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At present, the manufacturing industry is focused on the production of lighter weight components with better mechanical properties and always fulfilling all the environmental requirements. These challenges have caused a need for developing manufacturing processes in general, including obviously those devoted in particular to the development of thin-walled metallic shapes, as is the case with tubular and sheet metal parts and devices.This Special Issue is thus devoted to research in the fields of sheet metal forming and tube forming, and their applications, including both experimental and numerical approaches and using a variety of scientific and technological tools, such as forming limit diagrams (FLDs), analysis on formability and failure, strain analysis based on circle grids or digital image correlation (DIC), and finite element analysis (FEA), among others.In this context, we are pleased to present this Special Issue dealing with recent studies in the field of tube and sheet metal forming processes and their main applications within different high-tech industries, such as the aerospace, automotive, or medical sectors, among others.

micro tube --- hollow sinking --- plastic anisotropy --- surface quality --- size effect --- plasticity --- strength --- metallic tubes --- finite element analysis --- accumulative extrusion bonding --- kinematic bending --- product properties --- local heating --- profile bending --- asymmetric profile --- warping --- superimposed hydrostatic pressure --- shear damage growth --- fracture strain --- finite element analysis (FEA) --- additive manufacturing --- rapid prototyping --- sheet metal forming --- V-bending --- groove pressing --- HA-SPIF --- surface finish --- machine learning --- Ti6Al4V --- R-value --- thickness strain --- digital image correlation --- multi-camera DIC --- non-destructive testing --- single point incremental forming --- tube expansion --- formability --- fracture --- stress-triaxiality --- strain-hardening --- viscoplasticity --- bending --- semi-analytic solution --- Ti-6Al-4V ELI --- superplastic forming --- custom prosthesis --- in vivo tests --- n/a --- Technology --- Engineering --- History.

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The plastic forming of metallic materials is the most efficient and an important manufacturing technology in today's industry. Lightweight materials, such as titanium alloys, aluminum alloys, and ultra-high-strength steels, are used extensively in the automotive, aerospace, transportation, and construction industries, leading to increased demand for advanced innovative forming technologies. Today, numeric simulations are highly focused and provide a better understanding of the innovative forming processes. Computational methods and numerical analysis coupled with the modelling of the structural evolution allow us to reduce time costs and eliminate experimental tests. The subjects of research articles published in this nook are multidisciplinary, including friction and lubrication in sheet metal forming, hot strip rolling and tandem strip rolling, application of numeric methods to simulate metal forming processes, development of new creep performance materials, the single point incremental forming process, and the fatigue fracture characteristics of Alclad 7075-T6 aluminum alloy sheets joined by refill friction stir spot welding. Review articles summarize the approaches on the innovative numerical algorithms, experimental methods, and theoretical contributions that have recently been proposed for sheet metal forming by researchers and business research centers.

History of engineering & technology --- electromagnetically assisted forming --- springback control --- numerical simulation --- modified 9Cr-2W steel --- B content --- phase transformation --- texture --- heat treatment --- coefficient of friction --- deep drawing --- draw bead --- material properties --- sheet metal forming --- surface properties --- drawbead --- FEM --- friction --- numerical modeling --- mechanical engineering --- stamping process --- bending under tension --- friction testing --- strip drawing --- tribology --- tandem skew rolling --- seamless tube --- magnesium alloy --- deformation behavior --- high strength steel --- asymmetric rolling --- aluminum alloy --- planar anisotropy --- mechanical properties --- microstructures --- truncated cone --- incremental sheet forming --- SPIF --- bending under tension test --- BUT --- aircraft industry --- aluminium alloy --- friction stir spot welding --- single-lap joints --- bending force prediction --- hot strip rolling (HSR) --- comparative assessment --- machine learning --- regression --- electromagnetic forming --- finite element method --- flexible-die forming --- flow-forming --- metal forming --- plastic working --- solid granular medium forming --- spinning --- warm forming --- electromagnetically assisted forming --- springback control --- numerical simulation --- modified 9Cr-2W steel --- B content --- phase transformation --- texture --- heat treatment --- coefficient of friction --- deep drawing --- draw bead --- material properties --- sheet metal forming --- surface properties --- drawbead --- FEM --- friction --- numerical modeling --- mechanical engineering --- stamping process --- bending under tension --- friction testing --- strip drawing --- tribology --- tandem skew rolling --- seamless tube --- magnesium alloy --- deformation behavior --- high strength steel --- asymmetric rolling --- aluminum alloy --- planar anisotropy --- mechanical properties --- microstructures --- truncated cone --- incremental sheet forming --- SPIF --- bending under tension test --- BUT --- aircraft industry --- aluminium alloy --- friction stir spot welding --- single-lap joints --- bending force prediction --- hot strip rolling (HSR) --- comparative assessment --- machine learning --- regression --- electromagnetic forming --- finite element method --- flexible-die forming --- flow-forming --- metal forming --- plastic working --- solid granular medium forming --- spinning --- warm forming

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The numerical simulation of sheet metal forming processes has become an indispensable tool for the design of components and their forming processes. This role was attained due to the huge impact in reducing time to market and the cost of developing new components in industries ranging from automotive to packing, as well as enabling an improved understanding of the deformation mechanisms and their interaction with process parameters. Despite being a consolidated tool, its potential for application continues to be discovered with the continuous need to simulate more complex processes, including the integration of the various processes involved in the production of a sheet metal component and the analysis of in-service behavior. The quest for more robust and sustainable processes has also changed its deterministic character into stochastic to be able to consider the scatter in mechanical properties induced by previous manufacturing processes. Faced with these challenges, this Special Issue presents scientific advances in the development of numerical tools that improve the prediction results for conventional forming process, enable the development of new forming processes, or contribute to the integration of several manufacturing processes, highlighting the growing multidisciplinary characteristic of this field.

