Robert Pederson

Published

Fatigue behavior of low-temperature hot isostatic pressed electron beam powder bed fusion manufactured Ti-6Al-4 V

Ti-6Al-4 V finds application in the fan and compressor modules of gas turbine engines due to its high specific strength. Ti-6Al-4 V components...

DiVA

Published

Scanning electron microscopy and atom probe tomography characterization of laser powder bed fusion precipitation strengthening nickel-based superalloy

Atom probe tomography (APT) was utilized to supplement scanning electron microscopy (SEM) characterizationof a precipitation strengthening...

DiVA

Published

Tensile properties of laser powder bed fusion built JBK-75 austenitic stainless steel

Laser powder bed fusion (PBF-LB) is an additive manufacturing (AM) process that has several advantages to conventional manufacturing, such as near...

DiVA

Published

Elevated-Temperature Tensile Properties of Low-Temperature HIP-Treated EBM-Built Ti-6Al-4V.

Evaluation of the high-temperature tensile properties of Ti-6Al-4V manufactured by electron beam melting (EBM) and subjected to a low-temperature h...

DiVA

Published

Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC

Microstructures of material conditions of nickel-based superalloy Alloy 247LC fabricated using laser powder bed fusion (L-PBF) were investigated....

DiVA

Published

Influence of laser powder bed fusion process parameters on the microstructure of solution heat-treated nickel-based superalloy Alloy 247LC

In this study, Alloy 247LC samples were built with different laser powder bed fusion (L-PBF) process parameters. The samples were then subjected to...

DiVA

Published

Influence of laser powder bed fusion scanning pattern on residual stress and microstructure of alloy 718

A comprehensive investigation is undertaken on the effect of laser scanning pattern on the microstructure of cylindrical samples made of Alloy 718...

DiVA

Published

Tensile Properties of 21-6-9 Austenitic Stainless Steel Built Using Laser Powder-Bed Fusion

Alloy 21-6-9 is an austenitic stainless steel with high strength, thermal stability at high temperatures, and retained toughness at cryogenic...

DiVA

Published

Anisotropic fatigue properties of Alloy 718 manufactured by Electron Beam Powder Bed Fusion

In this study, Alloy 718 specimens manufactured by Electron Beam Powder Bed Fusion process are subjected to two different post-treatments to have...

DiVA

Published

Effect of silicon on creep properties of titanium 6Al-2Sn-4Zr-2Mo alloy

The alloy Ti-6Al-2Sn-4Zr-2Mo is a titanium alloy for elevated temperatures often used in aerospace applications. Minor additions of silicon have...

DiVA

Published

Fatigue crack growth of electron beam melted TI-6AL-4V in high-pressure hydrogen

Titanium-based alloys are susceptible to hydrogen embrittlement (HE), a phenomenon that deteriorates fatigue properties. Ti-6Al-4V is the most wide...

DiVA

Published

Influence of laser powder bed fusion process parameters on voids, cracks, and microhardness of nickel-based superalloy alloy 247LC

The manufacturing of parts from nickel-based superalloy Alloy 247LC by laser powder bed fusion (L-PBF) is challenging, primarily owing to the alloy...

DiVA

Published

Machinability of cast titanium alloy Ti-6Al-4V with addition of boron

Cast titanium products generally have coarser microstructures compared to wrought, which explains their limited mechanical properties. However,...

DiVA

Published

On the microstructure of laser beam powder bed fusion alloy 718 and its influence on the low cycle fatigue behaviour

Additive manufacturing of Alloy 718 has become a popular subject of research in recent years. Understanding the process-microstructure-property...

DiVA

$Residual stress determination by neutron diffraction in powder bed fusion-built Alloy 718 : Influence of process parameters and post-treatment$

Published

Residual stress determination by neutron diffraction in powder bed fusion-built Alloy 718 : Influence of process parameters and post-treatment

Alloy 718 is a nickel-based superalloy that is widely used as a structural material for high-temperature applications. One concern that arises when...

DiVA

Published

Review of laser powder bed fusion of gamma-prime-strengthened nickel-based superalloys

This paper reviews state of the art laser powder bed fusion (L-PBF) manufacturing of γ′ nickel-based superalloys. L-PBF resembles welding; therefor...

DiVA

$The Effect of γ″ and δ Phase Precipitation on the Mechanical Properties of Inconel 718 Manufactured by Selective Laser Melting : An In Situ Neutron Diffraction and Acoustic Emission Study$

Published

The Effect of γ″ and δ Phase Precipitation on the Mechanical Properties of Inconel 718 Manufactured by Selective Laser Melting : An In Situ Neutron Diffraction and Acoustic Emission Study

The deformation behavior of additively manufactured Alloy 718 in as-built condition and after annealing was studied in situ under tensile loading...

