Daniel Meyer
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View article: Laser powder bed fusion of Ti–6Al–4V: In-situ rolling for microstructure modification and grain refinement
Laser powder bed fusion of Ti–6Al–4V: In-situ rolling for microstructure modification and grain refinement Open
Laser additive manufacturing is known for high geometrical freedom, high cooling rates and fine microstructures with high performance properties. Regarding Ti–6Al–4V, often a strong microstructural texture results with mostly undesired ani…
View article: Utilisation Potential of Mechanical Material Loads during Grinding by Means of a Novel Tool Concept
Utilisation Potential of Mechanical Material Loads during Grinding by Means of a Novel Tool Concept Open
The objective of this work is to improve the surface and subsurface properties of steel parts by means of a new grinding tool concept featuring nearly spherical grains in an elastic bonding system and to uncover the underlying mechanisms l…
View article: Optical measurement approach to analyse the tool-workpiece interacting flow of grinding processes
Optical measurement approach to analyse the tool-workpiece interacting flow of grinding processes Open
Investigations of the coolant flow within a running grinding machine are carried out to examine the flow behaviour of the coolant in interaction with the grinding wheel and the workpiece. The aim of the investigations is to understand the …
View article: Dry-Adhesive Microstructures for Material Handling of Additively Manufactured and Deep-Rolled Metal Surfaces with Reference to Mars
Dry-Adhesive Microstructures for Material Handling of Additively Manufactured and Deep-Rolled Metal Surfaces with Reference to Mars Open
Once on Mars, maintenance and repair will be crucial for humans as supply chains including Earth and Mars will be very complex. Consequently, the raw material available on Mars must be processed and used. Factors such as the energy availab…
View article: Dry Adhesive Microstructures for Material Handling of Additively Manufactured and Deep Rolled Metal Surfaces with Reference to Mars
Dry Adhesive Microstructures for Material Handling of Additively Manufactured and Deep Rolled Metal Surfaces with Reference to Mars Open
Once on Mars, maintenance and repair will be crucial for humans as supply chains including Earth andMars will be very complex. Consequently, the raw material available on mars must be processed and used. Factors such as the energy availabl…
View article: Characterization of the Interaction of Metalworking Fluids with Grinding Wheels
Characterization of the Interaction of Metalworking Fluids with Grinding Wheels Open
The thermal load that occurs during grinding can be reduced with the aid of an optimized metalworking fluid (MWF) supply. In previous work, mainly the free jet was considered for the determination of the conditions required for an optimize…
View article: Process Signatures–Knowledge-based approach towards function-oriented manufacturing
Process Signatures–Knowledge-based approach towards function-oriented manufacturing Open
Surface layer properties are of crucial importance for the functional performance of manufactured components. For the vision of a function-oriented production, the relevant surface layer properties for the considered functional properties …
View article: Simulation of internal material loads caused by simultaneous contacts in grinding with predominantly mechanical impact
Simulation of internal material loads caused by simultaneous contacts in grinding with predominantly mechanical impact Open
In grinding with predominantly mechanical impact, each abrasive grain contributes to the resulting surface integrity of the workpiece. The numerical modeling approach presented in this work is capable of calculating internal material loads…
View article: Microstructural influence of consecutive deep rolling of AISI 4140
Microstructural influence of consecutive deep rolling of AISI 4140 Open
Deep rolling is used to increase the in-service life of parts due to reduced roughness, induced compressive residual stresses, and hardness alterations within the surface and subsurface layer. Depending on the process parameters, the same …
View article: Impact of pre-machining on the surface and subsurface characteristics of deep rolled metastable austenitic 18CrNiMo7-6
Impact of pre-machining on the surface and subsurface characteristics of deep rolled metastable austenitic 18CrNiMo7-6 Open
Steels with a certain amount of retained metastable austenite derived from e.g. heat treatment can undergo martensitic transformation induced by mechanical loads. Pre-machining is of high relevance for the following processes. Milling and …
View article: Feasibility of Optical Flow Field Measurements of the Coolant in a Grinding Machine
Feasibility of Optical Flow Field Measurements of the Coolant in a Grinding Machine Open
For industrial grinding processes, the workpiece cooling by metalworking fluids, which strongly influences the workpiece surface layer quality, is not yet fully understood. This leads to high efforts for the empirical determination of suit…
View article: Experimental Methods to Enable High-Throughput Characterization of New Structural Materials
