A Review of Additive Manufacturing

Abstract

Additive manufacturing processes take the information from a computer-aided design (CAD) file that is later converted to a stereolithography (STL) file. In this process, the drawing made in the CAD software is approximated by triangles and sliced containing the information of each layer that is going to be printed. There is a discussion of the relevant additive manufacturing processes and their applications. The aerospace industry employs them because of the possibility of manufacturing lighter structures to reduce weight. Additive manufacturing is transforming the practice of medicine and making work easier for architects. In 2004, the Society of Manufacturing Engineers did a classification of the various technologies and there are at least four additional significant technologies in 2012. Studies are reviewed which were about the strength of products made in additive manufacturing processes. However, there is still a lot of work and research to be accomplished before additive manufacturing technologies become standard in the manufacturing industry because not every commonly used manufacturing material can be handled. The accuracy needs improvement to eliminate the necessity of a finishing process. The continuous and increasing growth experienced since the early days and the successful results up to the present time allow for optimism that additive manufacturing has a significant place in the future of manufacturing.

Microstructures and Grain Refinement of Additive-Manufactured Ti-xW Alloys

“…[11][12][13][14][15] In addition, the growth restriction factor is equivalent to the rate of development of constitutional undercooling (DT c ) relative to the rate of development of solid (f s ). [16] Recent work includes the work of Tamirisakandala et al who reported the effect of boron on the grain refinement of as-cast Ti-6Al-4V and Ti-6242 [17] and Bermingham et al who studied the same effect for as-cast commercially pure titanium.…”

Conception of New Air Target SZERSZEŃ-2

“…This brings cost reduction for small quantities [2] and decreases man-hours in traditional methods. Additive manufacturing technologies enable manufacturing complex parts containing cavities [3]. The 3D printing technology is used in the aerospace industry to make lightweight parts such as the wing with lattice structure [4].…”

3D printing cement based ink, and it’s application within the construction industry

“…According to Literatures, the two main parameters controlling the process of the 3D printing are the printing machine, and the printing ink, which accordingly could determine what kind of product the process could produce [4]. However, for construction purposes, there were 3 main categories that all the trials will fall under: Contour Crafting Method, D-Shape method, and Concrete Printing Method [5].…”