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Begoña Santillana (Tata Steel R&D)20/06/2019, 17:53PosterOne of the most powerful tools for studying the development of microstructures is the CALPHAD (Calculated PHAse Diagrams) method because it comprises information derived from thermodynamic principles, presented in a form that makes the data readily accessible. It is much easier and less time consuming to perform these thermodynamic calculations with any of the available software rather than...Go to contribution page
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Prof. Jiang Wang (State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, Shanghai University)20/06/2019, 17:54Poster**Abstract:** A virtual submesh cellular automata method is established to reduce the computational mesh induced artificial anisotropy with high efficiency and the method is applied to simulate the microstructure evolution during laser melting additive manufacturing. The additive manufacturing process is divided into three parts during simulation: random powder deposition, laser melting and...Go to contribution page
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Tuomas Alatarvas (Process Metallurgy Research Unit, University of Oulu, Finland)20/06/2019, 17:55PosterThe targets of this study were to determine the effect of vertical location and the composition of inclusions to the occurrence of oxide–sulfide stringers, and to determine the calcium aluminate phases most prone to form stringers during hot rolling of aluminium killed, calcium treated steel. The phases present in the inclusions have a significant effect on the deformation of inclusions during...Go to contribution page
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Anis Umi Saadah Binti Othman (University of British Columbia)20/06/2019, 17:56PosterComputational process modelling has become an important engineering tool in the casting industry to predict the solidification sequence in complex castings. Used properly, this tool can help reduce manufacturing costs. One of the challenging issues in developing casting simulations of the low pressure die casting (LPDC) process for automotive wheels is to quantify the heat transfer...Go to contribution page
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Anurag Bhatt (Tata iQ), Ranjay Singh (Tata Steel)20/06/2019, 17:57PosterA method for detecting sticker breakouts in continuous casters is proposed based on extensive feature engineering and advanced analytical modelling. It is observed that the temperature patterns generated during a sticker breakout have a consistent signature, owing to the underlying physical processes involved. The aim of the present exercise is to capture this latent physical phenomenon in a...Go to contribution page
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114. NUMERICAL SIMULATIONS OF ELECTROMAGNETIC COUNTERACTIONS TO MOLD FLUID FLOW ASYMMETRY DEVIATIONSMartin Sedén (ABB)20/06/2019, 18:00PosterAsymmetric flow of the molten steel in a continuous slab casting mold may be detrimental to the quality of the solidified end product. Depending on the severity of the biased flow, local mold powder entrainment, non-homogeneous solidification around the perimeter of the initial shell or non-optimal inclusion seclusion may occur. In particular, nozzle clogging in the last slabs before an SEN...Go to contribution page
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Christian Bernhard (Montanuniversitaet Leoben)20/06/2019, 18:01PosterAs nonmetallic inclusions (NMI) are unavoidable in steel production and commonly have a negative impact on product quality. Metallurgical research has always aimed at either the adjustment of inclusion morphology or inclusion separation to minimize their adverse effects. In the 1990s the conscious nucleation of particles to either promote or inhibit the subsequent growth of other phases became...Go to contribution page
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Gildas Guillemot (CEMEF, Centre de Mise en Forme des Matériaux - Mines ParisTech)20/06/2019, 18:04PosterLaser Beam Melting (LBM) processes benefit from significant progress in recent years. Currently, manufacturing of ceramic parts for applications at high temperature in aeronautical industries can be planned. However, understanding of defect formation is required in order to optimize manufacturing strategy. In this work, level-set modelling is proposed to simulate tracks development during LBM...Go to contribution page
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Takuya Fujinaga (The University of Tokyo)20/06/2019, 18:05PosterSince it is not straightforward to directly observe nucleation at the initial stage of solidification in experiments, investigation from computational approach is strongly desired. In this study, influence of grain refiner in heterogeneous nucleation of undercooled Al melt is investigated by molecular dynamics calculations. Particularly, we focus temperature, size of the refiner, and...Go to contribution page
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Yasushi Shibuta (The University of Tokyo)20/06/2019, 18:08PosterWe have performed the large-scale molecular dynamics simulations for nucleation, solidification and microstructure formation [1] and found various new insights such as the heterogeneity in homogeneous nucleation [2] and decrease of the averaged grain boundary mobility during the grain growth [3]. Although these studies were performed using pure metallic system for simplicity, the most of...Go to contribution page
