ABSTRACT This study investigates the fatigue life of AlSi10Mg alloy produced by laser powder bed fusion (LPBF) using experimental and multiscale modeling methods. A micromodel developed based on EBSD SEM data simulates microcrack nucleation with Tanaka–Mura model FEM. The effects alloys heterogeneous microstructure, including SiC particles, crack initiation are examined. Micropillar tests high‐resolution analyses slip system behavior plastic deformation. Long propagation is analyzed NASGRO...

An investigation on the White Etching Crack (WEC) phenomenon as a severe damage mode in bearing applications led to observation that latent pre-damage state period, visible alterations appear surface of raceway. A detailed inspection microstructure underneath reveals existence plenty nano-sized pores depth range 80 µm 200 µm. The maximum Hertzian stress is calculated be at 127 subsurface. present study investigates effect these nanopores fatigue crack initiation SAE 52100 martensitic...

A comprehensive approach to understand the mechanical behavior of materials involves costly and time-consuming experiments. Recent advances in machine learning field computational material science could significantly reduce need for experiments by enabling prediction a material's behavior. In this paper, reliable data pipeline consisting experimentally validated phase simulations finite element analysis was created generate dataset dual-phase steel microstructures behaviors under different...

Abstract Single-lip deep-hole drilling (SLD) is characterized by high surface quality and compressive residual stress in the subsurface of drill hole. These properties depend significantly on thermomechanical conditions machining process. The desired can be adjusted in-process via process monitoring near cutting zone with a sensor-integrated tool closed loop control when are maintained optimum range. In this paper, method presented to adjust subsurface. model integrated controller...

Single-lip deep-hole drilling (SLD) is characterized by high surface quality and compressive residual stress in the subsurface of drill hole. These properties depend significantly on thermo-mechanical conditions machining process. The required can be adjusted in-process via process monitoring control when are maintained optimum range. Herein, a sensor-integrated SLD tool introduced, which allows temperatures near cutting zone to measured vibrations occurring directly at head recorded. A...

ABSTRACT The present study deploys a continuum mechanics approach called peridynamics to investigate the damage behaviour of 2D microstructure, which was taken from plasma sprayed ceramic coating used in solid oxide fuel cell (SOFC) sealing systems. At beginning, two benchmark cases, namely, plate with hole as well single edge notch, are considered. results compared an analytical solution and very good agreement is obtained. Based on these findings, microstructural model SOFC systems...

Abstract To adjust the defined surface and peripheral zone properties, such as hardness, residual stresses quality, machining processes are in many cases followed by forming or heat treatment processes. A focused management of process can already desired properties. The here presented work is part an interdisciplinary research project framework priority program Surface Conditioning Machining Processes (SPP 2086) German Research Foundation (DFG). This has main objectives to determine...

Abstract The surface quality and the subsurface properties such as hardness, residual stresses grain size of a drill hole are dependent on cutting parameters single lip deep drilling process therefore thermomechanical as-is state in zone contact between guide pads surface. In this contribution, main objectives in-process measurement thermal by means thermocouples well feed force torque evaluation. FE simulation results to verify investigations predict conditions presented well. work is part...

In the present work, applicability of coupled Eulerian-Langragian method (CEL) was proved to model a drilling process. The CEL enables complex three dimensional simulations with large deformations very time efficient sufficient accuracy. this study, different process parameters were applied and resulting feed force, maximum temperature residual stress in subsurface region evaluated validated by comparison experimental data. With simulation data regression models developed, which can be used...

Auxetic structures made of biodegradable polymers are favorable for industrial and daily life applications. In this work, poly(butylene adipate-co-terephthalate) (PBAT) is chosen the study deformation behavior an inverse-honeycomb auxetic structure manufactured using fused filament fabrication. The focus on behavior. One characteristic polymer prediction finite element (FE) simulation that no sounded FE model exists, due to significantly different under loading. poses more challenges,...

The current work investigates the auxetic tensile deformation behavior of inversehoneycomb structure with 5 × cells made biodegradable poly(butylene adipate-coterephthalate) (PBAT). Fused deposition modeling, an additive manufacturing method, produced such specimens. Residual stress (RS) and warpage, more or less, always exist in specimens due to layer-by-layer fabrication, i.e., repeated heating cooling. RS influences behavior, but its measurement is challenging very fine structure....

To adjust the subsurface workpiece properties, such as hardness and residual stresses well surface quality, machining processes are often followed by forming, peening or heat treatment processes. An appropriate setup of process can desired properties. The work presented here is part an interdisciplinary research project in framework priority program "Surface Conditioning Machining Processes" (SPP 2086) German Research Foundation (DFG). This has main objectives to determine actual...

Single-lip deep hole drilling (SLD) is characterized by a high surface quality and compressive residual stress in the subsurface of drill hole. These properties are strongly dependent on cutting parameters SLD process actual geometry insert guide pads. In present work, full 3D FE simulations were carried out to analyze thermo-mechanical as-is state contact zone evaluating feed force, temperature, as well subsurface. An extensive simulation study was conducted effect using design experiments...

The surface quality and the subsurface properties such as hardness residual stress of a drill hole are dependent on cutting parameters single lip deep drilling process therefore thermo-mechanical as-is state in zone contact between guide pads surface. In present work, this highly dynamic unsteady-state including large deformation heat generation FE simulations were carried out to analyze mechanical by evaluating temperature, feed force well subsurface. Besides, in-process measurements...

Abstract The current paper reports self-healing plasma sprayed Mgspinel (MgAl2O4) coatings. coatings were used for electrical insulation in high temperature fuel cells. A range of potential additives consisting SiC+X (where X was BaO, CaO, ZnO, Y2O3, GeO2, Ta2O5, V2O5) characterized and SiC+Y2O3 initially selected coating development. Coatings spinel with 20wt% additive developed using vacuum spraying (VPS) or atmospheric (APS). In the coatings, demonstrated after heat treatment at 1050°C...

Shape memory polymers (SMPs) are introduced as that have the ability to return their early programmed shape after exposure an external stimulus. Enhancement of material with nano-clay filler has improved its thermomechanical properties and increased range applications in many fields industry. Due tiny size heterogeneous nature structure at different scale levels, characterizing material’s flow using conventional experimental equipment is a far-fetched task. Furthermore, providing one...

In this study, we quantitatively investigate the impact of 1.4 wt.% chromium and molybdenum additions on pearlitic microstructure characteristics in 1 carbon steels. The study was carried out using a combination experimental methods phase field simulations. We utilized MatCalc v5.51 JMatPro v12 to predict transformation behaviors, electron microscopy for microstructural examination, focusing pearlite morphology under varying thermal conditions. Phase simulations were MICRESS v7.2 software...

In this study, the fatigue life of AlSi10Mg alloy produced by laser powder bed fusion (LPBF) method is investigated through an extensive experimental and methodological approach. Electron backscatter diffraction (EBSD) scanning electron microscope (SEM) analyses were conducted to examine microstructural features material. Micropillar tests performed assess deformation slip movement dislocation systems, as well evaluate critical resolved shear stress (CRSS), which a crucial parameter...

The usage of synthetic nonwoven materials is gaining importance in filtration. However, the complex material behavior these synthetic, fiber-based challenging for manufacturing departments. are exhibiting a highly anisotropic elastic-plastic behavior. A testing program was conducted to characterize unknown characteristic filter media all three spatial directions load cases tension, compression, and shear first time. For conversion processes like cutting, embossing, calendering, pleating,...