Full Review of Additive Layer Manufacturing (ALM) of metallic parts

Download or read book Full Review of Additive Layer Manufacturing (ALM) of metallic parts written by Khalil Refai and published by KHALIL REFAI. This book was released on with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Send me an email at [email protected] to receive the articles cited in this manuscript. This manuscript presents the exciting new technology of additive layer manufacturing (ALM) of metal objects for a broad audience of academic and industry researchers, manufacturing professionals, undergraduate and graduate students, hobbyists, and artists. Innovative applications ranging from rocket nozzles to medical implants illustrate a new world of freedom in design and fabrication, creating objects otherwise not possible by conventional means. New questions naturally arise when using ALM for structural parts. For example, what is the surface quality of the obtained structures? How is it possible to control material defects? How does the microstructure affect the macroscopic mechanical properties? What are the optimal machine parameters for producing components by ALM? At which phase of the design should optimization take place to fully exploit the potential of ALM? Answering these questions is a key point in order to reduce the gap between the requirements set by the technical specifications and the produced part. Therefore, it seems obvious that the industrialization of the ALM process involves the development of mathematical models and algorithms capable of integrating the specificity of the manufacturing process as well as the associated physical phenomena from the first (preliminary) stage. The author presents a bibliographical summary of the various aspects of Additive Manufacturing (AM). Generalities on AM techniques and Ti-6Al-4V obtained by SLM are presented. Then, the mechanical and fatigue behaviours of SLM Ti-6Al-4V structures is analyzed. The sensitivity to different parameters such as HIP post-processing, surface roughness and porosities is discussed.