Experimental Methods to Enable High-Throughput Characterization of New Structural Materials Open
Data-driven methods for developing new structural materials require large databases to identify new materials from known process routes, the resulting microstructures, and their properties. Due to the high number of parameters for such pro…
View article: Pulsed Mechanical Surface Treatment—An Approach to Combine the Advantages of Shot Peening, Deep Rolling, and Machine Hammer Peening
Pulsed Mechanical Surface Treatment—An Approach to Combine the Advantages of Shot Peening, Deep Rolling, and Machine Hammer Peening Open
Several manufacturing processes are used to beneficially influence the surface and subsurface properties of manufactured parts. Different aspects such as the surface topography or resulting residual stresses are addressed using different m…
View article: Modelling and Simulation of Mechanical Loads and Residual Stresses in Deep Rolling at Elevated Temperature
Modelling and Simulation of Mechanical Loads and Residual Stresses in Deep Rolling at Elevated Temperature Open
Based on the concept of Process Signatures, the deep rolling process is analyzed, aiming at functional relationships between material modifications and internal material loads during the process. The focus of this work is to investigate th…
View article: Sequential Processing of Cold Gas Sprayed Alloys by Milling and Deep Rolling
Sequential Processing of Cold Gas Sprayed Alloys by Milling and Deep Rolling Open
Cold gas spraying (CS) is a solid-state material deposition process which, in addition to the flexible repair of individual component areas, also enables the build-up of larger samples. The layers are created on a substrate by the impact-i…
View article: Optical Flow Field Measurements of The Coolant In A Grinding Machine
Optical Flow Field Measurements of The Coolant In A Grinding Machine Open
Since the cooling mechanism of industrial grinding is not yet fully understood, a measurement of the coolant liquid flow field near the grinding wheel is desired. However, the curved surfaces of the liquid phase result in unpredictable lig…
View article: Thermal Effects on Surface and Subsurface Modifications in Laser-Combined Deep Rolling
Thermal Effects on Surface and Subsurface Modifications in Laser-Combined Deep Rolling Open
Knowledge of the relationships between thermomechanical process loads and the resulting modifications in the surface layer enables targeted adjustments of the required surface integrity independent of the manufacturing process. In various …
View article: Combined laser and deep rolling process as a means to study thermo-mechanical processes
Combined laser and deep rolling process as a means to study thermo-mechanical processes Open
In thermo-mechanical processes, the effect of mechanical and thermal loads on resulting material modifications are not independent of each other. In order to analyze and understand their interaction, they should be varied independently fro…
View article: Characterizing the Local Material Properties of Different Fe–C–Cr-Steels by Using Deep Rolled Single Tracks
Characterizing the Local Material Properties of Different Fe–C–Cr-Steels by Using Deep Rolled Single Tracks Open
As part of a novel method for material development, deep rolling was used in this work to characterize the mechanical properties of macroscopic specimens of C45 (AISI 1045), S235 (AISI 1015), and 100Cr6 (AISI 52100) in various heat treatme…
View article: Reproducibility of High-Throughput Sample Properties Produced by a High-Temperature Molten Metal Droplet Generator
Reproducibility of High-Throughput Sample Properties Produced by a High-Temperature Molten Metal Droplet Generator Open
A high-throughput method for the discovery of structural materials requires a large number of samples with highly reproducible properties. We propose using spherical micro-samples, which can be quickly produced by molten metal single dropl…
View article: Multiscale Material Characterization Based on Single Particle Impact Utilizing Particle-Oriented Peening and Single-Impact Peening
Multiscale Material Characterization Based on Single Particle Impact Utilizing Particle-Oriented Peening and Single-Impact Peening Open
If conventional methods are used, the development of new structural materials is experience-based, but still intensive in terms of materials, time and cost. As part of the development of a new method for material development and characteri…
View article: Residual stress change in multistage grinding
Residual stress change in multistage grinding Open
Although high efforts were made to get a deeper understanding of grinding processes for many years, it is still not possible to clearly predict the alteration of the workpiece surface layer caused by grinding. To achieve this objective, th…
View article: Sequential multistage deep rolling under varied contact conditions
Sequential multistage deep rolling under varied contact conditions Open
It is possible to induce compressive residual stress, strain hardening and reduce the surface roughness by applying deep rolling to metallic surfaces. The resulting enhancement of surface integrity is based on the mechanical impact during …