-
Peter Lee (University College London)20/06/2019, 10:30HighlightSolidification phenomena during laser additive manufacturing (LAM) occur under rapid solidification conditions, with the entire melting and solidification process occurring in a few milli-seconds. New characterisation techniques are required to capture the powder-melting, weld pool formation, together with the subsequent solidification phenomena including defect formation. To enable this, a...Go to contribution page
-
Mr Adam Allen (Department of Engineering, University of Leicester)20/06/2019, 10:50Oral PresentationNiobium silicide-based composites, in the application of gas turbine blades, promise significant efficiency improvements compared to current Ni-based alloys. The higher temperature capability would allow the engine to run at a higher temperature than that of current alloys, increasing engine efficiency. Nb-Si based composites possess a lower density, due to the presence of ceramic phases such...Go to contribution page
-
Abhishek G.S. (Indian Institute of Technology Bombay, Mumbai, India - 400076)20/06/2019, 11:10Oral PresentationRecently, Additive manufacturing (AM) has emerged as a disruptive technology to manufacture complex parts with greater scales of economy and also with a reduced need for post-machining. However, the influence of processing conditions and the alloy compositions on the strength, defect formation are not yet fully understood. A quantitative simulation of the microstructure morphologies and...Go to contribution page
-
Yuze Li (Institut Jean Lamour, CNRS, IRT M2P)20/06/2019, 11:30Oral PresentationA set of single track laser melting experiments was performed in a selective laser melting (SLM). The tracks were done on an Inconel 718 plate with various laser scan velocities at a constant laser power of 150 W. The geometries of the molten pool (MP), as well as the solidified dendrite structures, i.e., primary and secondary dendrite arm spacing (PDAS and SDAS), in the cross sections of...Go to contribution page
-
Jiang Wang (State Key Laboratory of Advanced Special Steel & Shanghai University)20/06/2019, 11:50Oral PresentationAdditive manufacturing has been regarded as a highly potential method to produce metallic parts with complex geometry. Its basic process in fact is laser melting and the fast solidification afterward. Controlling such process or tailoring the solidification structure of the metallic samples fabricated via additive manufacturing is therefore the control of that fast solidification process. This...Go to contribution page
-
Yancheng ZHANG (CEMEF - Centre de Mise En Forme de Matériaux, MINES ParisTech, France)20/06/2019, 13:30KeynoteA thermo-mechanical model of powder bed fusion by laser beam is developed by the finite element method at the macro-scale. This approach focuses on the part construction, in which a level-set framework is adopted to track first the interface between the constructed part and the non-exposed powder, and second, the interface between gas and the successive powder bed layers. The accounting for...Go to contribution page
-
Alexis Queva (CEMEF - Mines ParisTech)20/06/2019, 14:00Oral PresentationInterest has recently emerged for the manufacture of aeronautical parts by Laser Beam Melting (LBM) additive process. This energy efficient process can for instance be used to build complex geometries, which cannot be made with traditional processes. However, complex phenomena occur during powder melting and track development : vaporisation phenomena influence laser-matter interaction by creating...Go to contribution page
-
Arvind Kumar (Indian Institute of Technology Kanpur)20/06/2019, 14:20Oral PresentationSelective Laser Melting (SLM), the most popular metal additive manufacturing (AM) process, is well suited for making complicated parts which are difficult to manufacture by conventional manufacturing techniques. Currently, the main bottlenecks inhibiting the usage of the Selective Laser Melting (SLM) parts include the problems, such as porosity, low resolution, low surface finish quality and...Go to contribution page
-
David Browne (University College Dublin)20/06/2019, 14:40Oral PresentationPowder bed fusion processes in additive manufacture (AM) of metals typically involve solidification in high thermal gradients, leading to unwanted anisotropic columnar growth and high residual stress in as-printed components. Equiaxed solidification can alleviate such problems but is difficult to achieve due to the thermal fields naturally evolving in typical AM processes. Pre-heating of the...Go to contribution page
-
Wang Zheng (School of Materials Science and Engineering, Tsinghua University)20/06/2019, 15:00Oral PresentationUnderstanding the dynamic evolution of primary dendritic spacing in the laser melt pool is significant from a technological viewpoint because primary spacing is one of the foremost parameters that control the final mechanical properties of additive manufactured products. In this work, a multi-scale computational framework that couples FEM and a developed quantitative phase field method is...Go to contribution page
-
Junjie Li (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University)20/06/2019, 15:20Oral PresentationLaser metal deposition is an additive manufacturing technique for fabricating complex metal components layer by layer. The complex thermal behavior during this process results in the complex microstructure evolution, which directly affects the final mechanical properties of the products. Numerical modeling offers a cost efficient way to better understand the related complex physics in laser...Go to contribution page
Choose timezone
Your profile timezone: