Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application: Poster Session I
Sponsored by: TMS Structural Materials Division, TMS: Alloy Phases Committee
Program Organizers: Wei Xiong, University of Pittsburgh; Dana Frankel, Apple Inc; Gregory Olson, Massachusetts Institute of Technology
Tuesday 5:30 PM
March 1, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center
M-16: Effect of Nozzle Structure Parameters on Liquid Steel Flow Behavior in Slab Mold: Sikun Peng1; 1Chongqing University
In this paper, the effects of the side hole area, shape and angle of the submerged nozzle on the liquid level fluctuation, impact depth, slag layer thickness and slag entrapment times of molten steel in slab mold were studied by combining mathematical simulation with physical simulation. The results show that with the increase of side hole area, the fluctuation degree of liquid level in the mold decreases, the impact depth decreases, and the thickness difference of liquid slag layer increases; With the change of side hole shape from rectangle to ellipse, the fluctuation degree of liquid level, impact depth and thickness difference of liquid slag layer decrease,; With the increase of side hole angle, the fluctuation degree of molten steel level in the mold decreases, the impact depth increases, and the thickness difference of liquid slag layer increases,. The research results can provide a theoretical basis for the design of reasonable mold nozzle.
M-17: Influence of Single Fold and Double Fold on the Stress and Strain of AMOLED Module: Qiujun Wang1; Weiwei Su1; Di Zhang1; Weijin Ji2; Bo Wang1; 1Hebei University of Science and Technology; 2Hebei Special Equipment Supervision and Inspection Institute
Choosing the right bending method is an important way to optimize the flexible AMOLED. In this paper, a nonlinear finite element analysis method is used to propose and establish a drop shaped model in the double fold. This article focuses on the bending stress analysis of foldable panel, composed of plastic substrate PVA, adhesive layer, plastic layer PI, organic layer and conductive layer ITO to form a seven-layer laminated structure. Analysis and comparison of the stress conditions under single fold and double fold. In the case of double-folding, the overall mises stress will increase by 100MPa, which means that the double-folding model will experience more squeezing force than the single-folding model during use. The maximum stress in the Cover film is 670 MPa, while the single fold is 550 MPa. Through comparison, the single-fold model is more suitable for flexible AMOLED panel bending design.
NOW ON-DEMAND ONLY – M-18: Microwave Dielectric Spectroscopy of Intrinsic and Doped HKUST-1 Metal-organic Framework Films: Papa K. Amoah; Zeinab Hassan1; Helmut Baumgart2; Y.S. Obeng3; Engelbert Redel1; Abdelmageed Elmustafa2; 1Karlsruhe Institute of Technology (KIT), Institute of Functional Interfaces (IFG), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; 2Old Dominion University; 3Physical Measurement Laboratory, National Institute of Standards and Technology NIST
Metal-organic-framework (MOF) films are designed scaffold-like compounds consist of metal ions connected by organic ligands, forming highly ordered porous structures. Recently, it has been reported that the electrical properties of bulk host MOFs can be modulated by infiltrating guest molecules (metal clusters) inside the porous MOF framework. In this work intrinsic non-doped highly oriented Surface Anchored Metal-Organic Framework (SURMOF) films were fabricated quasi-epitaxial and benchmarked against doped MOF films loaded with tetracyano-quinodimethane (TCNQ) infiltration. MOF films of Cu3(BTC)2 (BTC: benzene tri-carbonicacid), known as HKUST-1, have been grown using a liquid phase epitaxy (LPE) spray method in which the metal-containing solution [1 mmol Cu(OAc)2] and the linker solution [0.1 mmol BTC] are sprayed alternately on modified silicon substrates. Subsequently, the samples were immersed into an ethanoic TCNQ solution. In this study microwave broadband dielectric spectroscopy has been applied to investigate radio frequency propagation characteristics in pristine versus TCNQ infiltrated SURMOF films.
M-19: Optimization of Parameters in Modified Strain-induced Melt Activation Process for Al-7Si Alloy: Chandan Choudhary1; Kanai Lal Sahoo2; Durbadal Mandal3; 1Maharashtra Institute of Technology, Aurangabad; 2CSIR-NML Jamshedpur; 3NIT Durgapur
Strain-induced melt activation (SIMA) technique is gaining huge importance in manufacturing industries, necessitates for low-cost production. In this research work, the processing parameters such as effective strain, reheating isothermal temperature and holding time in modified strain-induced melt activation (M-SIMA) process of Al-7Si are optimized using response surface methodology. The responses mainly, Ultimate Tensile Strength (UTS, MPa) and Elongation (El, %) are considered as a function of different processing parameters (effective strain, isothermal temperature and holding time). The regression analysis method is used to develop the mathematical model for responses, and the covenant of the developed model is endorsed by the variance method. It has been observed that desirable values of effective strain, isothermal temperature, and holding time to be 0.6, 585°C, and 30 min, respectively. Based on process parameters for M-SIMA process, a high strength (UTS = 206 MPa) with superior ductility (El = 32%) of Al-7Si alloy is observed.
M-20: Phase Field Modeling Investigation of Polycrystalline Grain Growth Using a Spherical-Gaussian-Based 5-D Computational Approach: Lenissongui Yeo1; Michael Costa1; Jacob Bair1; 1Oklahoma State University
Spherical gaussians, allowing the modeling of complex anisotropies, are used in modeling anisotropic polycrystalline grain growth (GG). Quaternions, assigned to individual grains as orientations and as misorientations for grain boundaries, conduct the ongoing mesoscale changes. A 5-D space scanning generates meaningful grain boundaries; inputted into the continuous function developed by Bulatov et al. to calculate grain boundary energy (GBE); which local minimas are used in the phase field model. The methodology involves using 2-D gaussian switches, which match the misorientation between grains with misorientations for the GBE minima. Accounting a threshold range for the minimas, the switch activates a Spherical Gaussian to set the GBE to the desired value; creating in combination a full 5-D GBE space. Multiphysics Object Oriented Simulation Environment (MOOSE), where reduced order parameters still retain individual grain identification useful for individually assigned quaternions, is used for implementation; with validation performed through bicrystal simulations of known outcomes.