n/a --- hardening --- modeling --- direct forming --- forming limit curve --- depth-sensing indentation --- stamping --- finite element method --- similitude --- the bathtub model --- boron steel --- plastic anisotropy --- physical experiment --- robustness evaluation --- cold deep drawing --- hardening law --- formability --- magnetic-pulse forming --- hot deep drawing --- metallic bipolar plate --- parameters identification --- finite element simulation --- mechanical properties --- hardness --- deformation characteristics --- continuum damage mechanics --- yield function --- Knoop indenter --- Young’s modulus --- damage --- 3D adaptive remeshing --- springback --- bake hardening --- Johnson–Cook material model --- anisotropy --- indirect forming --- ductile damage --- steel sheet --- mechanical modeling --- fracture behavior --- fuel cells --- dent resistance --- numerical simulation --- mixed hardening --- M-K theory --- uniform deformation --- non-proportional loading paths --- high-frequency oscillation --- gas detonation forming --- yield locus --- sheet metal forming --- inhomogeneity --- TA32 titanium alloy --- aluminium alloy formability --- Young's modulus --- Johnson-Cook material model

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At present, the manufacturing industry is focused on the production of lighter weight components with better mechanical properties and always fulfilling all the environmental requirements. These challenges have caused a need for developing manufacturing processes in general, including obviously those devoted in particular to the development of thin-walled metallic shapes, as is the case with tubular and sheet metal parts and devices.This Special Issue is thus devoted to research in the fields of sheet metal forming and tube forming, and their applications, including both experimental and numerical approaches and using a variety of scientific and technological tools, such as forming limit diagrams (FLDs), analysis on formability and failure, strain analysis based on circle grids or digital image correlation (DIC), and finite element analysis (FEA), among others.In this context, we are pleased to present this Special Issue dealing with recent studies in the field of tube and sheet metal forming processes and their main applications within different high-tech industries, such as the aerospace, automotive, or medical sectors, among others.

Technology: general issues --- History of engineering & technology --- micro tube --- hollow sinking --- plastic anisotropy --- surface quality --- size effect --- plasticity --- strength --- metallic tubes --- finite element analysis --- accumulative extrusion bonding --- kinematic bending --- product properties --- local heating --- profile bending --- asymmetric profile --- warping --- superimposed hydrostatic pressure --- shear damage growth --- fracture strain --- finite element analysis (FEA) --- additive manufacturing --- rapid prototyping --- sheet metal forming --- V-bending --- groove pressing --- HA-SPIF --- surface finish --- machine learning --- Ti6Al4V --- R-value --- thickness strain --- digital image correlation --- multi-camera DIC --- non-destructive testing --- single point incremental forming --- tube expansion --- formability --- fracture --- stress-triaxiality --- strain-hardening --- viscoplasticity --- bending --- semi-analytic solution --- Ti-6Al-4V ELI --- superplastic forming --- custom prosthesis --- in vivo tests --- n/a --- Technology --- Engineering --- History.

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The miniaturization of industrial products is a global trend. Metal forming technology is not only suitable for mass production and excellent in productivity and cost reduction, but it is also a key processing method that is essential for products that utilize advantage of the mechanical and functional properties of metals. However, it is not easy to realize the processing even if the conventional metal forming technology is directly scaled down. This is because the characteristics of materials, processing methods, die and tools, etc., vary greatly with miniaturization. In metal micro forming technology, the size effect of major issues for micro forming have also been clarified academically. New processing methods for metal micro forming have also been developed by introducing new special processing techniques, and it is a new wave of innovation toward high precision, high degree of processing, and high flexibility. To date, several special issues and books have been published on micro-forming technology. This book contains 11 of the latest research results on metal micro forming technology. The editor believes that it will be very useful for understanding the state-of-the-art of metal micro forming technology and for understanding future trends.

History of engineering & technology --- laser impact liquid flexible embossing --- microforming --- 3-D large area micro arrays --- liquid shock wave --- high strain rate forming --- numerical simulation --- carbon nanotubes --- feedstock --- homogeneity --- metallic powders --- micro hot embossing --- shaping --- plasma printing --- micro-texturing --- screen printing --- low-temperature plasma nitriding --- selective anisotropic nitrogen embedding --- selective hardening --- sand blasting --- AISI316 --- micro-meshing punch array --- copper plates --- resistance heating system --- surface modification --- free surface roughness evolution --- compression --- thin sheet metal --- micro metal forming --- ultrasonic --- orbital forming --- micro-tubes --- micro-tube drawing --- micro-hydroforming --- laser assisted --- severe plastic deformation --- micro-tube testing --- dieless drawing --- SUS304 stainless steel wires --- oxide layer --- finite element simulation --- surface texturing --- sheet metal forming --- in-situ observation --- micro-dimple --- lubricant --- microtube --- hydroforming --- T-shape bulging --- tube materials --- friction --- tube length --- micro hydroformability --- process window --- FE analysis --- microstructure --- size effects --- deformation characterization --- micro-rolling --- wire --- n/a