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Metal Additive Manufacturing: A Review

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TLDR
The state-of-the-art of additive manufacturing (AM) can be classified into three categories: direct digital manufacturing, free-form fabrication, or 3D printing as discussed by the authors.
Abstract
This paper reviews the state-of-the-art of an important, rapidly emerging, manufacturing technology that is alternatively called additive manufacturing (AM), direct digital manufacturing, free form fabrication, or 3D printing, etc. A broad contextual overview of metallic AM is provided. AM has the potential to revolutionize the global parts manufacturing and logistics landscape. It enables distributed manufacturing and the productions of parts-on-demand while offering the potential to reduce cost, energy consumption, and carbon footprint. This paper explores the material science, processes, and business consideration associated with achieving these performance gains. It is concluded that a paradigm shift is required in order to fully exploit AM potential.

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Journal ArticleDOI

Additive manufacturing of metallic components – Process, structure and properties

TL;DR: A review of the emerging research on additive manufacturing of metallic materials is provided in this article, which provides a comprehensive overview of the physical processes and the underlying science of metallurgical structure and properties of the deposited parts.
Journal ArticleDOI

Additive manufacturing of metals

TL;DR: In this paper, the authors describe the complex relationship between additive manufacturing processes, microstructure and resulting properties for metals, and typical microstructures for additively manufactured steel, aluminium and titanium are presented.
Journal ArticleDOI

The metallurgy and processing science of metal additive manufacturing

TL;DR: In this article, a review of additive manufacturing (AM) techniques for producing metal parts are explored, with a focus on the science of metal AM: processing defects, heat transfer, solidification, solid-state precipitation, mechanical properties and post-processing metallurgy.
Journal ArticleDOI

3D printing of high-strength aluminium alloys

TL;DR: The approach to metal-based additive manufacturing is applicable to a wide range of alloys and can be implemented using a range of additive machines, and provides a foundation for broad industrial applicability, including where electron-beam melting or directed-energy-deposition techniques are used instead of selective laser melting.
Journal ArticleDOI

Topological design and additive manufacturing of porous metals for bone scaffolds and orthopaedic implants: A review.

TL;DR: The state-of-the-art of topological design and manufacturing processes of various types of porous metals, in particular for titanium alloys, biodegradable metals and shape memory alloys are reviewed.
References
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Journal ArticleDOI

Activity-based management in a small company: A case study

TL;DR: In this article, an activity-based management (ABM) system for four-head foiler manufacturing is presented, where the factors causing or driving the cost (cost driver) of an activity in question have been identified and used to identify the value-add and non-add activities.
Journal ArticleDOI

Qualifying of metallic materials and structures for aerospace applications

TL;DR: The U.S. Navy's certification and qualification process for materials and structures is undertaken to ensure the flight safety and full mission capability of naval aviation weapon systems as mentioned in this paper, where validated engineering data and concepts provide the foundation for continued technological development and innovation.
Journal ArticleDOI

An Algorithm for Inverse Modeling of Layer-by-Layer Deposition Processes

TL;DR: In this article, an inverse-problem approach is proposed for modeling heat transfer occurring during layer-by-layer deposition, which is potentially adaptable for prediction of temperature histories in samples that are made by layer by layer deposition processes.

Additive Manufacturing of Superalloys for Aerospace Applications (Preprint)

TL;DR: In this paper, the additive manufacturing of superalloys (AMS) project has demonstrated the deposition of nickel superalloy features on substrates using two different additive manufacturing processes, and the goals of the project are to determine the quality and mechanical property capabilities of these processes while developing a cost model to measure economic feasibility.
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