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Structure and Mechanics of Advanced Materials

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Scientific Highlights

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Datum
24 janvier 2023
Tool Steel

Solidification modes during additive manufacturing

The thermal conditions during laser-based additive manufacturing are inferred from high-speed X-ray diffraction data and can be linked to a model for rapid solidification.

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4 décembre 2022
EBSD image of prior beta grains

Thermal cycling during 3D laser printing

High-speed in situ X-ray diffraction is used to measure temperature profiles and cooling rates during 3D printing of a a Ti-6Al-4V single-track wall.

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23 septembre 2022
Phase fractions in Ti-6Al-4V-3Fe

In situ alloying during additive manufacturing

In situ alloying is an effective method to engineer microstructures of additively manufactured Ti6Al4V3Fe alloys. 

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21 juillet 2022
LPBF Acoustic Emission

Deep learning-based monitoring of laser powder bed fusion processes

We present a novel monitoring strategy for 3D print processes that consists of developing and training a hybrid machine learning model that can classify regimes across different time scales based on heterogeneous sensing data. 

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11 avril 2022
Al3(Sc,Zr)

Thermal and phase evolution during laser powder bed fusion of Al-Sc-Zr elemental powder blends

The reaction of elemental scandium and zirconium powders with liquid aluminum is observed directly via operando X-ray diffraction during laser 3D printing. This work demonstrates that elemental blends can be used to create fine-grained crack-free Al-alloys and highlights the importance of feature size.

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17 janvier 2022
Operando radiography

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

Operando high-speed X-ray radiography experiments reveal the cracking mechanism during 3D laser printing of a Ni superalloy.

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10 janvier 2022
Texture red gold

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

Synchrotron X-ray diffraction experiments reveal the presence of a non- negligible amount of tetragonal phase in 3D printed red-gold samples. 

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9 décembre 2021
Marianne Liebi and Manuel Guizar-Sicairos

Ground-breaking technology development recognised

PSI researchers win the international Innovation Award on Synchrotron Radiation for 3D mapping of nanoscopic details in macroscopic specimens, such as bone.

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Structure and Mechanics of Advanced Materials Group

Paul Scherrer Institut
WBBA/114
5232 Villigen-PSI
Switzerland

Prof. Dr. Marianne Liebi
Group Leader
Telephone: +41 56 310 44 38
E-mail: marianne.liebi@psi.ch

Dr. Steven Van Petegem
Senior scientist
Telephone: +41 56 310 25 37
E-mail: steven.vanpetegem@psi.ch

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