Journal ArticleDOI
A review of technological improvements in laser-based powder bed fusion of metal printers
Amir Mahyar Khorasani,Amir Mahyar Khorasani,Ian Gibson,Ian Gibson,Jithin Kozhuthala Veetil,Amir Hossein Ghasemi +5 more
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TLDR
In this paper, new industrial improvements in laser powder bed fusion (LPBF) of metals are discussed, and the most innovations and future directions of LPBF printers are toward increasing the speed of the process by using interchangeable feedstock chamber, closed-loop control powder handling, automated powder sieving, multi-layer concurrent printing, 2-axis coating and multi powder hoppers.Abstract:
Additive manufacturing (AM) is an emerging process that has been extremely improved in terms of technology and application in recent years. In this technology review, new industrial improvements in laser powder bed fusion (LPBF) of metals are discussed. LPBF has the lowest build rate among all AM processes that produce metals such as electron beam powder bed fusion, direct energy deposition, binder jetting and sheet lamination. The findings of the current research show that the most innovations and future directions of LPBF printers are toward increasing the speed of the process by using interchangeable feedstock chamber, closed-loop control powder handling, automated powder sieving, multi-layer concurrent printing, 2-axis coating and multi powder hoppers. To increase the speed of the process, the new improvements for transferring time and using fast lasers are presented. Another innovation in the building of LPBF printers is enhancing part quality by improving lasers with the shorter beam diameter, multi-lasers, uniform inert gas flow, accurate positioning systems, using high vacuum systems and using sensors and automation.read more
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Journal ArticleDOI
Wire and arc additive manufacturing : Opportunities and challenges to control the quality and accuracy of manufactured parts
TL;DR: In this paper, the authors focus on process planning including build orientation, slicing, and path planning, as well as the definition of process parameter selection from a single track to multi-track and multilayer, and finally geometric features from a thinwall to lattice structures with several case studies.
Journal ArticleDOI
Advances in powder bed fusion 3D printing in drug delivery and healthcare.
Atheer Awad,Fabrizio Fina,Alvaro Goyanes,Alvaro Goyanes,Alvaro Goyanes,Simon Gaisford,Abdul Basit,Abdul Basit +7 more
TL;DR: Powder bed fusion (PBF) is a 3D printing method that selectively consolidates powders into 3D objects using a power source as mentioned in this paper, which can be used for the fabrication of bespoke drug-laden formulations, devices and implants.
Journal ArticleDOI
Additive manufacturing of metallic and polymeric load-bearing biomaterials using laser powder bed fusion: A review
TL;DR: An overview of the laser powder bed fusion (L-PBF) method for the fabrication of load-bearing metallic and polymeric biomaterials is given in this paper, where the most important loadbearing applications include orthopedic, traumatological, craniofacial, maxillofacial, and dental applications.
Journal ArticleDOI
3D Printing: An Alternative Microfabrication Approach with Unprecedented Opportunities in Design.
Hari Kalathil Balakrishnan,Faizan Badar,Egan H. Doeven,James I. Novak,Andrea Merenda,Ludovic F. Dumée,Jennifer Loy,Rosanne M. Guijt +7 more
TL;DR: With the feasibility of 3D printed microfluidics established, this work looks ahead at trends in 3D printing to gain insights toward the future of this technology beyond the sole prism of being an alternative fabrication approach.
Journal ArticleDOI
A review on metallurgical aspects of laser additive manufacturing (LAM): Stainless steels, nickel superalloys, and titanium alloys
TL;DR: In this paper , a review of the state of the art in 3D printing is presented and the gaps in the scientific understanding are underlined, which may limit the growth of LAM technology for the design of metallic parts.
References
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BookDOI
Additive manufacturing technologies : 3D printing, rapid prototyping, and direct digital manufacturing
TL;DR: A conceptual overview of rapid prototyping and layered manufacturing is given, beginning with the fundamentals so that readers can get up to speed quickly as mentioned in this paper, with a broad range of technical questions to ensure comprehensive understanding of the concepts covered.
Journal ArticleDOI
Additive manufacturing: rapid prototyping comes of age
TL;DR: In this article, the editors of Rapid Prototyping Journal provide a personalised view by collecting their years of experience in a series of observations and experiences that can be considered as a snapshot of where this technology is today.
Journal ArticleDOI
A new approach to the design and optimisation of support structures in additive manufacturing.
TL;DR: In this article, a new approach to the design of support structures that optimise the part built orientation and the support cellular structure is presented, which can achieve significant materials savings, thus increasing the sustainability and efficiency of metallic AM.
Book ChapterDOI
Review of additive manufacturing technologies and applications in the aerospace industry
TL;DR: Additive manufacturing (AM) is transforming all segments of the aerospace industry, including commercial and military aircraft, space applications, as well as missiles systems as mentioned in this paper, due to the unique ability of AM to produce parts with complex designs, reduce manufacturing costs (material waste, assembly due to part consolidation, and the need for tools and fixtures), and fabricate parts with premium materials with small production runs.
Journal ArticleDOI
Heat transfer and material flow during laser assisted multi-layer additive manufacturing
TL;DR: In this article, a three-dimensional, transient, heat transfer and fluid flow model is developed for the laser assisted multilayer additive manufacturing process with coaxially fed austenitic stainless steel powder.