Direct Laser Melting

Marie Camille Laëtitia Le Dantec

Additive Manufacturing (AM) is an emerging part production technology that offers many ad-vantages such as high degree of customization, material savings and design of 3D highly complex structures. However, AM is a complex multiphysics process. Therefore, ...

EPFL2018

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

3D Laser Shock Peening – A new method for the 3D control of residual stresses in Selective Laser Melting

Roland Logé, Christian Leinenbach, Jamasp Jhabvala, Eric Boillat, Nikola Kalentics

This paper describes a hybrid additive manufacturing process – 3D Laser Shock Peening (3D LSP), based on the integration of Laser Shock Peening (LSP) with selective laser melting (SLM). The well-known tensile residual stresses (TRS) in the as – built (AB) ...

Elsevier Sci Ltd2017