Carsten Heinzel
YOU?
Author Swipe
View article: Comprehensive study of grinding burn limit and subsurface modifications in grinding with CBN and corundum abrasives
Comprehensive study of grinding burn limit and subsurface modifications in grinding with CBN and corundum abrasives Open
View article: A Statistical Test for Comparing the Linkage and Admixture Model Based on Central Limit Theorems
A Statistical Test for Comparing the Linkage and Admixture Model Based on Central Limit Theorems Open
In the Admixture Model, the probability that an individual carries a certain allele at a specific marker depends on the allele frequencies in $K$ ancestral populations and the proportion of the individual's genome originating from these po…
View article: Experimental and Numerical Analysis of Grinding Burn and Surface Layer Modification Depth after Case Hardening and subsequent Surface Grinding
Experimental and Numerical Analysis of Grinding Burn and Surface Layer Modification Depth after Case Hardening and subsequent Surface Grinding Open
View article: Revealing the range of maximum likelihood estimates in the admixture model
Revealing the range of maximum likelihood estimates in the admixture model Open
Many ancestry inference tools, including STRUCTURE and ADMIXTURE, rely on the admixture model to infer both, allele frequencies p and individual admixture proportions q for a collection of individuals relative to a set of hypothetical ance…
View article: Effect of alloy-specific case-hardening layers on the grindability of gears
Effect of alloy-specific case-hardening layers on the grindability of gears Open
Previous studies have already demonstrated a clear influence of the different subsurface microstructures resulting from variations in case-hardening on machinability during gear grinding. However, the impact of the alloy system has not yet…
View article: Tool concept for the increase of the mechanical process effect in grinding
Tool concept for the increase of the mechanical process effect in grinding Open
View article: Characterization of the performance of microbial-based metalworking fluids in grinding using cell analogues
Characterization of the performance of microbial-based metalworking fluids in grinding using cell analogues Open
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: Tiefenwirkung bei variierten Abrichtbedingungen/Depth effect under varied dressing conditions
Tiefenwirkung bei variierten Abrichtbedingungen/Depth effect under varied dressing conditions Open
Prozess- und Abrichtparameter beeinflussen die thermische Wirkung und damit die Energieumwandlung und Randzonenausbildung. Dies wird für einen ein- sowie dreistufigen Schleifprozess gegenübergestellt. Die Randzonen- und Tiefenbeeinflussung…
View article: 3D-Printed MWF Nozzles for Improved Energy Efficiency and Performance During Grinding
3D-Printed MWF Nozzles for Improved Energy Efficiency and Performance During Grinding Open
Particularly during grinding of metal workpieces, a high energy consumption is required during the main process times, so that the resulting energy costs represent a significant amount of the total operating costs of the machine tool. In t…
View article: Combination of Thermal and Mechanical Strategies to Compensate for Distortion Effects during Profile Grinding
Combination of Thermal and Mechanical Strategies to Compensate for Distortion Effects during Profile Grinding Open
This paper describes the investigations and the results of an analysis of distortion compensation processes for profile grinding. Steel workpieces often change their residual stress state due to machining in a seemingly uncontrolled matter…
View article: Modeling of Deep Rolling as a Distortion Compensation Strategy during Profile Grinding
Modeling of Deep Rolling as a Distortion Compensation Strategy during Profile Grinding Open
This paper analyzes the possibility to induce residual compressive stresses utilizing deep rolling in a long, slim steel workpiece that is profile ground and that resembles a linear guide rail. These intentionally caused residual compressi…
View article: Modeling of laser processing as a distortion compensation strategy for profile grinding
Modeling of laser processing as a distortion compensation strategy for profile grinding Open
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: Evaluation of Hardness and Residual Stress Changes of AISI 4140 Steel Due to Thermal Load during Surface Grinding
Evaluation of Hardness and Residual Stress Changes of AISI 4140 Steel Due to Thermal Load during Surface Grinding Open
During surface grinding, internal material loads are generated, which take effect on the surface and subsurface zone of AISI 4140 steel. High thermal loads can result in specific material modifications, e.g., hardness reduction and tensile…
View article: Influence of Subsequently Applied Mechanical and Thermal Loads on Surfaces Ground with Mechanical Main Impact
Influence of Subsequently Applied Mechanical and Thermal Loads on Surfaces Ground with Mechanical Main Impact Open
To generate advanced properties for the wear resistance and fatigue life of components and allow for an improved, application-oriented development of part specifications, a precisely tailored initial machining or manufacturing process is n…
