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Chris Gourlay (Imperial College London)20/06/2019, 13:30KeynoteAl-Mn-Fe intermetallics are important for the corrosion resistance of cast Mg alloys but there have been few studies on their solidification mechanisms or microstructure development. Here EBSD, deep etching and FIB-tomography are combined to study the nucleation and equaixed growth crystallography of B2-Al(Mn,Fe), Al8Mn5, and Al11Mn4 in Mg-Al-Mn-based alloys. It is shown that twinning readily...Go to contribution page
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Shouxun Ji (Brunel University London)20/06/2019, 14:00Oral PresentationIn aluminium alloys, iron is a common impurity as it is unavoidably picked up in practice. The excessive Fe is strongly prone to form various intermetallic phases. These Fe-rich intermetallics are generally brittle and act as stress raisers to weaken the coherence with Al matrix, therefore decreasing elongation. However, Fe addition in Al-Mg alloys may be beneficial because of the...Go to contribution page
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Hani Henein (University of Alberta)20/06/2019, 14:20Oral PresentationThis paper reports on the development of Solidification Continuous Cooling Transformation diagrams that relate the solidification paths to the inherent microstructures of binary and ternary alloys. The methodology is based on the quantification of a solidified microstructure for its various phase fractions. This measured data is combined with well-established solidification models and phase...Go to contribution page
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Raphaël MARIN (Institut Jean Lamour)20/06/2019, 14:40Oral PresentationThe solidification path and the σ-phase precipitation mechanism of UNS S31254 alloy were studied on the basis of directional solidified experiments accompanied by scanning electron microscopy observations and energy dispersive X-ray a nalysis. The resulting temperatures of solidification paths and phase transformation were compared with Gulliver-Scheil and equilibrium calculations predicted...Go to contribution page
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Esra Erdem Hornauer (SMS group GmbH)20/06/2019, 15:00Oral PresentationThis study aims in combining the material properties and numerical modelling techniques through practical application to provide understanding of surface edge cracking caused by V(C,N) precipitation to enhance the yield of the continuous bloom caster at ArcelorMittal Duisburg. The investigation for this work is carried out on three different micro-alloyed steel grades; one of them being the...Go to contribution page
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Yan Huang (BCAST, Brunel University London)20/06/2019, 15:20Oral PresentationMetal matrix composites (MMCs) can be tailored to produce various combinations of stiffness and strength and have found a wide range of applications where existing materials are not suitable for use in automotive and aerospace industries and many other areas. Stir casting is commonly used for fabricating large quantity of primary MMCs, in comparison to liquid metal infiltration and powder...Go to contribution page
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Qiang Du (SINTEF)20/06/2019, 16:10Oral PresentationThe formation of coarse Fe and Mn containing intermetallic particles during the DC casting of Al-Mn-Ti-Fe-Si alloys is detrimental to the alloys' cracking susceptibility, formability and even final mechanical/corrosion properties. In this talk, SEM/TEM are employed to reveal the microstructural features of the particles including composition, size distributions and morphologies. These...Go to contribution page
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Hongwei Zhang (1Northeastern University, Key Laboratory of Electromagnetic Processing of Materials, Shenyang, 110004, P.R. China 2 Northeastern University, School of Metallurgy, Shenyang, 110004, P.R. China)20/06/2019, 16:30Oral PresentationThe carbide precipitation nature of an automobile gear material, i.e. Fe-C-Mn-Si-Cr-Mo alloy, during carburization and element addition process are investigated through PE+PA+LR prediction. Results show that, carburization process greatly increases the amount of cementite as well as the hardness index at the surface part. Besides, the addition of Ti and V helps to formation of TiC and (V,Mo)C...Go to contribution page
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Kou Hongchao (Northwestern Polytechnical University)20/06/2019, 16:50Oral Presentationγ-TiAl alloys are regarded as promising candidates in aero and automobile industry due to their superior properties including low density, high specific strength, excellent oxidation resistance and creep strength. However, the application of these alloys is limited by the problems such as micro-segregations, inhomogeneous microstructure, texture and severe cracking tendency. In the article,...Go to contribution page
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Ralf Berger (Access e.V.)20/06/2019, 17:10Oral PresentationThe current work, describes a numerical methodology to obtain deeper understanding of the kinetics of solidification and the dynamics of Al melt infiltration into porous iron preforms, in order to develop a near net shape process for a new class of highly advanced ductile and fine grained Fe-Al intermetallic. Investigations on macroscale simulations revealed that certain pressure and wetting...Go to contribution page
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