Mirko Schaper
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View article: In Situ Alloying of Ti-6Al-7Nb with Copper Using Laser Powder Bed Fusion
In Situ Alloying of Ti-6Al-7Nb with Copper Using Laser Powder Bed Fusion Open
Titanium alloys are widely employed for biomedical implants due to their high strength, biocompatibility, and corrosion resistance, yet their lack of intrinsic antibacterial activity remains a major limitation. Incorporating copper, an ant…
View article: Large‐Scale Interlaboratory Study Along the Entire Process Chain of Laser Powder Bed Fusion: Bridging Variability, Standards, and Optimization across Metals and Polymers
Large‐Scale Interlaboratory Study Along the Entire Process Chain of Laser Powder Bed Fusion: Bridging Variability, Standards, and Optimization across Metals and Polymers Open
Laser powder bed fusion is a cornerstone technology for additive manufacturing (AM) of metals and polymers, yet challenges in achieving consistent reproducibility and process optimization persist. Addressing these requires a systematic und…
View article: Direct Natural and Artificial Aging of Aluminum Alloy AlSi10Mg After Laser Powder‐Bed Fusion
Direct Natural and Artificial Aging of Aluminum Alloy AlSi10Mg After Laser Powder‐Bed Fusion Open
The present study gives insight into the direct aging of an aluminum alloy AlSi10Mg additively manufactured by laser powder‐bed fusion. Pure AlSi10Mg powders, as well as powders inoculated with TiC and SiC nanoparticles before laser powder…
View article: On the Formation of Carbonaceous By-Product Species in Spray Flame Synthesis of Maghemite Nanoparticles
On the Formation of Carbonaceous By-Product Species in Spray Flame Synthesis of Maghemite Nanoparticles Open
This study investigates the formation of by-product species during flame spray synthesis (SFS) of superparamagnetic maghemite (γ-Fe2O3) nanoparticles. Four samples are synthesized by utilizing two standardized burner types (SpraySyn1 and S…
View article: Doubt and Transformation in Education
Doubt and Transformation in Education Open
Fostering transformative experiences is a central goal of education. In this article, Marieke Schaper examines the relationship between doubt and transformation in education, specifically problematizing the idea that doubt can serve as a c…
View article: Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys
Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys Open
Lightweight design is a driving concept in modern automotive engineering to minimize resource consumption over a vehicle's lifecycle through multi-material design, which relies on the use of joining techniques in car body fabrication. Mult…
View article: Process chain of a twin-roll cast aluminium-copper-lithium alloy
Process chain of a twin-roll cast aluminium-copper-lithium alloy Open
Rolling processes of conventional cast Al-Li alloys quickly reach their limits due to relatively poor material formability. This can be overcome by using twin-roll casting to produce thin sheets. Further thermomechanical treatment, includi…
View article: Effect of Sc addition on downstream processing of twin-roll cast Al−Cu−Li−Mg−Zr-based alloys
Effect of Sc addition on downstream processing of twin-roll cast Al−Cu−Li−Mg−Zr-based alloys Open
A processing scheme for preparing strips of Al−Cu−Li−Mg−Zr-based alloys microalloyed with Sc was proposed. This scheme includes a twin-roll casting of strips with a near-net-shaped 3 mm-thick gauge and a homogenization/solution treatment p…
View article: Near Net Shape Manufacturing of Sheets from Al-Cu-Li-Mg-Sc-Zr Alloy
Near Net Shape Manufacturing of Sheets from Al-Cu-Li-Mg-Sc-Zr Alloy Open
Thin twin-roll cast strips from a model Al-Cu-Mg-Li-Zr alloy with a small addition of Sc were prepared. A combination of a fast solidification rate and a favorable effect of Sc microalloying refines the grain size and the size of primary p…
View article: Near Net Shape Manufacturing of Sheets from Al-Li-Based Alloy
Near Net Shape Manufacturing of Sheets from Al-Li-Based Alloy Open
Thin twin-roll cast strips from a model Al-Cu-Mg-Li-Zr alloy with a small addition of Sc were prepared. A combination of a fast solidification rate and a favorable effect of Sc microalloying impacts the size and distribution of primary pha…
View article: Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion
Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion Open
Through tailoring the geometry and design of biomaterials, additive manufacturing is revolutionizing the production of metallic patient-specific implants, e.g., the Ti-6Al-7Nb alloy. Unfortunately, studies investigating this alloy showed t…
View article: High-temperature transformations in Al-Li-based alloy studied by ACOM-TEM during in-situ heating
High-temperature transformations in Al-Li-based alloy studied by ACOM-TEM during in-situ heating Open
Al-Li-based alloy of a third-generation containing 3.71% Cu, 0.91% Li, 0.31% Mg, 0.15% Zr, and 0.05% Fe was prepared by twin-roll and mold casting. Thin specimens were in-situ annealed in TEM up to 450 °C, and the transformation of boundar…
View article: Comment on ar-2023-14
Comment on ar-2023-14 Open
Abstract. Particles generated by spray flame synthesis (SFS) can exhibit impurities, with surface adsorbates and soot being the best-known examples. Unfortunately, the extent to which the formation of these impurities can be characterized,…
