Metal Additive Manufacturing Review Writing, Digital Manufacturing - Engineering Assignment Help

Assignment Task

Introduction 
ASTM has defined additive manufacturing (AM) as ‘‘a process of joining materials to make objects from 3D model data, usually layer upon layer, as opposed to subtractive manufacturing methodologies. Synonyms: additive fabrication, additive processes, additive techniques, additive layer manu facturing, layer manufacturing, and freeform fabrication’’ (Ref 1). This definition is broadly applicable to all classes of materials including metals, ceramics, polymers, composites, and biological systems. While AM has been around as a means of processing materials for, arguably, over two decades, it has only recently begun to emerge as an important commercial manufacturing technology. 
In 2009, Bourell et al. (Ref 2) published a roadmap for AM based on a workshop of 65 key people in AM.

Their report explored important facets of the AM including: 
• Design 
• Process modeling and control 
• Materials, processes, and machines 
• Biomedical applications 
• Energy and sustainability applications 
In 2010, Frazier (Ref 3) published the results of a Navy workshop entitled ‘‘direct digital manufacturing (DDM) of metallic components: affordable, durable, and structurally efficient aircraft.’’ A vision of parts on demand when and where they are needed was articulated. Achieving the vision state would enhance operational readiness, reduce energy consumption, and reduce the total ownership cost of naval aircraft through the use of AM. Specific technical challenges 
 

 
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