DiVA

Published

Wire-Based Additive Manufacturing of Ti-6Al-4V Using Electron Beam Technique

Electron beam freeform fabrication is a wire feed direct energy deposition additive manufacturing process, where the vacuum condition ensures...

DiVA

Published

Finite element modeling and validation of springback and stress relaxation in the thermo-mechanical forming of thin Ti-6Al-4V sheets

In this work, a hot forming procedure is developed using computer-aided engineering (CAE) to produce thin Ti-6Al-4V sheet components in an effectiv...

DiVA

Published

Laser beam powder bed fusion and post processing of alloy 247LC

Alloy 247LC is sensitive to cracking during laser beam powder bed fusion (PBF-LB) manufacturing. Post processing is thus required to close cracks a...

DiVA

Published

Microstructural influence on fatigue crack propagation during high cycle fatigue testing of additively manufactured Alloy 718

A study of the microstructure of additively manufactured Alloy 718 was performed in order to better understand the parameters that have an influenc...

DiVA

Published

Microstructure tailoring in Electron Beam Powder Bed Fusion Additive Manufacturing and its potential consequences

Electron Beam Powder Bed Fusion process for Alloy 718 was investigated, in the sense of microstructural evolution with varying process conditions....

DiVA

Published

Residual Lattice Strain and Phase Distribution in Ti-6Al-4V Produced by Electron Beam Melting

Residual stress/strain and microstructure used in additively manufactured material are strongly dependent on process parameter combination. With th...

DiVA

Published

Temperature and microstructure evolution in Gas Tungsten Arc Welding wire feed additive manufacturing of Ti-6Al-4V

The Finite Element Method (FEM) is used to solve temperature field and microstructure evolution during GTAW wire feed additive manufacturing...

DiVA

Published

Additive Manufacturing of Alloy 718 via Electron Beam Melting : Effect of Post-Treatment on the Microstructure and the Mechanical Properties.

Alloy 718 finds application in gas turbine engine components, such as turbine disks, compressor blades and so forth, due to its excellent mechanica...

DiVA

$Alpha texture variations in additive manufactured Ti-6Al-4V investigated with neutron diffraction$

Published

Alpha texture variations in additive manufactured Ti-6Al-4V investigated with neutron diffraction

Variation of texture in Ti-6Al-4V samples produced by three different additive manufacturing (AM) processes has been studied by neutron...

DiVA

$Electron backscatter diffraction characterization of fatigue crack growth in laser metal wire deposited Ti-6Al-4V$

Published

Electron backscatter diffraction characterization of fatigue crack growth in laser metal wire deposited Ti-6Al-4V

By additive manufacturing (AM) there is a feasibility of producing near net shape components in basically one step from 3D CAD model to final...

DiVA

Published

Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al-2Sn-4Zr-2Mo alloy

Ti-6Al-2Sn-4Zr-2Mo is one of the most common titanium alloys for aerospace industry. This alloy experiences oxidation phenomenon at elevated...

DiVA

Published

Influence of defects and as-built surface roughness on fatigue properties of additively manufactured Alloy 718

Electron beam melting (EBM) and Selective Laser Melting (SLM) are powder bed based additive manufacturing (AM) processes. These, relatively new,...

DiVA

Published

Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes

In this work, the microstructures of Ti-6Al-4V manufactured by different additive manufacturing (AM) processes have been characterized and compared...

DiVA

Published

Microstructure and Porosity of Laser Welds in Cast Ti-6Al-4V with Addition of Boron

Addition of small amounts of boron to cast Ti-6Al-4V alloy has shown to render a finer microstructure and improved mechanical properties. For such ...

DiVA

Published

Chemical Milling of Cast Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo Alloys in Hydrofluoric-Nitric Acid Solutions

The behavior of cast Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo during chemical milling in hydrofluoric-nitric (HF-HNO3) acid solutions with 1:3 and 1:11 mol...

DiVA

Published

Microstructure and Defects in Additive Manufactured Titanium : a Comparison Between Microtomography and Optical Microscopy

The aim of this work has been to compare two different analysing methods; x-ray microtomography and light optical microscopy, when it comes to...

DiVA

Published

Microstructure characterisation of Ti-6Al-4V from different additive manufacturing processes

The focus of this work has been microstructure characterisation of Ti-6Al-4V manufactured by five different additive manufacturing (AM) processes....

