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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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Welding is widely used by both academia and industry to create similar and dissimilar joints aiming to create a complex shape structure and to couple the mechanical properties of different materials into a single monolithic structure. In this book, a collection of peer-reviewed works on the welding of advanced engineering alloys is presented. Both solid-state and fusion-based welding technologies are presented. These works employed advanced microstructure characterization to evaluate how the selection of process parameters impacts the microstructure and mechanical properties of the welded joints. Moreover, three comprehensive review works are also included, providing an in-depth overview of distinct topics. We hope that this collection of works is of interest to the community so that welding technologies continue to grow further in the future.

Technology: general issues --- History of engineering & technology --- friction stir welding --- dissimilar metals --- temperature --- process conditions --- guidelines --- resistance heat-assisted ultrasonic welding --- mechanical properties --- fracture morphology --- intermetallic compounds --- microstructure --- double-pulsed --- robot operation --- fuzzy comprehensive evaluation --- orthogonal experimental design --- short-circuiting gas metal arc welding --- waveform control method --- weld pool oscillation and flow --- high speed photograph --- image processing --- continuous wavelet transform --- K-TIG --- heat input --- weld formation --- tensile properties --- welding procedure optimisation --- tungsten inert gas welding --- friction stir processing --- dissimilar aluminium alloys joints --- dissimilar metal joints --- welding --- high entropy alloys --- laser welding --- review --- tensile strength --- flexural strength --- dissimilar aluminium alloys --- numerical finite-element modeling --- analytical Rosenthal equation --- thermal regime --- AA5456 --- aluminum alloy --- fiber laser-MIG hybrid --- CMT --- MIG --- hybrid joints --- hardness --- ASTM A553-1 (9% nickel steel) --- penetration shape --- Bead on Plate (BOP) --- pulsed GMAW --- droplet transfer --- weld bead formation --- droplet impact force --- double-pulsed gas metal arc welding (DP-GMAW) --- droplet impingement pressure --- weld pool oscillation --- grain refinement --- constitutional supercooling --- deep neural network --- high strength steel --- laser beam welding --- penetration --- quality assessment --- spectrometer --- welding seam root --- metal flow behavior --- root flaw --- pin length --- Incomplete penetration --- weak connection --- real time --- infrared thermography --- camera --- microhardness --- plasma arc welding --- hot wire --- laser oscillating welding --- high temperature titanium alloy --- laser impact welding --- interfacial bonding mechanism --- interface wave --- diffusion --- TA1/Q235B composite sheets --- rolling temperature --- explosive welding --- microstructures --- dissimilar welding --- aluminum --- fracture --- friction welding --- Ti-6Al-4V --- nitinol --- intermetallic compound --- fractography --- dissimilar metal joining --- dissimilar friction stir welding --- AA2024-T4/AA7075-T6Al alloys --- t-butt joints --- microstructure evaluation --- EBSD --- fracture surfaces --- texture --- investment casting --- alloy 718 --- hot cracking mechanism --- Varestraint test