scholarly journals Parameter Optimization in High-Throughput Testing for Structural Materials

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3439 ◽  
Author(s):  
Alexander Bader ◽  
Anastasiya Toenjes ◽  
Nicole Wielki ◽  
Andreas Mändle ◽  
Ann-Kathrin Onken ◽  
...  
Keyword(s):  
Design Of Experiments ◽  
High Throughput ◽  
Process Parameters ◽  
Material Properties ◽  
Functional Materials ◽  
Structural Materials ◽  
Major Influence ◽  
Test Procedures ◽  
Scanning Calorimetry ◽  
Target Values

High-throughput screenings are established evaluation methods in the development of functional materials and pharmaceutical active ingredients. The transfer of this approach to the development of structural materials requires extensive adaptations. In addition to the investigation of new test procedures for the determination of material properties and the treatment of metallic materials, the design of experiments is a research focus. Based on given descriptor target values, the statistical design of experiments determines investigations and treatments for the investigation of these materials. In this context, process parameters also have to be determined, as these have a major influence on the later material properties, especially during the treatment of samples. In this article, a method is presented which determines the process parameters iteratively. The validation of the calculated process parameters takes place based on differential scanning calorimetry used as the furnace for the heat treatment of small batches and particle-oriented peening as the characterization method.

scholarly journals Descriptors for High Throughput in Structural Materials Development

2019 ◽  
Vol 8 (4) ◽  
pp. 22 ◽  
Author(s):  
Matthias Steinbacher ◽  
Gabriela Alexe ◽  
Michael Baune ◽  
Ilya Bobrov ◽  
Ingmar Bösing ◽  
...  
Keyword(s):  
High Throughput ◽  
Material Properties ◽  
Functional Materials ◽  
Structural Materials ◽  
Materials Development ◽  
Characterization Techniques ◽  
Classical Characterization ◽  
Short Time ◽  
Characteristic Microstructure ◽  
Intense Process

The development of novel structural materials with increasing mechanical requirements is a very resource-intense process if conventional methods are used. While there are high-throughput methods for the development of functional materials, this is not the case for structural materials. Their mechanical properties are determined by their microstructure, so that increased sample volumes are needed. Furthermore, new short-time characterization techniques are required for individual samples which do not necessarily measure the desired material properties, but descriptors which can later be mapped on material properties. While universal micro-hardness testing is being commonly used, it is limited in its capability to measure sample volumes which contain a characteristic microstructure. We propose to use alternative and fast deformation techniques for spherical micro-samples in combination with classical characterization techniques such as XRD, DSC or micro magnetic methods, which deliver descriptors for the microstructural state.

scholarly journals 3D-Printed Polyester-Based Prototypes for Cosmetic Applications—Future Directions at the Forensic Engineering of Advanced Polymeric Materials

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 994 ◽  
Author(s):  
Joanna Rydz ◽  
Wanda Sikorska ◽  
Marta Musioł ◽  
Henryk Janeczek ◽  
Jakub Włodarczyk ◽  
...  
Keyword(s):  
Material Properties ◽  
Three Dimensional ◽  
Accelerated Aging ◽  
Polymeric Materials ◽  
Gel Permeation Chromatography ◽  
Operating Conditions ◽  
Test Procedures ◽  
Scanning Calorimetry ◽  
New Strategy ◽  
Forensic Engineering

Knowledge of degradation and impairment phenomena of (bio)degradable polymeric materials under operating conditions, and thus the selection of test procedures and prediction of their behavior designates the scope and capabilities as well as possible limitations of both: the preparation of the final product and its durability. The main novelty and objective of this research was to determine the degradation pathways during testing of polylactide and polylactide/polyhydroxyalkanoate materials made with three-dimensional printing and the development of a new strategy for the comprehensive characterization of such complex systems including behavior during waste disposal. Prototype objects were subjected to tests for damage evolution performed under simulating operating conditions. The reference samples and the tested items were characterized by gel permeation chromatography and differential scanning calorimetry to determine changes in material properties. The studies showed that: polyhydroxyalkanoate component during accelerated aging and degradation in environments rich in microorganisms accelerated the degradation of the material; paraffin accelerates polylactide degradation and slows degradation of polyhydroxyalkanoate-based material; under the influence of an environment rich in enzymes, paraffin contamination accelerates biodegradation; under the influence of natural conditions, paraffin contamination slowed degradation; the processing conditions, in particular the printing orientation of individual parts of the container, influenced the material properties in its various regions, affecting the rate of degradation of individual parts.

scholarly journals A FEM-Based 2D Model for Simulation and Qualitative Assessment of Shot-Peening Processes

