Wolfgang Waldhauser
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View article: Study of mechanical properties of 2024-RAM2C and 6061-RAM2C aluminium alloys made by laser-based powder bed fusion of metals
Study of mechanical properties of 2024-RAM2C and 6061-RAM2C aluminium alloys made by laser-based powder bed fusion of metals Open
Purpose This study aims to present the laser-based powder bed fusion of metals (PBF-LB/m) process development of two alloys, Aluminium 2024-RAM2C and Aluminium 6061-RAM2C, commercialised by Elementum3D, USA, and the results of chemical, me…
View article: The Effect of Plasma-Polymerized Cerium-Doped Hexamethyldisiloxane Film Thickness on Corrosion Protection of L-PBF AlSi10Mg
The Effect of Plasma-Polymerized Cerium-Doped Hexamethyldisiloxane Film Thickness on Corrosion Protection of L-PBF AlSi10Mg Open
Laser powder bed fusion (L-PBF)-manufactured AlSi10Mg components exhibit localized microstructural inhomogeneities and high surface roughness, rendering them susceptible to corrosion. This study investigates the characteristics of cerium-d…
View article: Shrouding Gas Plasma Deposition Technique for Developing Low-Friction, Wear-Resistant WS2-Zn Thin Films on Unfilled PEEK: The Relationship Between Process and Coating Properties
Shrouding Gas Plasma Deposition Technique for Developing Low-Friction, Wear-Resistant WS2-Zn Thin Films on Unfilled PEEK: The Relationship Between Process and Coating Properties Open
In this study, tungsten disulfide–zinc (WS2-Zn) composite films were generated on polyether ether ketone (PEEK) disks by an atmospheric pressure plasma jet (APPJ) equipped with a shrouding attachment. The friction and wear properties of th…
View article: Wear-Resistant Low-friction Atmospheric Pressure Plasma Spray Coatings for Sustainable (Bio-based Recyclable) Materials
Wear-Resistant Low-friction Atmospheric Pressure Plasma Spray Coatings for Sustainable (Bio-based Recyclable) Materials Open
Coatings from polyetheretherketone (PEEK), polyamide 12 (PA12), molybdenumdisulfide (MoS 2 ), zinc (Zn), and graphite (C) powder mixtures were deposited on PA6, PA12, and PEEK substrates by an atmospheric pressure plasma (APP) spray jet sy…
View article: Simulation-based Analysis of the Atmospheric Pressure Plasma and Its Temperature Distribution Using Ansys Mechanical
Simulation-based Analysis of the Atmospheric Pressure Plasma and Its Temperature Distribution Using Ansys Mechanical Open
This research article delves into an in-depth analysis of atmospheric pressure plasma and its temperature distribution, utilizing the finite element method (FEM) and Ansys Mechanical software. This contribution discusses the various techno…
View article: L-PBF of the Metastable β Titanium Alloy Ti-5553: Microstructure and Mechanical Properties
L-PBF of the Metastable β Titanium Alloy Ti-5553: Microstructure and Mechanical Properties Open
Ti-5Al-5V-5Mo-3Cr or Ti-5553 is a metastable β Titanium alloy with excellent mechanical properties. Compared to the most common titanium alloy, the α and β Ti6Al4V, even at high cooling rates as present in the laser powder bed fusion proce…
View article: Ternary low-friction coatings on thermoplastics by plasma spraying: Investigations on the process-structure
Ternary low-friction coatings on thermoplastics by plasma spraying: Investigations on the process-structure Open
Thermally sprayed MoS2/graphite/Zn coatings were developed by the atmospheric pressure plasma jet technique to investigate the process-structure-relationship of the low-friction coatings. The fine-tuning of the powder carrier gas flow to t…
View article: Single- and Multilayer Build-Up of an Antibacterial Temperature- and UV-Curing Sol–Gel System with Atmospheric Pressure Plasma
Single- and Multilayer Build-Up of an Antibacterial Temperature- and UV-Curing Sol–Gel System with Atmospheric Pressure Plasma Open
The versatility of sol–gel systems makes them ideal for functional coatings in industry. However, existing coatings are either too thin or take too long to cure. To address these issues, this paper proposes using an atmospheric pressure pl…
View article: High Temperature Tensile Strength of TI6AL4V Processed by L-PBF—Influence of Microstructure and Heat Treatment
High Temperature Tensile Strength of TI6AL4V Processed by L-PBF—Influence of Microstructure and Heat Treatment Open