View article: Comment on ar-2023-14
Comment on ar-2023-14 Open
Abstract. Particles generated by spray flame synthesis (SFS) can exhibit impurities, with surface adsorbates and soot being the best-known examples. Unfortunately, the extent to which the formation of these impurities can be characterized,…
View article: Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach
Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach Open
The effect of plaque deposition (atherosclerosis) on blood flow behaviour is investigated via computational fluid dynamics and structural mechanics simulations. To mitigate the narrowing of coronary artery atherosclerosis (stenosis), the c…
View article: On Formation of Carbonaceous Impurities in Flame Spray Synthesis of Maghemite Nanoparticles
On Formation of Carbonaceous Impurities in Flame Spray Synthesis of Maghemite Nanoparticles Open
Particles generated by spray flame synthesis (SFS) can exhibit impurities, with surface adsorbates and soot being the best-known examples. Unfortunately, the extent to which the formation of these impurities can be characterized, and how t…
View article: Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates
Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates Open
Consistent lightweight construction in the area of vehicle manufacturing requires the increased use of multi-material combinations. This, in turn, requires an adaptation of standard joining techniques. In multi-material combinations, the i…
View article: Potentials of a friction-induced recycling process to improve resource and energy efficiency in manufacturing technology
Potentials of a friction-induced recycling process to improve resource and energy efficiency in manufacturing technology Open
Efforts to enhance sustainability in all areas of life are increasing worldwide. In the field of manufacturing technology, a wide variety of approaches are being used to improve both resource and energy efficiency. Efficiency as well as su…
View article: Quasi-In Situ Localized Corrosion of an Additively Manufactured FeCo Alloy in 5 Wt Pct NaCl Solution
Quasi-In Situ Localized Corrosion of an Additively Manufactured FeCo Alloy in 5 Wt Pct NaCl Solution Open
FeCo alloys are important materials used in pumps and motors in the offshore oil and gas drilling industry. These alloys are subjected to marine environments with a high NaCl concentration, therefore, corrosion and catastrophic failure are…
View article: Mechanical and Microstructure Characterisation of the Hypoeutectic Cast Aluminium Alloy AlSi10Mg Manufactured by the Twin-Roll Casting Process
Mechanical and Microstructure Characterisation of the Hypoeutectic Cast Aluminium Alloy AlSi10Mg Manufactured by the Twin-Roll Casting Process Open
Multi-material designs (MMD) are more frequently used in the automotive industry. Hereby, the combination of different materials, metal sheets, or cast components, is mechanically joined, often by forming joining processes. The cast compon…
View article: An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures
An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures Open
Herein, the design, manufacturing, and mechanical testing of hollow‐strut lattice structures of the metastable β ‐titanium alloy Ti–24Nb–4Zr–8Sn (Ti2448) are performed. Due to the absence of studies in the literature, this study focusses o…
View article: Powder Production via Atomisation and Subsequent Laser Powder Bed Fusion Processing of Fe+316L Steel Hybrid Alloy
Powder Production via Atomisation and Subsequent Laser Powder Bed Fusion Processing of Fe+316L Steel Hybrid Alloy Open
The current investigation shows the feasibility of 316L steel powder production via three different argon gas atomisation routes (closed coupled atomisation, free fall atomisation with and without hot gas), along with subsequent sample pro…
View article: Correlation between Differential Fast Scanning Calorimetry and Additive Manufacturing Results of Aluminium Alloys
Correlation between Differential Fast Scanning Calorimetry and Additive Manufacturing Results of Aluminium Alloys Open
High-strength aluminium alloy powders modified with different nanoparticles by ball milling (7075/TiC, 2024/CaB6, 6061/YSZ) have been investigated in-situ during rapid solidification by differential fast scanning calorimetry (DFSC). Solidi…
View article: FeMn with Phases of a Degradable Ag Alloy for Residue-Free and Adapted Bioresorbability
FeMn with Phases of a Degradable Ag Alloy for Residue-Free and Adapted Bioresorbability Open
The development of bioresorbable materials for temporary implantation enables progress in medical technology. Iron (Fe)-based degradable materials are biocompatible and exhibit good mechanical properties, but their degradation rate is low.…
View article: Modification of Iron with Degradable Silver Phases Processed via Laser Beam Melting for Implants with Adapted Degradation Rate
Modification of Iron with Degradable Silver Phases Processed via Laser Beam Melting for Implants with Adapted Degradation Rate Open
In medical technology, implants are used to improve the quality of patients’ lives. The development of materials with adapted properties can further increase the benefit of implants. If implants are only needed temporarily, biodegradable m…