View article: Simulation of internal material loads caused by multiple contacts in grinding with predominantly mechanical impact
Simulation of internal material loads caused by multiple contacts in grinding with predominantly mechanical impact Open
Grinding processes and their mechanical impact on the workpiece material are mainly characterized by multiple contacts between the workpiece surface and the single abrasive grains of the grinding wheel. The numerical modeling approach pres…
View article: Evaluation of approaches to compensate the thermo-mechanical distortion effects during profile grinding
Evaluation of approaches to compensate the thermo-mechanical distortion effects during profile grinding Open
This paper presents the results of a distortion analysis of profiled workpieces after the grinding process and a distortion compensation. Heat treatments and machining processes such as grinding change the residual stress state of steel wo…
View article: 3D modeling and simulation of thermal effects during profile grinding
3D modeling and simulation of thermal effects during profile grinding Open
A new heat transfer model for profile grinding was developed to analyze distortions caused by residual tensile stresses in linear guide rails. The simulative analysis of the thermal effects caused by a non-uniform heat source on the surfac…
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: 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: Sustainable machining by energy- and resource-efficient application of metalworking fluids
Sustainable machining by energy- and resource-efficient application of metalworking fluids Open
Due to increasing demands regarding the sustainability of manufacturing processes, a long service life and an energy-efficient supply of mineral-oil-based metalworking fluids is of increasing relevance. In the context of this work, the inf…
View article: Development of surface residual stress and surface state of 42CrMo4 in multistage grinding
Development of surface residual stress and surface state of 42CrMo4 in multistage grinding Open
In this study, cylindrical grinding of a 42CrMo4 (AISI 4140) steel with varied grinding sequence stages is analyzed regarding the effect of the different loads during multistage grinding up to the resulting final residual stress state and …
View article: Investigations on Material Loads during Grinding by Speckle Photography
Investigations on Material Loads during Grinding by Speckle Photography Open
The knowledge of the loads occurring during a manufacturing process (e.g., grinding) and of the modifications remaining in the material is used in the concept of process signatures to optimize the manufacturing process and compare it with …
View article: Correlations between Thermal Loads during Grind-Hardening and Material Modifications Using the Concept of Process Signatures
Correlations between Thermal Loads during Grind-Hardening and Material Modifications Using the Concept of Process Signatures Open
During the process of grind-hardening, the dissipated heat from the process is utilized for a surface layer hardening of machined components made of steel. A martensitic phase transformation occurs within the affected subsurface regions an…
View article: Analysis of internal material loads and resulting modifications for grinding with mechanical main impact
Analysis of internal material loads and resulting modifications for grinding with mechanical main impact Open
Mechanical impact in grinding processes can improve the properties of the workpiece surface and subsurface layer and therefore have a positive effect on the functional performance of the finished component. Although changes in the surface …
View article: Process Signatures - The Missing Link to Predict Surface Integrity in Machining
Process Signatures - The Missing Link to Predict Surface Integrity in Machining Open
The concept of Process Signatures is based on the correlation between the internal material loads in manufacturing processes and the resulting material modifications, thus allowing a deeper and more comprehensive understanding of the under…
View article: Grinding Fluid Jet Characteristics and Their Effect on a Gear Profile Grinding Process
Grinding Fluid Jet Characteristics and Their Effect on a Gear Profile Grinding Process Open
Profile gear grinding is characterized by a high level of achievable process performance and workpiece quality. However, the wide contact length between the workpiece and the grinding wheel is disadvantageous for the fluid supply to the co…
View article: Measuring strain during a cylindrical grinding process using embedded sensors in a workpiece
Measuring strain during a cylindrical grinding process using embedded sensors in a workpiece Open
This paper presents the results of using a sensor-integrated workpiece for in situ measurement of strain during an outer-diameter cylindrical grinding process. The motivation of this work is to measure in situ process parameters using inte…
View article: Materialwissenschaft und Werkstofftechnik 8/2016
Materialwissenschaft und Werkstofftechnik 8/2016 Open