DiVA

Published

Oxidation behavior of TI-6Al-4V alloy exposed to isothermal and cyclic thermal treatments

One of the most common titanium alloys for aerospace industry is Ti-6Al-4V (usually designed as Ti-64) which is used for manufacturing aero-engine...

DiVA

Published

Simulation of additive manufacturing using coupled constitutive and microstructure models

The paper describes the application of modeling approaches used in Computational Welding Mechanics (CWM) applicable for simulating Additive...

DiVA

Published

The hierarchy of microstructure parameters affecting the tensile ductility in centrifugally cast and forged Ti-834 alloy during high temperature exposure in air

Ductility regression is the main concern in using Ti-834 titanium alloy at temperatures above 500 °C for aerospace applications. The reduction of...

DiVA

Robert Pederson

Head of Division

Fatigue behavior of low-temperature hot isostatic pressed electron beam powder bed fusion manufactured Ti-6Al-4 V

Scanning electron microscopy and atom probe tomography characterization of laser powder bed fusion precipitation strengthening nickel-based superalloy

Tensile properties of laser powder bed fusion built JBK-75 austenitic stainless steel

Elevated-Temperature Tensile Properties of Low-Temperature HIP-Treated EBM-Built Ti-6Al-4V.

Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC

Influence of laser powder bed fusion process parameters on the microstructure of solution heat-treated nickel-based superalloy Alloy 247LC

Influence of laser powder bed fusion scanning pattern on residual stress and microstructure of alloy 718

Tensile Properties of 21-6-9 Austenitic Stainless Steel Built Using Laser Powder-Bed Fusion

Anisotropic fatigue properties of Alloy 718 manufactured by Electron Beam Powder Bed Fusion

Effect of silicon on creep properties of titanium 6Al-2Sn-4Zr-2Mo alloy

Fatigue crack growth of electron beam melted TI-6AL-4V in high-pressure hydrogen

Influence of laser powder bed fusion process parameters on voids, cracks, and microhardness of nickel-based superalloy alloy 247LC

Machinability of cast titanium alloy Ti-6Al-4V with addition of boron

On the microstructure of laser beam powder bed fusion alloy 718 and its influence on the low cycle fatigue behaviour

Residual stress determination by neutron diffraction in powder bed fusion-built Alloy 718 : Influence of process parameters and post-treatment

Review of laser powder bed fusion of gamma-prime-strengthened nickel-based superalloys

The Effect of γ″ and δ Phase Precipitation on the Mechanical Properties of Inconel 718 Manufactured by Selective Laser Melting : An In Situ Neutron Diffraction and Acoustic Emission Study

Wire-Based Additive Manufacturing of Ti-6Al-4V Using Electron Beam Technique

Finite element modeling and validation of springback and stress relaxation in the thermo-mechanical forming of thin Ti-6Al-4V sheets

Laser beam powder bed fusion and post processing of alloy 247LC

Microstructural influence on fatigue crack propagation during high cycle fatigue testing of additively manufactured Alloy 718

Microstructure tailoring in Electron Beam Powder Bed Fusion Additive Manufacturing and its potential consequences

Residual Lattice Strain and Phase Distribution in Ti-6Al-4V Produced by Electron Beam Melting

Temperature and microstructure evolution in Gas Tungsten Arc Welding wire feed additive manufacturing of Ti-6Al-4V

Additive Manufacturing of Alloy 718 via Electron Beam Melting : Effect of Post-Treatment on the Microstructure and the Mechanical Properties.

Alpha texture variations in additive manufactured Ti-6Al-4V investigated with neutron diffraction

Electron backscatter diffraction characterization of fatigue crack growth in laser metal wire deposited Ti-6Al-4V

Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al-2Sn-4Zr-2Mo alloy

Influence of defects and as-built surface roughness on fatigue properties of additively manufactured Alloy 718

Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes

Microstructure and Porosity of Laser Welds in Cast Ti-6Al-4V with Addition of Boron

Chemical Milling of Cast Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo Alloys in Hydrofluoric-Nitric Acid Solutions

Microstructure and Defects in Additive Manufactured Titanium : a Comparison Between Microtomography and Optical Microscopy

Microstructure characterisation of Ti-6Al-4V from different additive manufacturing processes

Oxidation behavior of TI-6Al-4V alloy exposed to isothermal and cyclic thermal treatments

Simulation of additive manufacturing using coupled constitutive and microstructure models

The hierarchy of microstructure parameters affecting the tensile ductility in centrifugally cast and forged Ti-834 alloy during high temperature exposure in air

Research projects