Selective Laser Melting of Mixed EP648-Alumina Powder

2019 ◽  
Vol 946 ◽  
pp. 966-971
Author(s):  
R.M. Baitimerov ◽  
A.B. Liberzon ◽  
V.I. Mitin
Keyword(s):  
Electron Microscopy ◽  
Selective Laser Melting ◽  
Metal Matrix ◽  
Complex Shape ◽  
Alumina Powder ◽  
Laser Melting ◽  
Mixed Powder ◽  
Two Component ◽  
Powder Feedstock ◽  
Scanning Electron

Selective laser melting (SLM) technology makes it possible to produce complex shape metallic and metal-matrix composite (MMC) bulk parts from powder feedstock. This paper is devoted to selective laser melting of mechanically mixed metal (gas atomized EP648 alloy) and ceramic (alumina) powders. Four 10x10x5 mm specimen were successfully manufactured using different process parameters. Obtained MMC specimen were characterized by scanning electron microscopy. A possibility of manufacturing of dense EP648-alumina MMC by SLM using two-component mixed powder was shown

Synthesis of EP648-TiC Metal Matrix Composite Powder for Selective Laser Melting by Ball Milling

2017 ◽  
Vol 265 ◽  
pp. 481-485
Author(s):  
P.A. Lykov ◽  
D.A. Zherebtsov ◽  
S.V. Nerush
Keyword(s):  
Electron Microscopy ◽  
Selective Laser Melting ◽  
Metal Matrix ◽  
Composite Powder ◽  
Second Phase ◽  
Additive Technology ◽  
Laser Melting ◽  
Technology Application ◽  
Materials Used ◽  
Scanning Electron

The development of additive manufacturing (SLS/SLM, EBM, DMD) suggests the increase of the range expansion of materials used. One of the most promising directions is products manufacturing from composite materials. The technology of composite micro-powders production on the basis of heat-resistant nickel alloy EP648 and TiC is proposed. The aim of this research is to develop a method of producing composite micropowders for additive technology application. This method is based on modification of the metal micropowders surface by the second phase in a planetary mixer (mechanochemical synthesis).The obtained composite micropowders are compared with powders which are recommended for selective laser melting usage (produced by MTT Technology). The equipment used in the research: planetary mixer, scanning electron microscopy (SEM), optical granulomorphometer Occio 500nano.

Alumina Reinforced EP648 Metal Matrix Composite Produced by Selective Laser Melting Powder Bed Fusion Additive Technology

2021 ◽  
Vol 316 ◽  
pp. 181-186
Author(s):  
P.A. Lykov ◽  
L. V. Radionova
Keyword(s):  
Selective Laser Melting ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Composite Powder ◽  
Additive Technology ◽  
Ceramic Powders ◽  
Laser Melting ◽  
Two Phase ◽  
Powder Bed ◽  
Scanning Electron

This paper is devoted to fabrication of alumina reinforced EP648 matrix composite material, using selective laser melting. of two-phase composite powder, prepared by ball milling of metal and ceramic powders. Five 10x10x5 mm bulk specimens were successfully manufactured using different process parameters. The obtained MMC specimens were characterized by scanning electron microscopy.

The Production and Subsequent Selective Laser Melting of AlSi12 Powder

2017 ◽  
Vol 265 ◽  
pp. 434-438 ◽  
Author(s):  
P.A. Lykov ◽  
A.O. Shults ◽  
K.A. Bromer
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Selective Laser Melting ◽  
Gas Jet ◽  
Laser Melting ◽  
Size And Shape ◽  
Powder Particles ◽  
Scanning Electron

The paper studies the atomization of Al-based alloy AlSi12 in gas jet. Air was used as a spraying gas. The size and shape of powder particles were studied by using scanning electron microscopy and optical granulomorphometer. The obtained powder was used in selective laser melting.

The Properties of Lattice Structures Manufactured Using Selective Laser Melting

2012 ◽  
Vol 445 ◽  
pp. 386-391 ◽  
Author(s):  
Y. Shen ◽  
W.J. Cantwell ◽  
Robert A.W. Mines ◽  
K. Ushijima
Keyword(s):  
Electron Microscopy ◽  
Selective Laser Melting ◽  
Research Study ◽  
Failure Mechanisms ◽  
Lattice Structures ◽  
Laser Melting ◽  
Tension Tests ◽  
Complex Architectures ◽  
Block Structures ◽  
Scanning Electron

This paper outlines the findings of an on-going research study investigating the properties of a range of steel and titanium-based micro-lattice structures manufactured using the selective laser melting (SLM) technique. Initially, tension tests have been conducted on strands manufactured at different build angles. Micro-lattice block structures, with struts oriented at +/-45o were then tested in compression at quasi-static rates of loading. The failure mechanisms have been investigated using both optical and scanning electron microscopy. These tests have highlighted the attractive properties offered by these complex architectures.

scholarly journals The Effect of Building Direction on Microstructure and Microhardness during Selective Laser Melting of Ti6Al4V Titanium Alloy

2021 ◽  
Author(s):  
D. Palmeri ◽  
G. Buffa ◽  
G. Pollara ◽  
L. Fratini
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Titanium Alloy ◽  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Laser Melting ◽  
Ti6al4v Titanium Alloy ◽  
Mechanical Performances ◽  
Scanning Electron

