Metal forming and foundry

The latest publications in this offer are:

• January 10, 2025

  M3665

  Foundry engineering

  This paper proposes a methodological approach proposal for the study and realization of a foundry plant. The chronological phases of the project are discussed here, from the choice of the foundry site to the first parts production. It reviews global plant studies, buildings, equipment, material flows, without forgetting personnel, energy, quality and environmental aspects. A methodology for calculating production needs is proposed: liquid metal, molds, cores and others, taking into account different losses or yields.

• November 10, 2024

  M3664

  Foundry engineering

  Foundry engineering is a wide subject due to the high diffusion of casting parts in all sectors of industry. The foundry business groups together a set of tasks from base metals melting through to finishing pieces and including molding and core-making operations. This article proposes a methodological approach for the study and realization of a new foundry plant from a defined commercial need until the establishment of the chosen production means; the approach can also be applied to an evolution of part of a foundry’s workshops. It also gives some technical descriptions of equipment needed all along the foundry process.

• November 10, 2024

  M3040 Review

  Texture and anisotropy of polycrystalline materials

  The short article gives a brief overview of the basics of Kikuchi diffraction, the experimental setup in TEM and SEM, and the preparation of the samples. The diffraction patterns allow to measure the orientation of grains, to study disorientations at grain boundaries, to distinguish different materials and to obtain information on the local perfection of crystals, with a spatial resolution of a few nanometers in transmission (TKD) and of the order of 10 nm in backscattering (BKD, EBSD).

• September 10, 2023

  M3011

  Metric and mesh

  This article gives the basics for finite element problems related to meshes. We are interested in the definition of a mesh. Thanks to the notion of metric, the geometric point of view is replaced by an algebraic and analytical point of view allowing to unify the notions of mesh, mesh adaptation and remeshing. In this new concept, a mesh is only a Riemannian space in which the metrics characterize the elements.

• February 10, 2023

  M3660

  Foundry controls

  This article deals with the general principles, methods and application of all the controls involved throughout the foundry process. These controls are a necessary step for the production of parts that comply with customer requirements and must be part of the quality approach of any foundry. The purpose here is to present the various defects visible in foundry, the methods of controls, batching and traceability of parts and their transposition into the customer specifications. Finally, the most common controls implemented on the material, foundry parts, as well as those concerning the foundry process, from receipt of raw materials to the finishing, will be described.

• January 10, 2023

  M3160

  Shaping titanium alloys

  Due to their excellent compromise between density, mechanical properties and corrosion resistance, titanium alloys are optimal candidates for many applications, particularly in the aeronautical and space areas. For these alloys, thermal and thermomechanical treatments are systematically used in order to optimize the performances and adapt the microstructure to the desired use. This article lists the fundamentals for the manufacture of semi-finished products and finished products by forging, rolling, extrusion, wire drawing and drawing, as well as state-of-the-art techniques such as superplastic bulging, powder metallurgy, casting and additive manufacturing.

• December 10, 2022

  M3325

  Manufacturing parts without machining: microPIM

  The development and industrialization of microsystems require the emergence of new techniques to go beyond processes that only use polymers or silicon. The microPIM process has a prominent place there. This technique is a hybridization between thermoplastic injection and pressing / sintering of powder metallurgy. This process has the great advantage of making it possible to obtain, at low cost, ceramic or metal multi-material components, directly net-shape, without re-machining, exhibiting a complex shape. There are many applications for this new shaping process, especially in the automotive industry, household appliances, electronics, watchmaking and the pharmaceutical industry.

• November 16, 2022

  M3007 Review

  Analysis of forming processes

  This article presents the elementary energetic methods for obtaining approximate solutions of the metal plasticity equations: the approximate energy balance based on the uniform deformation assumption and the methods by building velocity fields: the upper bound method and its various extensions. One applies them to the analysis of metal forming operations and mechanical tests. Generally the metal is assumed rigid perfectly plastic (RPP) and it verifies the von Mises yield criterion. The tools are rigid and impose a Tresca's friction law.

• November 10, 2022

  M3580

  Investment casting

  This article discusses the characteristics of precision lost-wax casting for one of its most modern applications, turbojet blades. This type of casting is well suited to metallic materials having high-heat mechanical characteristics such as nickel-based and cobalt-based alloys, used in turbomachinery. In addition, the lost-wax casting model makes it possible to obtain reduced dimensional tolerances and high-quality surfaces at significantly lower manufacturing costs than by any other machining technique, traditional or not.

• July 10, 2022

  M3683

  Foundry environment

  Corporate social responsibility is part of a political context with a view to generalizing and applying the principles of sustainable development in companies. RSE is the approach by which a foundry takes into account the aspects of sustainable development linked to its activity in its strategy and operation, to strengthen its overall performance and be competitive. This article presents the notions of sustainable development and social responsibility with their declination in the strategy of foundries by means of environmental management according to a site or 'product' approach but also with the occupational health and safety component.

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