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2784
Author(s):  
Georgios Maliaris ◽  
Christos Gakias ◽  
Michail Malikoutsakis ◽  
Georgios Savaidis
Keyword(s):  
Process Parameters ◽  
Material Properties ◽  
Shot Peening ◽  
Qualitative Assessment ◽  
Experimental Investigations ◽  
Elastoplastic Material ◽  
Size Distributions ◽  
User Friendly ◽  
The Impact ◽  
2D Model

Shot peening is one of the most favored surface treatment processes mostly applied on large-scale engineering components to enhance their fatigue performance. Due to the stochastic nature and the mutual interactions of process parameters and the partially contradictory effects caused on the component’s surface (increase in residual stress, work-hardening, and increase in roughness), there is demand for capable and user-friendly simulation models to support the responsible engineers in developing optimal shot-peening processes. The present paper contains a user-friendly Finite Element Method-based 2D model covering all major process parameters. Its novelty and scientific breakthrough lie in its capability to consider various size distributions and elastoplastic material properties of the shots. Therewith, the model is capable to provide insight into the influence of every individual process parameter and their interactions. Despite certain restrictions arising from its 2D nature, the model can be accurately applied for qualitative or comparative studies and processes’ assessments to select the most promising one(s) for the further experimental investigations. The model is applied to a high-strength steel grade used for automotive leaf springs considering real shot size distributions. The results reveal that the increase in shot velocity and the impact angle increase the extent of the residual stresses but also the surface roughness. The usage of elastoplastic material properties for the shots has been proved crucial to obtain physically reasonable results regarding the component’s behavior.

scholarly journals Additive Manufacturing of Flexible Material for Pneumatic Actuators Application

Actuators ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 161
Author(s):  
Miranda Fateri ◽  
João Falcão Carneiro ◽  
Achim Frick ◽  
João Bravo Pinto ◽  
Fernando Gomes de Almeida
Keyword(s):  
Material Properties ◽  
Thermoplastic Polyurethane ◽  
Scanning Calorimetry ◽  
Pneumatic Actuators ◽  
Geometry Design ◽  
Flexible Material ◽  
Layer Manufacturing ◽  
Thermoplastic Polyurethane Elastomer ◽  
Manufacturing Techniques ◽  
Circular Design

In this paper, endurance of peristaltic linear pneumatic actuators was studied using different hose geometries. Towards this goal, different hose geometries were additively manufactured using Fused Layer Manufacturing techniques of Thermoplastic Polyurethane Elastomer. Material properties of the elastomer were studied using Differential Scanning Calorimetry and the tensile test. The relations between the sample’s print temperature and build direction on the actuator endurance were investigated. Lastly, the relation between the geometry design of the PLPA actuator and its endurance is also discussed. Based on this methodology, authors present results showing that the use of a customized shaped hose with geometrical reinforcement at sides leads to a considerable rise in the hose endurance, when compared with the conventional circular design.

Schadenserfassung auf Radsatzlaufflächen/Defect detection on wheelset treads – Measurement of Magnetic Barkhausen Noise to detect varying workpiece conditions

2019 ◽  
Vol 109 (11-12) ◽  
pp. 811-815
Author(s):  
B. Denkena ◽  
B. Bergmann ◽  
H. Blech
Keyword(s):  
Acoustic Emission ◽  
Process Parameters ◽  
Defect Detection ◽  
Material Properties ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Optimal Process ◽  
Process Reliability

Unterschiedliche Belastungshistorien von Eisenbahnrädern führen zu Werkstoffveränderungen in der Lauffläche. Diese verursachen sporadisches Werkzeugversagen und verringern so die Prozesssicherheit. Die Messung der Material- und Prozesseigenschaften mit Barkhausenrauschen und Körperschall erlauben, individuelle Bearbeitungsparameter für jedes Exemplar festzulegen. Gezeigt werden die Herausforderungen in der Radsatzbearbeitung, und welche Informationen sich durch die Messtechniken gewinnen lassen.   Different load histories of train wheels lead to high variance of material properties on the running tread. Those cause unpredictable tool break and reduce process reliability. The measurement of magnetic Barkhausen noise and acoustic emission allow to gain information of the workpiece and the running process, to find optimal process parameters for the reconditioning of every individual wheel. Typical issues in train wheel machining and results of measurements are presented.

Effect of material properties and process parameters on quality of friction stir forming

2021 ◽  
Vol 70 ◽  
pp. 553-559
Author(s):  
Francesco Gagliardi ◽  
Mahsa Navidirad ◽  
Giuseppina Ambrogio ◽  
Wojciech Z. Misiolek
Keyword(s):  
Process Parameters ◽  
Material Properties ◽  
Friction Stir
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