Publications de Eric Boillat | EPFL Graph Search

Avoiding cracks in multi-material printing by combining laser powder bed fusion with metallic foils: Application to Ti6Al4V-AlSi12 structures

Eric Boillat, Jamasp Jhabvala, Roland Logé

Laser powder bed fusion (LPBF) as an additive manufacturing (AM) technology has emerged as a powerful platform for producing multi-material metallic structures. The main drawbacks of using metallic powders for multi-material printing are related to technic ...

2025

Toward Architected Microstructures Using Advanced Laser Beam Shaping in Laser Powder Bed Fusion of Ti-6al-4v

Mathijs Pieter van der Meer, Eric Boillat, Cyril Cayron, Jamasp Jhabvala, Roland Logé, Junfeng Xiao

Laser Powder Bed Fusion (LPBF) stations mostly use lasers with a Gaussian beam intensity distribution, as it has advantages like small divergence and high ability to be focused. This distribution creates significant thermal gradients leading to high coolin ...

WILEY-V C H VERLAG GMBH2025

Fast and accurate laser powder bed fusion metamodels predicting melt pool dimensions, effective laser absorptivity and lack of fusion defects

Eric Boillat, Jamasp Jhabvala, Roland Logé, Milad Hamidi Nasab

The significant computational expenses associated with simulating the Laser Powder Bed Fusion (LPBF) process often restrict the insights gained from modeling endeavors to specific combinations of process parameters, hindering broader conclusions. In this s ...

2025

Understanding variant selection and texture in additively manufactured red-gold alloys

Eric Boillat, Cyril Cayron, Jamasp Jhabvala, Roland Logé, Hossein Ghasemi Tabasi

Printing gold alloys parts is a challenge due to the high reflectivity and thermal conductivity of these materials. Recent studies show an improvement in printing gold using the Laser Powder Bed Fusion (L-PBF) process; however, the impact of the A1 -> L1(0 ...

PERGAMON-ELSEVIER SCIENCE LTD2022

Thermal Modelling and Experimental Validation in the Perspective of Tool Steel Laser Polishing

Alexandre Masserey, Eric Boillat, Bastian Meylan

Laser polishing (LP) is a process that allows a significant reduction of the surface roughness of a metal workpiece via re-melting a shallow layer of material. However, the practical use of LP is limited due to the difficulty of satisfying the high surface ...

MDPI2022

Direct observation of crack formation mechanisms with operando Laser Powder Bed Fusion X-ray imaging

Eric Boillat, Jamasp Jhabvala, Helena Van Swygenhoven, Roland Logé, Samy Hocine, Hossein Ghasemi Tabasi, Navid Sohrabi

Laser powder bed fusion (L-PBF) is a versatile additive manufacturing process that can print geometrically complex metal parts for a variety of applications. However, poor control of defect formation during processing hampers its widespread industrial adop ...

ELSEVIER2022

An effective rule for translating optimal selective laser melting processing parameters from one material to another

Eric Boillat, Jamasp Jhabvala, Rita Drissi Daoudi, Roland Logé, Hossein Ghasemi Tabasi, Toni Ivas

Selective Laser Melting (SLM) or Laser Powder Bed Fusion (L-PBF) is the most studied laser-based additive manufacturing process for metals and alloys. One important issue in SLM is the time-consuming identification of a process window leading to quasi full ...

2020

The role of nanocrystalline binder metallic coating into WC after additive manufacturing

Eric Boillat, Jamasp Jhabvala

Tungsten carbide with microsized particle powders are commonly used embedded in a tough binder metal. The application of these composites is not limited to cutting tools, WC based material has been increasingly used in gaskets and other mechanical parts wi ...

Elsevier2018

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

Eric Boillat, Roland Logé, 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

Method and Device for Implementing Laser Shock Peening or Warm Laser Shock Peening During Selective Laser Melting

Eric Boillat, Roland Logé, Nikola Kalentics

A method for manufacturing an object including the steps of forming layers by adding successive layers of material to form the object by selective laser melting (SLM), and inducing plastic deformation and residual stress into solidified material of at leas ...

2017

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

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

An innovative method to build support structures with a pulsed laser in the selective laser melting process

Eric Boillat, Rémy Glardon, Jamasp Jhabvala, Cédric André

In selective laser melting machines, continuous laser are usually used to melt the powder. The support structures, which are inevitable when dealing with elaborated pieces, necessitate a complex design by CAD in order to be easily removed. This paper propo ...

Springer-Verlag2012

Finite element and neural network models for process optimization in selective laser sintering

Eric Boillat, Rémy Glardon, Serguei Kolossov

2005

Modélisation et analyse numérique de couches limites réactives

Eric Boillat

EPFL1992