Ti6Al4V is the most widely used α‑β Titanium alloy for application in medicine, automotive, and aerospace, known for its high strength and corrosion resistance, but also its high maximal operating temperature of around 420 °C. Combined wit…
View article: Toward a sustainable laser powder bed fusion of Ti 6Al 4 V: Powder reuse and its effects on material properties during a single batch regime
Toward a sustainable laser powder bed fusion of Ti 6Al 4 V: Powder reuse and its effects on material properties during a single batch regime Open
Titanium alloy Ti6Al4V is the most used titanium alloy due to its high specific strength, ductility, corrosion resistance, and weldability. Currently, this alloy is produced with a density above 99% with laser welding-based additive manufa…
View article: Surface Topography and Biocompatibility of cp–Ti Grade2 Fabricated by Laser‐Based Powder Bed Fusion: Influence of Printing Orientation and Surface Treatments
Surface Topography and Biocompatibility of cp–Ti Grade2 Fabricated by Laser‐Based Powder Bed Fusion: Influence of Printing Orientation and Surface Treatments Open
The selective laser melting process, commonly known as laser‐based powder bed fusion (LB‐PBF), enables the production of structures with unprecedented degrees of freedom that represents an excellent condition for development of metallic im…
View article: Influence of powder production process and properties on material properties of Ti6Al4V manufactured by L-PBF
Influence of powder production process and properties on material properties of Ti6Al4V manufactured by L-PBF Open
Besides process parameters, powder properties such as grain size, morphology, and chemical composition have the highest impact on the material properties of parts produced by powder-based additive manufacturing. These properties are strong…
View article: Low-friction, wear-protecting coatings on polymers by atmospheric pressure plasma spraying
Low-friction, wear-protecting coatings on polymers by atmospheric pressure plasma spraying Open
Deposition strategies to obtain low-friction and wear resistant coatings on 3D-printed rough polyamide 12 (PA12, nylon) surfaces were developed via atmospheric pressure plasma deposition. The feedstock materials for the DC plasma torch Ino…
View article: Atomic layer deposition of oxide coatings on porous metal and polymer structures fabricated by additive manufacturing methods (laser-based powder bed fusion, material extrusion, material jetting)
Atomic layer deposition of oxide coatings on porous metal and polymer structures fabricated by additive manufacturing methods (laser-based powder bed fusion, material extrusion, material jetting) Open
Complex porous 316 L stainless steel, Ti-6Al-4V, Ti-6Al-7Nb, ULTEM™ 1010 and MED610™ polymer structures were produced with additive manufacturing methods. The structures were surface functionalized by atomic layer deposition of titanium, z…
View article: Influence of Powder Production Process and Properties on Material Properties of Ti 6Al 4V Manufactured by L-PBF
Influence of Powder Production Process and Properties on Material Properties of Ti 6Al 4V Manufactured by L-PBF Open
Besides process parameters, powder properties such as grain size, morphology and chemical composition have the highest impact on material properties of parts produced by powder based additive manufacturing. These properties are strongly in…
View article: Influences of Surface, Heat Treatment, and Print Orientation on the Anisotropy of the Mechanical Properties and the Impact Strength of Ti 6Al 4V Processed by Laser Powder Bed Fusion
Influences of Surface, Heat Treatment, and Print Orientation on the Anisotropy of the Mechanical Properties and the Impact Strength of Ti 6Al 4V Processed by Laser Powder Bed Fusion Open
The scope of this work is to provide an overview of the influences of process parameters, print orientation, and post-process treatments of Ti6AlV4 processed by laser powder bed fusion on its microstructure and physical and mechanical prop…
View article: Aerosol Jet Printing of Graphene and Carbon Nanotube Patterns on Realistically Rugged Substrates
Aerosol Jet Printing of Graphene and Carbon Nanotube Patterns on Realistically Rugged Substrates Open
Direct-write additive manufacturing of graphene and carbon nanotube (CNT) patterns by aerosol jet printing (AJP) is promising for the creation of thermal and electrical interconnects in (opto)electronics. In realistic application scenarios…
