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The use of lightweight structures across several industries has become inevitable in today’s world given the ever-rising demand for improved fuel economy and resource efficiency. In the automotive industry, composites, reinforced plastics, and lightweight materials, such as aluminum and magnesium are being adopted by many OEMs at increasing rates to reduce vehicle mass and develop efficient new lightweight designs. Automotive weight reduction with high-strength steel is also witnessing major ongoing efforts to design novel damage-controlled forming processes for a new generation of efficient, lightweight steel components. Although great progress has been made over the past decades in understanding the thermomechanical behavior of these materials, their extensive use as lightweight solutions is still limited due to numerous challenges that play a key role in cost competitiveness. Hence, significant research efforts are still required to fully understand the anisotropic material behavior, failure mechanisms, and, most importantly, the interplay between industrial processing, microstructure development, and the resulting properties. This Special Issue reprint book features concise reports on the current status in the field. The topics discussed herein include areas of manufacturing and processing technologies of materials for lightweight applications, innovative microstructure and process design concepts, and advanced characterization techniques combined with modeling of material’s behavior.

n/a --- microstructure --- Mg-Al-Ba-Ca alloy --- strength --- severe plastic deformation --- hot working --- surface roughness --- high pressure torsion extrusion --- optimization --- fatigue fracture behavior --- magnesium alloys --- de-coring --- formability --- multilayered sheets --- HPDC --- spring-back --- contact heat transfer --- mechanical properties --- bending --- in-die quenching --- equivalent strain --- light metals --- processing --- heat transfer --- damage --- creep aging --- thin-walled profile --- rolling --- aluminum alloy --- transmission line fittings --- ceramic core --- processing map --- automated void recognition --- FEA --- multi-output porthole extrusion --- density --- kinetic analysis --- texture --- non-ferrous alloys --- material characterization --- stress superposition --- hot stamping --- metal flow --- hybrid composite material --- V-bending test --- finite element model --- aluminium alloy --- shear lap test --- Al-Cu-Mg alloy --- characterization

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The development of modern numerical methods has led to significant advances in the field of fatigue and fracture, which are pivotal issues in structural integrity. Because of the permanent tendency to shorten time-to-market periods and the development cost, the use of the finite element method, extended finite element method, peridynamics, or meshless methods, among others, has represented a viable alternative to experimental methods. This Special Issue aims to focus on the new trends in computational methods to address fatigue and fracture problems. Research on innovative and successful industrial applications as well as on nonconventional numerical approaches is also addressed.

Technology: general issues --- History of engineering & technology --- finite element method --- Taguchi method --- tooth surface contact stress --- tooth profile deviations --- meshing errors --- lead crowning modifications --- critical load --- fracture --- tubular cantilever beam --- U-notch --- theory of critical distances --- LEFM --- mesh density --- mixed mode stress intensity factors --- fatigue crack growth --- FEM --- fatigue failure --- design flaws --- mechanical system --- parametric ALT --- hinge kit system --- XFEM --- ANSYS mechanical --- smart crack growth --- stress intensity factors --- fatigue life prediction --- gears --- Single Tooth Bending Fatigue --- STBF --- Finite Element Model --- material characterization --- multiaxial fatigue --- critical plane --- metal casting --- mold design --- simulation --- optimization --- fatigue life --- reliability --- n/a

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The Special Issue Machining—Recent Advances, Applications and Challenges is intended as a humble collection of some of the hottest topics in machining. The manufacturing industry is a varying and challenging environment where new advances emerge from one day to another. In recent years, new manufacturing procedures have retained increasing attention from the industrial and scientific community. However, machining still remains the key operation to achieve high productivity and precision for high-added value parts. Continuous research is performed, and new ideas are constantly considered. This Special Issue summarizes selected high-quality papers which were submitted, peer-reviewed, and recommended by experts. It covers some (but not only) of the following topics: High performance operations for difficult-to-cut alloys, wrought and cast materials, light alloys, ceramics, etc.; Cutting tools, grades, substrates and coatings. Wear damage; Advanced cooling in machining: Minimum quantity of lubricant, dry or cryogenics; Modelling, focused on the reduction of risks, the process outcome, and to maintain surface integrity; Vibration problems in machines: Active and passive/predictive methods, sources, diagnosis and avoidance; Influence of machining in new concepts of machine–tool, and machine static and dynamic behaviors; Machinability of new composites, brittle and emerging materials; Assisted machining processes by high-pressure, laser, US, and others; Introduction of new analytics and decision making into machining programming. We wish to thank the reviewers and staff from Materials for their comments, advice, suggestions and invaluable support during the development of this Special Issue.

in situ estimation --- modeling --- simulation --- variable pitch --- X-ray diffraction --- cutting edge preparation --- plastic zone --- flank milling --- surface roughness --- power consumption --- cutting tool --- fatigue --- additive manufacturing --- optimization --- trochoidal step --- surface topography --- sinusoidal grid --- milling --- desirability approach --- electrochemical discharge machining --- fast simulation --- Inconel 718 --- secondary adhesion wear --- machinability --- hybrid stacks drilling --- cooling rate --- shape memory alloy --- residual stress --- diameter variation --- turning --- computer vision --- workholding --- on-machine monitoring --- chip morphology --- dry-cutting --- turning machine tools --- SACE-drilled hole depth --- residual stresses --- cryogenic machining --- prime machining costs --- PVD Ti0.41Al0.59N/Ti0.55Al0.45N coating --- single point incremental sheet forming --- butt weld joint --- dish angle --- machining characteristic --- DSC test --- segmented diamond blade --- cutting tool wear --- ultra-precision machining --- ceramics --- shape memory effect --- current density --- fractal dimension --- crack growth rate --- drilling --- force–temperature correlation through analytical modeling --- finite element model --- analytic solution --- aluminium --- taguchi method --- multi-objective optimization --- real-time prediction --- Gamma-TiAl --- cutting temperature --- EN 31 steel --- superalloys --- material-removal rate --- glass machining --- corner radius --- thin-wall machining --- vibration --- GPU --- titanium aluminides --- minimum quantity lubrication --- machining temperatures at two deformation zones --- finite element method --- roughness --- slight materials --- high computational efficiency --- dynamic --- adhesive --- heat transfer analysis --- connections --- stability --- vibrations --- trochoidal milling --- magnesium alloys --- specific cutting energy --- laser-assisted machining --- artificial neutral network --- microscopic analysis --- Milling stability --- topography --- weight loss --- modal testing --- sustainable machining --- dry --- damping --- ductile machining --- Inconel® 718 --- modelling --- cutting edge microgeometry --- electropulsing --- PCD --- cutting geometry --- fixture --- artificial neural networks --- spark-assisted chemical engraving --- machining --- specific energy consumption --- heat transfer search algorithm --- material removal rate --- prediction --- CFRP/UNS A92024 --- tool wear --- titanium alloy --- multi-beam laser --- chip compression ratio --- design of experiments --- concrete --- ANN --- titanium --- chatter --- response surface methodology --- machine tool --- superelastic nitinol --- optimal machining conditions --- machine vision --- steel sheet --- cutting process --- fracture mechanism --- self-excitation --- tool insert condition --- induction assisted milling --- hole quality --- GA --- titanium alloys --- microlens array --- parameter identification --- Taguchi method --- weld reinforcement --- slow tool servo --- cutting parameters --- flank super abrasive machining (SAM) --- stiffness properties --- grey relational analysis --- deflection --- computer numerical control --- grain density --- surface grinding --- the cutting force components --- Huber–Mises stress --- WEDM