3D-Printing Damage-Tolerant Architected Metallic Materials with Shape Recoverability via Special Deformation Design of Constituent Material

Rebielskij-type design of a rolled con rod preform and appropriate upper and lower dies are presented. The proposed process was tested by Simufact Forming program and modifications made to satisfy the criteria of shape, stress and strain state and temperature distribution during processing. Based on the CAD documentation, a STL file was prepared for 3D polymer printing the die, the con rod preform and the forging. The results will enable 3D printing of prototypes in the appropriate metallic materials, leading to tool manufacture and processing in industrial conditions.

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Frontiers of Additively Manufactured Metallic Materials

Materials ◽

10.3390/ma11091566 ◽

2018 ◽

Vol 11 (9) ◽

pp. 1566 ◽

Cited By ~ 10

Author(s):

Amir Zadpoor

Keyword(s):

Additive Manufacturing ◽

3D Printing ◽

Industrial Applications ◽

Cutting Edge ◽

Future Research ◽

Complex Geometries ◽

Metallic Materials ◽

Special Issue ◽

Manufacturing Techniques ◽

Technological Platform

Additive manufacturing (AM) (=3D printing) has emerged during the last few years as a powerful technological platform for fabrication of functional parts with unique complex geometries and superior functionalities that are next to impossible to achieve using conventional manufacturing techniques. Due to their importance in industrial applications and the maturity of the applicable AM techniques, metallic materials are at the forefront of the developments in AM. In this editorial, which has been written as a preamble to the special issue “Perspectives on Additively Manufactured Metallic Materials”, I will highlight some of the frontiers of research on AM of metallic materials to help readers better understand the cutting edge of research in this area. Some of these topics are addressed in the articles appearing in this special issue, while others constitute worthy avenues for future research.

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Surface Analysis of 3D (SLM) Co–Cr–W Dental Metallic Materials

Applied Sciences ◽

10.3390/app11010255 ◽

2020 ◽

Vol 11 (1) ◽

pp. 255

Author(s):

Elena-Raluca Baciu ◽

Ramona Cimpoeșu ◽

Anca Vițalariu ◽

Constantin Baciu ◽

Nicanor Cimpoeșu ◽

...

Keyword(s):

3D Printing ◽

Surface Analysis ◽

Surface Condition ◽

Surface States ◽

Scratch Test ◽

Metallic Materials ◽

Liquid Droplets ◽

Printing Process ◽

Hardening Process ◽

Micro Cracks

The surface condition of the materials involved in dentistry is significant for the subsequent operations that are applied in oral cavity. Samples of Co–Cr–W alloy, obtained through selective laser melting (SLM) 3D printing, with different surface states were analyzed. Surface analysis after the 3D printing process and sandblasting was realized from microstructural, chemical composition, profilometry, droplet adhesion, scratch test, and microhardness perspectives. The results presented a hardening process and a roughness modification following the sandblasting procedure, a better adhesion of the liquid droplets, the appearance of micro-cracks during the scratch test, and the oxidation of the sample after the 3D printing process and surface processing.

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A defect-resistant Co–Ni superalloy for 3D printing

Nature Communications ◽

10.1038/s41467-020-18775-0 ◽

2020 ◽

Vol 11 (1) ◽

Cited By ~ 2

Author(s):

Sean P. Murray ◽

Kira M. Pusch ◽

Andrew T. Polonsky ◽

Chris J. Torbet ◽

Gareth G. E. Seward ◽

...

Keyword(s):

3D Printing ◽

Electron Beam Melting ◽

Room Temperature ◽

Economic Value ◽

High Strength ◽

Metallic Materials ◽

Processing Conditions ◽

Base Materials ◽

Major Transformation ◽

Nuclear Applications

Abstract Additive manufacturing promises a major transformation of the production of high economic value metallic materials, enabling innovative, geometrically complex designs with minimal material waste. The overarching challenge is to design alloys that are compatible with the unique additive processing conditions while maintaining material properties sufficient for the challenging environments encountered in energy, space, and nuclear applications. Here we describe a class of high strength, defect-resistant 3D printable superalloys containing approximately equal parts of Co and Ni along with Al, Cr, Ta and W that possess strengths in excess of 1.1 GPa in as-printed and post-processed forms and tensile ductilities of greater than 13% at room temperature. These alloys are amenable to crack-free 3D printing via electron beam melting (EBM) with preheat as well as selective laser melting (SLM) with limited preheat. Alloy design principles are described along with the structure and properties of EBM and SLM CoNi-base materials.

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3D Printing of Non-Metallic Materials

10.4028/www.scientific.net/978-3-0357-3504-8 ◽

2021 ◽

Author(s):

Robert J. Lancaster ◽

Alessandro Fortunato ◽

Stanislav Kolisnychenko

Keyword(s):

3D Printing ◽

Metallic Materials

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The synthesis of new metal materials, including the ones that are obtained by 3D-printing methods, based on nonlinear dynamics and artificial intelligence approaches

10.36652/0042-4633-2021-6-67-71 ◽

2021 ◽

pp. 67-71

Author(s):

Keyword(s):

Neural Network ◽

Time Series ◽

Acoustic Emission ◽

3D Printing ◽

Intelligent System ◽

Neural Network Modeling ◽

Metallic Materials ◽

Fractal Characteristics ◽

Metal Materials ◽

Trained Neural Network

An intelligent system for forecasting the properties of metallic materials is developed. On the basis of a specially trained neural network, a model of a dynamic system for the synthesis of new materials, including by 3D printing, is obtained, which is capable of forecasting time series similar to the evolution of fractal characteristics of acoustic emission emitted during crystallization. Keywords: material, neural network, modeling, acoustic emission, forecasting, time series, fractal dimension, synthesis. [email protected]

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Rotational 3D printing of damage-tolerant composites with programmable mechanics

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1715157115 ◽

2018 ◽

Vol 115 (6) ◽

pp. 1198-1203 ◽

Cited By ~ 78

Author(s):

Jordan R. Raney ◽

Brett G. Compton ◽

Jochen Mueller ◽

Thomas J. Ober ◽

Kristina Shea ◽

...

Keyword(s):

3D Printing ◽

Mechanical Performance ◽

Damage Tolerance ◽

Short Fibers ◽

Natural Systems ◽

Performance Space ◽

Natural Composites ◽

And Performance ◽

Damage Tolerant ◽

Carbon Fiber Epoxy

Natural composites exhibit exceptional mechanical performance that often arises from complex fiber arrangements within continuous matrices. Inspired by these natural systems, we developed a rotational 3D printing method that enables spatially controlled orientation of short fibers in polymer matrices solely by varying the nozzle rotation speed relative to the printing speed. Using this method, we fabricated carbon fiber–epoxy composites composed of volume elements (voxels) with programmably defined fiber arrangements, including adjacent regions with orthogonally and helically oriented fibers that lead to nonuniform strain and failure as well as those with purely helical fiber orientations akin to natural composites that exhibit enhanced damage tolerance. Our approach broadens the design, microstructural complexity, and performance space for fiber-reinforced composites through site-specific optimization of their fiber orientation, strain, failure, and damage tolerance.

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