View article: Aerosol Jet Printed Nanocarbons on Heat Sink Materials
Aerosol Jet Printed Nanocarbons on Heat Sink Materials Open
Graphene- and carbon nanotube (CNT)-based inks have been printed on relevant heat sink materials by Aerosol jet. The thickness of the layers varied between ~100 and ~1.500 nm. The inks’ viscosity ranged from <20 up to 600 cps at a solid…
View article: Atomic-Scale <i>in Situ</i> Observations of Crystallization and Restructuring Processes in Two-Dimensional MoS<sub>2</sub> Films
Atomic-Scale <i>in Situ</i> Observations of Crystallization and Restructuring Processes in Two-Dimensional MoS<sub>2</sub> Films Open
We employ atomically resolved and element-specific scanning transmission electron microscopy (STEM) to visualize in situ and at the atomic scale the crystallization and restructuring processes of two-dimensional (2D) molybdenum disulfide (…
View article: The effect of layer architecture on the tribological behaviour of coatings
The effect of layer architecture on the tribological behaviour of coatings Open
PEEK is a medical grade material which is increasingly used instead of titanium in osteosynthesis and joint replacement. However, its surface properties of PEEKlack on an adequate osteoconductivity. In this study, two coatings with differe…
View article: Influence of defects on axial fatigue strength of maraging steel specimens produced by additive manufacturing
Influence of defects on axial fatigue strength of maraging steel specimens produced by additive manufacturing Open
Nowadays many materials such as steels, aluminium and titanium alloys can be realised by powder bed solutions melting subsequently powder layers by means of a laser or electron beam (Laser Beam Melting – LBM and Electron Beam Melting – EBM…
View article: Growth, structure and stability of sputter-deposited MoS<sub>2</sub> thin films
Growth, structure and stability of sputter-deposited MoS<sub>2</sub> thin films Open
Molybdenum disulphide (MoS 2 ) thin films have received increasing interest as device-active layers in low-dimensional electronics and also as novel catalysts in electrochemical processes such as the hydrogen evolution reaction (HER) in el…
View article: Influence of build orientation on static and axial fatigue properties of maraging steel specimens produced by additive manufacturing
Influence of build orientation on static and axial fatigue properties of maraging steel specimens produced by additive manufacturing Open
Additive manufacturing involves a layer-by-layer build-up of mechanical parts and it is a manufacturing technology that can be adopted with different engineering metal materials like steels, aluminium and titanium alloys. Aim of the presen…
View article: Roughness Influence On Macro- And Micro-Tribology Of Multi-Layered Hard Coatings On Carbon Fibre Polymer Composite
Roughness Influence On Macro- And Micro-Tribology Of Multi-Layered Hard Coatings On Carbon Fibre Polymer Composite Open
Goal of this work is the investigation of roughness influences on the abrasive wear behaviour of magnetron sputtered multi-layered, low-friction coatings on carbon-fibre reinforced polymers (CFRP). Higher coating roughness at similar CFRP …
View article: Dry And Ringer Solution Lubricated Tribology Of Thin Osseoconductive Metal Oxides And Diamond-Like Carbon Films
Dry And Ringer Solution Lubricated Tribology Of Thin Osseoconductive Metal Oxides And Diamond-Like Carbon Films Open
Achieving fast and strong adhesion to jawbone is essential for dental implants. Thin deposited films may improve osseointegration, but they are prone to cohesive and adhesive fracture due to high stresses while screwing the implant into th…
View article: Study of Gas Permeation Through Thin ta-C:H Films
Study of Gas Permeation Through Thin ta-C:H Films Open
Protective ultra-thin barrier lms gather increasing economic interest for controlling permeation and diusion from the biological surrounding in implanted sensor and electronic devices in future medicine.Thus, the aim of this work was the i…
View article: The Correlation Between Elastic Properties and AFM Images of Nanocoatings on Polymers
The Correlation Between Elastic Properties and AFM Images of Nanocoatings on Polymers Open
In a biomimetic approach for designing implants, both the physical properties (such as topography, elasticity, roughness, hydrophilicity, charges etc.) and the chemical structure of the articial biomaterial should be considered, since they…