What is Wire Arc Additive Manufacture?3 answersWire Arc Additive Manufacturing (WAAM) is a method of additive manufacturing that involves using wire and an electric arc to deposit weld material layer by layer. WAAM has gained attention due to its advantages such as high material utilization, high molding efficiency, low equipment cost, and the ability to produce unlimited size of molded parts ^[Cao et al.]. It is a cost-effective process that utilizes off-the-shelf welding equipment attached to a motion controller, such as a robotic arm or gantry, to deposit weld material accurately and consistently ^[Venkatesh Prajna]. WAAM has been found to have comparable mechanical qualities to cast material and offers cost savings and higher deposition rates compared to other fusion sources ^[Kumar et al.]. However, WAAM also presents challenges such as undesired microstructures, mechanical characteristics, residual stresses, and deformation, which require further research to optimize process parameters and post-deposition heat treatment ^[Kumar et al.].
What are the benefits of additive manufacturing?5 answersAdditive manufacturing, also known as 3D printing, offers several benefits. It allows for the creation of parts with complex geometries, which is not easily achievable with conventional manufacturing techniques. The technology enables the production of customized, small volume parts in a short time, making it suitable for rapid prototyping and low-volume production. Additionally, additive manufacturing reduces the need for expensive tooling, resulting in cost savings. It also offers design freedom and the ability to build complicated assemblies, allowing for bulk customization and unwanted minimization. Furthermore, additive manufacturing has found applications in various industries, including aircraft construction, due to its alignment with the industry's requirements. Overall, additive manufacturing provides advantages such as increased design flexibility, reduced manufacturing time, cost savings, and the ability to produce complex parts.
What are the latest research findings on the development of high strength alloys using additive manufacturing?5 answersRecent research has focused on the development of high-strength alloys using additive manufacturing. One approach involves the addition of solute to titanium (Ti) and Ti-based alloys to produce equiaxed microstructures. The selection of alloying additions and the minimum amounts required for the columnar to equiaxed microstructural transition can be guided by computational schemes. Another study achieved the additive manufacturing of a dissimilar functionally graded joint of Ti–6Al–4V and Inconel 718 alloy by employing V, Cr, and Ni multi-interlayers. This approach mitigated the limitations of brittle intermetallic compound (IMC) formation and microcracks, resulting in a robust joint with improved tensile strength and hardness. In-situ alloying of blended elemental powders via laser directed energy deposition (DED) was used to fabricate a high-strength lamellar high-entropy alloy (HEA) with excellent ductility. The DED-processed HEA exhibited a lamellar structure with alternating molten pools and heat affected zones, providing outstanding mechanical properties for structural applications. Additionally, the additive manufacturing of titanium alloys through laser melting deposition with the addition of multi-element Fe–Cr–Ni–Mo resulted in enhanced strength and uniform ductility. The localized homogenization of CP-Ti and 316L alloy melts produced a microstructure that improved the mechanical properties of the alloy. Finally, friction screw extrusion additive manufacturing (FSEAM) was used to deposit thin layers of AA6060T6 aluminum alloy, resulting in solid walls with promising mechanical properties and a fine microstructure. Further optimization of the FSEAM process is needed for additive manufacturing of aluminum alloys.
What are the latest developments in additive manufacturing?5 answersAdditive manufacturing, also known as 3D printing, has seen several recent developments. One area of focus is the 3D printing of polymer composites with conductive properties, which involves using different conductive fillers. Another area of advancement is in the three most commonly used additive manufacturing technologies with polymeric materials: material extrusion, vat photopolymerization, and powder bed fusion. Additionally, additive manufacturing has been applied in various sectors, including tissue engineering, where it has been used to make biomaterials, organs, and drugs. In the field of nuclear reactors, additive manufacturing techniques have been explored, with a focus on material properties, experiments, numerical simulations, and standards. Finally, additive manufacturing has played a significant role in fabricating orthopedic implants, particularly hip implants, using biomaterials.
What is the definition of additive manufacturing?5 answersAdditive manufacturing is the process of manufacturing parts by depositing materials layer by layer. It is a unique method of fabricating objects compared to other commonly-used fabrication techniques.
What is additive manufacturing?4 answersAdditive manufacturing is a unique process where materials are added layer by layer to create a three-dimensional object. It is controlled by computer-aided design and is used in various industries such as aerospace, automobile, consumer products, and biomedical and food industries. This manufacturing technique is based on digital solid models and is entirely computer-controlled. Additive manufacturing has been used for low production runs of parts with complex shapes and geometric features, as well as for topology optimization. It has immense engineering and scientific importance and is considered the technique of the future. Additive manufacturing technologies have contributed to a wide range of industrial applications, with different processes and materials being used for specific applications.