6th International Congress on 3D Materials Science (3DMS 2022): Functional Materials
Program Organizers: Dorte Juul Jensen, Technical University of Denmark; Marie Charpagne, University of Illinois; Keith Knipling, Naval Research Laboratory; Klaus-Dieter Liss, University of Tennessee, Knoxville; Matthew Miller, Cornell University; David Rowenhorst, US Naval Research Laboratory
Wednesday 8:20 AM
June 29, 2022
Room: Capitol A
Location: Hyatt Regency Washington on Capitol Hill
Session Chair: George Spanos
8:20 AM Invited
3D Mapping of Residual Stresses Using Synchrotron Micro-diffraction: Yubin Zhang1; 1Technical University of Denmark
Local residual stresses develop in nearly all crystalline materials during manufacturing or while in service, and they are critical for materials physical and mechanical properties. However, only limited knowledge regarding their spatial distribution exists due to the limitations of standard characterization techniques. In the present work, advanced 3D synchrotron micro-diffraction is used to map the distribution of residual strains/stresses within individual grains in single and two-phase materials. The results are related to parameters such as the crystallographic orientation, grain size, dislocation density and the size of the second phase particles. Thereby breakthroughs have been achieved in the understanding of the origin of local residual stresses. Also results from in-situ investigations of local residual stress upon external loading will be presented. Local residual stress is generally overlooked in current models for microstructural development. It is discussed how the present data sets provide critical input for advancing the models.
8:50 AM
Multiscale 3-dimensional Imaging and Modelling in Energy Materials Research: Stephen Kelly1; Robin White1; Hrishikesh Bale1; William Harris1; William Fadgen1; Tobias Volkenandt1; Andreas Griesser2; 1Carl Zeiss RMS; 2Math2Market, GmbH
A key aspect in materials science is the ability to generate new material designs with specific characteristics to provide a particular function that improves performance and lifetime in a working device. Due to the non-destructive 3D imaging capabilities of X-ray Computed Tomography, unique insight into material microstructure with comparatively minimal sample processing is achieved. This capability is ideal for imaging energy materials, which are often comprised of an interconnected 3-dimensionsal microstructure, spanning orders of magnitude, as well as various material properties that can be difficult to visualize using other imaging methods such as electron microscopy. We present here results combining micro- and nano-scale x-ray microscopy using reconstructions aided by deep learning to prepare comprehensive data collections for use in simulations of fuel cell and battery performance. Key material performance metrics are obtained, as well as full battery charging and discharging simulations.
9:10 AM
Amorphous-crystalline Nanostructural Nd-Fe-B Permanent Magnets using Laser Powder Bed Fusion: Metallurgy and Magnetic Properties: Julan Wu1; Nesma Aboulkkhair2; Michele Degano1; Richard Hague1; Ian Ashcroft1; 1University of Nottingham; 2Technology Innovation Institute
Laser powder-bed fusion (L-PBF) additive manufacturing (AM) has attracted wide interest for the production of Nd-Fe-B permanent magnets, benefitting from minimising the mineral waste of the rare-earth elements and post-process procedures. Most research on L-PBF Nd-Fe-B focused on reducing defects in the printed parts and the resultant magnetic properties. Detailed analysis of the microstructure that results in the permanent magnetic properties is yet to be published. In this research, a combination of high-resolution microstructural investigations were conducted for this purpose. For the first time, an in-depth analysis of the grain structure in terms of the morphology, size distribution, and texture is presented and correlated to the permanent magnetic performance. The mechanism of the phase formation, the nanocrystalline microstructure and the process-structure-property relationship is presented in this paper to provide guidelines for future development of the L-PBF Nd-Fe-B.
9:30 AM
3D Phase Formation of 2D Materials Embedded Lunar Regolith During Sintering: Jiaoli Li1; Yanxiao Li1; Congjie Wei1; Mianqing Yang1; Aditya Thakur2; Manuel Ortega2; Stefan Linke2; Frank Liou1; Enrico Stoll3; Enrico Stoll3; Chenglin Wu1; 1Missouri University of S&T; 2Technische Universität Braunschweig; 3Technische Universität Berlin
As one of the most promising in-situ lunar construction methods, lunar regolith sintering shows great advantages since its widespread raw material, simple production method and stable product properties. In this work, regolith simulant was added with two-dimensional (2D) materials (graphene and MXene). The sintered products of pure regolith simulant and its composites under different sintering temperature were studied. Micro-CT scan, scanning electron microscope, transmission electro microscope and X-ray diffraction were used to for microstructure characterizations. The 3D porous network, phase distribution, and 2D material distributions will be determined. Nanoindentation testing were conducted to quantify the mechanical properties of sintered pure regolith simulant and its composites. To understand the phase formation mechanism, a phase-field modeling approach will be utilized to investigate the effect of 2D materials (as interfaces) on the recrystallization process during the sintering. The effects of 2D materials concentration and sintering temperature profiles will be quantified through the modeling.
9:50 AM Break
10:10 AM
A Review on Emulsion Polymerization Based Synthesis, Fabrication and Photonic Application of 3D P(St-MMA-AA) Photonic Crystals: Ikhazuagbe Ifijen1; Esther Ikhuoria2; Gregory E. Onaiwua3; Udokpoh Nyaknno1; Aireguamen Aigbodion1; Augustine Ighodaro4; Stanley Omorogbe1; 1Rubber Research Institute of Nigeria; 2University of Benin, P.M.B. 1154, Benin City, Nigeria; 3Department of Physical Sciences, Benson Idahosa University, P.M.B. 1100, Benin City, Edo State; 4Quantum pharmaceuticals, Quantum House, Durham United Kingdom
The possible applications of photonic crystals (PhCs) in photonics and optics have increased their relevance in recent times. The propensity of PhCs to interact with light in their structure has led to a variety of thrilling and extraordinary features, which have shown possible usage in the generation of full-colour displaying films, coatings, switches, filters, photonic papers, responsive optical devices, etc. Polymeric materials have played an important part in the fabrication of PhCs owing to exceptional properties such as high strength, resistance to corrosion, resilience, colour, transparency, processing, and low cost. Among the utilized polymers, poly(styrene-methylmethacrylate-acrylic acid) (P(St-MMA-AA) has been utilized by several studies to generate photonic crystals with unique structural colours for photonic application due to the exceptional features introduced by its functional groups. This study detailed a brief description of the synthesis via emulsion polymerization, fabrication and photonic application of 3D P(St-MMA-AA) photonic crystals.
10:30 AM
Investigation of Neutron-irradiated Microstructure of Fe-Cr System: A GPU Accelerated Phase-field Method
: Jeonghwan Lee1; Bohyun Yoon1; Wooseob Shin1; Kunok Chang1; 1Kyunghee University
Ferritic martensitic steels are promising structural materials due to their low swelling rate under the fast neutron irradiation. However, in the case of Fe-Cr steels, precipitation of Cr rich phase ( α' phase) near 475°C is still pointed out as a weak point in the view point of structural integrity. Since many studies reveal that phase play an important role in hardening/embrittlement of ferritic martensitic steels, understanding the spinodal decomposition behavior of Fe-Cr systems has been an important topic in studying the integrity of structural materials. Especially under the fast neutron irradiation, a dislocation loop generally occurs and it accelerates the precipitation of phase. In this study, we analyzed an effect of dislocation loop in precipitation and growth behavior of phase using the phase-field method in 3D. In addition, we considered elastic interaction between a dislocation loop and a precipitate using GPGPU parallelizing technique
10:50 AM Break