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Bruno Lebon (BCAST, Brunel University London)20/06/2019, 18:09PosterMelt conditioning, i.e. shearing of liquid metal using a rotor-stator device, refines the grain structure without the need for grain refiners. Melt conditioning as applied to direct-chill (DC) casting, forming the MC-DC process, has recently been demonstrated to be an effective method of producing high quality light alloy billets. The optimisation of melt conditioning parameters through...Go to contribution page
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Alain Jacot (BCAST, Brunel University London)20/06/2019, 18:10The high pressure die casting process is extensively used to manufacture light metal parts with high productivity. A major drawback of the process is the relatively high variability in mechanical properties and poor repeatability between casting cycles, limiting the achievement of weight reduction through lighter design. Although it has been established that mechanical properties are...Go to contribution page
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Prof. Zhongyun Fan (Brunel University London)20/06/2019, 18:12The accumulation of iron in molten aluminium is one of the main concerns for the recycling and casting industries because it leads to the formation of undesirable Fe-rich intermetallic compounds which are detrimental to mechanical properties. Many methods have been developed in the past to reduce the iron accumulated in molten aluminium scrap, but they all suffer from poor efficiency. Hence, a...Go to contribution page
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Prof. Zhongyun Fan (BCAST, Brunel University London, UK)20/06/2019, 18:13It has been reported that native MgO particles in Mg alloy melts can act as heterogeneous nucleation substrates such that grain refinement of Mg alloys is achieved. A recent study showed the addition of Ca, combined with the native MgO particles, significantly improves grain refinement of Mg and its alloys. However, the mechanism underlying the grain refining phenomenon is not well understood...Go to contribution page
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Samuel Clark (University College London)20/06/2019, 18:14PosterLaser Additive Manufacturing (LAM) can directly produce near-net-shape metallic components using commercial alloy powders. However, primary solidification during LAM is far from equilibrium due to the ultra-fast laser-powder interaction (<50 ms), mixing of solutes during melting and micro-segregation upon rapid solidification. Our understanding of these phenomena and the resultant...Go to contribution page
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Aina Opsal Bakke (Norwegian University of Science and Technology)20/06/2019, 18:15PosterThis work focuses on bimetallic casting between A356 alloy melt and profiles of AA6xxx wrought aluminum alloys through a gravity casting process, with the aim to improve the component’s mechanical properties. However, combining two aluminum alloys is difficult due to the stable aluminum oxide present on the surface of the aluminum inserts and the advancing liquid melt front. The oxide layer...Go to contribution page
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Gonzalo Alvarez de Toledo (Sidenor I+D)20/06/2019, 18:17PosterDISTEMP solidification numerical model of the continuous casting steel has been a useful tool to explain billet surface and internal quality at Sidenor steel company. Work has been carried out along the years to adjust the appropriate heat transfer coefficients in the mould and secondary cooling to get a reliable description of the CC billet solidification. The numerical model has assisted to...Go to contribution page
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Qian Xu (Huazhong University)20/06/2019, 18:19PosterHot isostatic pressing(HIP) is an effective method to eliminate the shrinkage in castings. The morphology of shrinkage is complex, and there are structures such as sharp corners and small passages which would lead to a large number of elements and easily divergent calculation results. Therefore, the application of numerical simulation in HIP is limited. To solve the non-convergence problem,...Go to contribution page
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Jakob Six (voestalpine Stahl GmbH)20/06/2019, 18:21PosterDuring continuous casting of steel, the strand is exposed to severe thermal and mechanical stresses. These may trigger formation and growth of cracks, which deteriorate the slab properties. Particularly, at temperatures in the region of the second ductility trough, deformation can become critical. A low ductility level is often observed in a temperature range of 600°C to 1200°C, where the...Go to contribution page
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Dr Qiang Wang (Wuhan University of Science and Technology and Delft University of Technology)20/06/2019, 18:22PosterMing HE 1, 2, Xianliang LI 1, 3, Qingwei WANG1, 2, Qiang WANG 1, * 1 Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China 2 School of Metallurgy, Northeastern University, Shenyang 110819, China 3 School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China * Corresponding author:...Go to contribution page
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