Peter Staron
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View article: Time-resolved imaging of electron beam powder bed fusion using an X-ray microscope optimized for white beam radiation
Time-resolved imaging of electron beam powder bed fusion using an X-ray microscope optimized for white beam radiation Open
A high-speed synchrotron radiography system has been developed to facilitate in situ imaging of dynamic processes in electron beam powder bed fusion (PBF-EB). Using the P61A White Beam Engineering Materials Science beamline at PETRA III, t…
View article: <i>Pydidas</i>: a tool for automated X-ray diffraction data analysis
<i>Pydidas</i>: a tool for automated X-ray diffraction data analysis Open
The processing and analysis of X-ray diffraction (XRD) data at synchrotrons is often left to the user groups, which limits the user base to groups with a background in analyzing XRD data. Pydidas is a new Python package for processing XRD …
View article: The ESAFORM benchmark 2023: interlaboratory comparison benchmark for the characterization of microstructural grain growth and dynamic recrystallization kinetics of a single-phase Ni-base superalloy
The ESAFORM benchmark 2023: interlaboratory comparison benchmark for the characterization of microstructural grain growth and dynamic recrystallization kinetics of a single-phase Ni-base superalloy Open
This paper presents an extensive benchmark study conducted across eight European research centres, focusing on the high-temperature testing of the Alloy 625 nickel-based superalloy to evaluate its flow behaviour and microstructural evoluti…
View article: Determination of Residual Stress in Additively Manufactured 316L Stainless Steel Benchmark Parts Through Synchrotron X‐Ray Diffraction and Neutron Diffraction
Determination of Residual Stress in Additively Manufactured 316L Stainless Steel Benchmark Parts Through Synchrotron X‐Ray Diffraction and Neutron Diffraction Open
Additive manufacturing (AM) of parts is typically associated with the generation of high residual stresses because of repeated exposure to high thermal gradients. Non‐destructive means of mapping the residual stresses are required for opti…
View article: Impact of friction stir welding-like heat cycles on precipitates in AA7050 analysed by SAXS and numerical modelling
Impact of friction stir welding-like heat cycles on precipitates in AA7050 analysed by SAXS and numerical modelling Open
Precipitation kinetics in AA7050 during heat cycles as they occur in friction stir welding (FSW) were studied via small-angle X-ray scattering (SAXS), X-ray diffraction (XRD) and numerical modelling using the PanPrecipitation software. Rev…
View article: Advancements in metal additive manufacturing: In-situ heat treatment of aluminium alloys during the laser powder bed fusion process
Advancements in metal additive manufacturing: In-situ heat treatment of aluminium alloys during the laser powder bed fusion process Open
The high design freedom of laser powder bed fusion (LPBF) additive manufacturing enables new integrated structures, which in turn demand advances in the process conditions and material design to exploit the full potential of this process. …
View article: MiniMelt: An instrument for real-time tracking of electron beam additive manufacturing using synchrotron x-ray techniques
MiniMelt: An instrument for real-time tracking of electron beam additive manufacturing using synchrotron x-ray techniques Open
The development of a sample environment for in situ x-ray characterization during metal Electron Beam Powder Bed Fusion (PBF-EB), called MiniMelt, is presented. The design considerations, the features of the equipment, and its implementati…
View article: Evolution of nano-pores during annealing of technically pure molybdenum sheet produced from different sintered formats
Evolution of nano-pores during annealing of technically pure molybdenum sheet produced from different sintered formats Open
Molybdenum is a refractory metal with no phase transformation in the solid state and a high melting point. It is therefore an excellent structural material for various high temperature applications. Especially in this field of operation, s…
View article: Precipitation Evolution in the Heat‐Affected Zone and Coating Material of AA2024 Processed by Friction Surfacing
Precipitation Evolution in the Heat‐Affected Zone and Coating Material of AA2024 Processed by Friction Surfacing Open
Herein, self‐mating coating depositions are generated from Al–Cu–Mg alloy AA2024 by using the solid‐state joining method, friction surfacing (FS). The precipitation evolution in the heat‐affected zone (HAZ) of the substrate material and in…
View article: Revealing dynamic processes in laser powder bed fusion with <i>in situ</i> X-ray diffraction at PETRA III
Revealing dynamic processes in laser powder bed fusion with <i>in situ</i> X-ray diffraction at PETRA III Open
The high flux combined with the high energy of the monochromatic synchrotron radiation available at modern synchrotron facilities offers vast possibilities for fundamental research on metal processing technologies. Especially in the case o…
View article: In-situ synchrotron X-ray analysis of metal Additive Manufacturing: Current state, opportunities and challenges
In-situ synchrotron X-ray analysis of metal Additive Manufacturing: Current state, opportunities and challenges Open
Additive Manufacturing (AM) is becoming an important technology for manufacturing of metallic materials. Laser-Powder Bed Fusion (L-PBF), Electron beam-Powder Bed Fusion (E-PBF) and Directed Energy Deposition (DED) have attracted significa…
View article: Quench rate sensitivity of age-hardenable Al-Zn-Mg-Cu alloys with respect to the Zn/Mg ratio: An in situ SAXS and HEXRD study