AbstractDuring the last few years, additive manufacturing has been more and more extensively used in several industries, especially in the aerospace and medical device fields, to produce Ti6Al4V titanium alloy parts. During the Selective Laser Melting (SLM) process, the heterogeneity of finished product is strictly connected to the scan strategies and the building direction. An optimal managing of the latter parameters allows to better control and defines the final mechanical and metallurgical properties of parts. Acting on the building direction it is also possible to optimize the critical support structure. In particular, more support structures are needed for the sample at 0°, while very low support are required for the sample at 90°. To study the effects of build direction on microstructure heterogeneity evolution and mechanical performances of selective laser melted Ti6Al4V parts, two build direction samples (0°, 90°) were manufactured and analyzed using optical metallographic microscope (OM) and scanning electron microscopy (SEM). Isometric microstructure reconstruction and microhardness tests were carried out in order to analyze the specimens. The obtained results indicate that the build direction has to be considered a key geometrical parameter affecting the overall quality of the obtained products.

scholarly journals Microstructural Characterization of the Anisotropy and Cyclic Deformation Behavior of Selective Laser Melted AlSi10Mg Structures

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 825 ◽  
Author(s):  
Mustafa Awd ◽  
Felix Stern ◽  
Alexander Kampmann ◽  
Daniel Kotzem ◽  
Jochen Tenkamp ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Selective Laser Melting ◽  
Microstructural Characterization ◽  
Fatigue Tests ◽  
Laser Melting ◽  
Structural Anisotropy ◽  
Scanning Electron

The laser-based fusion of metallic powder allows construction of components with arbitrary complexity. In selective laser melting, the rapid cooling of melt pools in the direction of the component building causes significant anisotropy of the microstructure and properties. The objective of this work is to investigate the influence of build anisotropy on the microstructure and mechanical properties in selective laser melted AlSi10Mg. The alloy is comprehensively used in the automotive industry and has been one of the most frequently investigated Al alloys in additive manufacturing. Using specimens produced in three different building orientations with respect to the build platform, the anisotropy of the microstructure and defects will be investigated using scanning electron microscopy and microcomputed tomography. The analysis showed a seven-times higher pore density for the 90°-specimen compared to the 0°-specimen. The scanning electron microscopy revealed the influence of the direction of the cooling gradient on the constitution of the eutectic phase. Mechanical properties are produced in quasi-static and fatigue tests of variable and constant loading amplitudes. Specimens of 0° showed 8% higher tensile strength compared to 90°-specimens, while fracture strain was reduced almost 30% for the 45°-specimen. The correlation between structural anisotropy and mechanical properties illustrates the influence of the building orientation during selective laser melting on foreseen fields of application.

Selective Laser Melting of AlSi12 Powder

2018 ◽  
Vol 284 ◽  
pp. 667-672
Author(s):  
P.A. Lykov ◽  
R.M. Baitimerov
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Process Parameters ◽  
Complex Shape ◽  
Technological Parameters ◽  
Laser Melting ◽  
Powder Feedstock ◽  
Selection Of ◽  
Low Porosity

Additive manufacturing (AM) technologies make it possible to produce complex shape metallic objects from powder feedstock. AlSi12 alloy is one of the most widely used materials in selective laser melting (SLM). The large number of technological parameters involved complicate the selection of an SLM mode for obtaining a product with the required structure. The goal of this research was to determine the mode which ensures the material’s low porosity. Nine specimens were fabricated by using different SLM process parameters. The fabricated specimens have different microstructures. The lowest porosity that was achieved is about 0.5%.

Properties of aluminum metal matrix composites manufactured by selective laser melting

2021 ◽  
Vol 112 (7) ◽  
pp. 552-564
Author(s):  
Christian Felber ◽  
Florian Rödl ◽  
Ferdinand Haider
Keyword(s):  
Additive Manufacturing ◽  
Aluminum Alloys ◽  
Selective Laser Melting ◽  
Metal Matrix ◽  
High Hardness ◽  
High Strength ◽  
Laser Melting ◽  
Scanning Calorimetry ◽  
Particle Reinforcement ◽  
The Matrix

Abstract The most promising metal processing additive manufacturing technique in industry is selective laser melting, but only a few alloys are commercially available, limiting the potential of this technique. In particular high strength aluminum alloys, which are of great importance in the automotive industry, are missing. An aluminum 2024 alloy, reinforced by Ti-6Al-4V and B4C particles, could be used as a high strength alternative for aluminum alloys. Heat treating can be used to improve the mechanical properties of the metal matrix composite. Dynamic scanning calorimetry shows the formation of Al2Cu precipitates in the matrix instead of the expected Al2CuMg phases due to the loss of magnesium during printing, and precipitation processes are accelerated due to particle reinforcement and additive manufacturing. Strong reactions between aluminum and Ti-6Al-4V are observed in the microstructure, while B4C shows no reaction with the matrix or the titanium. The material shows high hardness, high stiffness, and low ductility through precipitation and particle reinforcement.

scholarly journals Chemical Stability of Ti3C2 MXene with Al in the Temperature Range 500–700 °C

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1979 ◽  
Author(s):  
Jing Zhang ◽  
Shibo Li ◽  
Shujun Hu ◽  
Yang Zhou
Keyword(s):  
Electron Microscopy ◽  
Chemical Stability ◽  
Metal Matrix ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Range ◽  
Transmission Electron ◽  
Work First ◽  
Scanning Electron

Ti3C2Tx MXene, a new 2D nanosheet material, is expected to be an attractive reinforcement of metal matrix composites because its surfaces are terminated with Ti and/or functional groups of –OH, –O, and –F which improve its wettability with metals. Thus, new Ti3C2Tx/Al composites with strong interfaces and novel properties are desired. To prepare such composites, the chemical stability of Ti3C2Tx with Al at high temperatures should be investigated. This work first reports on the chemical stability of Ti3C2Tx MXene with Al in the temperature range 500–700 °C. Ti3C2Tx is thermally stable with Al at temperatures below 700 °C, but it reacts with Al to form Al3Ti and TiC at temperatures above 700 °C. The chemical stability and microstructure of the Ti3C2Tx/Al samples were investigated by differential scanning calorimeter, X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy.

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