Quench rate sensitivity of age-hardenable Al-Zn-Mg-Cu alloys with respect to the Zn/Mg ratio: An in situ SAXS and HEXRD study Open
Al-Zn-Mg-Cu alloys with a low Zn/Mg ratio have attracted considerable attention in recent years as a result of an attractive property portfolio based on their ability of age hardening via the precipitation of the T-Mg32(Al,Zn)49 phase and …
View article: Phase transformations and phase stability in the Ti–44 at.%Al–(0–7 at.%)Mo system
Phase transformations and phase stability in the Ti–44 at.%Al–(0–7 at.%)Mo system Open
Molybdenum is an excellent candidate to study the effect of β-stabilizing elements on the phase transitions in intermetallic γ-TiAl based alloys. In the present work, two model alloys based on the Ti–44Al (at.%) system containing 1 at.% an…
View article: On the prediction of fatigue crack growth based on weight functions in residual stress fields induced by laser shock peening and laser heating
On the prediction of fatigue crack growth based on weight functions in residual stress fields induced by laser shock peening and laser heating Open
This study deals with fatigue crack growth prediction for thin sheet AA2024 specimens with residual stresses introduced through laser shock peening and laser heating treatments. Different weight functions are used to calculate the stress i…
View article: Modeling precipitation kinetics for multi-phase and multi-component systems using particle size distributions via a moving grid technique
Modeling precipitation kinetics for multi-phase and multi-component systems using particle size distributions via a moving grid technique Open
The collection and coupling of thermodynamic data following the Calphad framework is important for the computational alloy and process design. The microstructure and the precipitation kinetics have a significant influence on the microstruc…
View article: In Situ Observation of γ′ Phase Transformation Dynamics During Selective Laser Melting of CMSX‐4
In Situ Observation of γ′ Phase Transformation Dynamics During Selective Laser Melting of CMSX‐4 Open
Additive manufacturing (AM) of superalloys has been attracting increasing interest. While most studies focus on the processability and mechanical properties of the finished product, it is also necessary to understand the phase transformati…
View article: Thermal Expansion of a Multiphase Intermetallic Ti-Al-Nb-Mo Alloy Studied by High-Energy X-ray Diffraction
Thermal Expansion of a Multiphase Intermetallic Ti-Al-Nb-Mo Alloy Studied by High-Energy X-ray Diffraction Open
Intermetallic γ-TiAl-based alloys are lightweight materials for high-temperature applications, e.g., in the aerospace and automotive industries. They can replace much heavier Ni-based alloys at operating temperatures up to 750 °C. Advanced…
View article: Effect of laser heating on mechanical properties, residual stresses and retardation of fatigue crack growth in AA2024
Effect of laser heating on mechanical properties, residual stresses and retardation of fatigue crack growth in AA2024 Open
Local laser heating treatment using a defocussed laser beam was applied to the surface of 2‐mm‐thick AA2024‐T3 sheets. Two different treatment designs—namely, lines and circles—as well as the positioning and number of treatments were inves…
View article: Powder diffraction computed tomography: a combined synchrotron and neutron study
Powder diffraction computed tomography: a combined synchrotron and neutron study Open
Diffraction and imaging using x-rays and neutrons are widely utilized in different fields of engineering, biology, chemistry and/or materials science. The additional information gained from the diffraction signal by x-ray diffraction and c…
View article: A zone melting device for the <i>in situ</i> observation of directional solidification using high-energy synchrotron x rays
A zone melting device for the <i>in situ</i> observation of directional solidification using high-energy synchrotron x rays Open
Directional solidification (DS) is an established manufacturing process to produce high-performance components from metallic materials with optimized properties. Materials for demanding high-temperature applications, for instance in the en…
View article: Combined experimental–numerical study on residual stresses induced by a single impact as elementary process of mechanical peening
Combined experimental–numerical study on residual stresses induced by a single impact as elementary process of mechanical peening Open
Peening processes can be used as a fatigue enhancement treatment for metallic structures by locally introducing compressive residual stresses. A combined experimental–numerical study on a single‐impact process with a drop tower on the alum…
View article: Evidence of an orthorhombic transition phase in a Ti-44Al-3Mo (at.%) alloy using in situ synchrotron diffraction and transmission electron microscopy
Evidence of an orthorhombic transition phase in a Ti-44Al-3Mo (at.%) alloy using in situ synchrotron diffraction and transmission electron microscopy Open
Alloying of a binary system with an additional element often leads to the formation of new phases. In this work, a γ-TiAl based alloy with 3 at.% molybdenum was investigated, which was quenched from 1450 °C. Upon reheating, the formation o…
View article: Experimental and numerical investigation of residual stresses in laser shock peened AA2198
Experimental and numerical investigation of residual stresses in laser shock peened AA2198 Open
Laser shock peening (LSP) is a surface treatment which improves the fatigue performance of metallic structures by introducing compressive residual stresses. The aim of this paper is the investigation of LSP of the aluminium alloy AA2198. T…