Rapid fabrication of Al-based bulk-form nanocomposites with novel reinforcement and enhanced performance by selective laser melting

Gu, Dongdong; Wang, Hongqiao; Dai, Donghua; Yuan, Pengpeng; Meiners, Wilhelm; Poprawe, Reinhart

doi:10.1016/j.scriptamat.2014.10.011

Cited by 227 publications

(83 citation statements)

References 26 publications

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“…30 The surface tension gradient will induce the Marangoni flow from a region of low surface tension to a region of high surface tension, thereby inducing thermocapillary forces exerted on the particles by the wetting liquid. [31][32][33][34][35] The rearrangement rate of the in situ Al 4 SiC 4 particles is accordingly enhanced, leading to a homogeneous distribution of the significantly refined nanoscale Al 4 SiC 4 particles (Fig. 5(c)).…”

Section: Resultsmentioning

confidence: 99%

Tailored growth of in situAl₄SiC₄ in laser melted aluminum melt

Chang

2015

Mod. Phys. Lett. B

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The crystallization and growth of in situ crystals during non-equilibrium laser rapid melting/solidification process is an important research topic in the fields of both Applied Physics and Materials Science. The present paper studies the development mechanisms of in situ formed Al 4 SiC 4 ceramic phase within the selective laser melted SiC/AlSi10Mg composites. Two different-structured Al 4 SiC 4 having strip and particle morphologies were disclosed and their growth mechanisms were influenced by laser linear energy density (LED). An elevated LED resulted in a larger degree formation of strip-structured Al 4 SiC 4 with the gradually coarsened crystal sizes in its length and thickness. The homogeneously dispersed particle-shaped Al 4 SiC 4 exhibited a considerably refined nanostructure with a proper increase in LED, but showing a significant coarsening of particles at an excessive LED.

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Section: Resultsmentioning

confidence: 99%

Tailored growth of in situAl₄SiC₄ in laser melted aluminum melt

Chang

2015

Mod. Phys. Lett. B

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“…Al MMCs are most commonly investigated by reinforcing with TiC, Al 2 O 3 , carbon nanotube, SiC, or Mg 2 AlO 4 . To have a positive influence on mechanical properties, the added reinforcements should be typically very fine in nano‐size ranges . Regarding the effects of laser energy on the reinforcement distributions, for instance, Figure schematically presents the dispersion dynamics of TiC reinforcement in a hypothetical AlSi10Mg matrix.…”

Section: The “Ex Situ” Approach In Manufacturing Mmcs Via Slm and Thementioning

confidence: 99%

Selective Laser Melting to Manufacture “In Situ” Metal Matrix Composites: A Review

et al. 2019

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After a brief introduction on selective laser melting (SLM) and "ex situ" manufacture of metal matrix composites (MMCs), this paper reviews the capacities and benefits of SLM to activate and control various "in situ" reactions during fabrication of 3D parts. It introduces several systems (such as etc.) used to manufacture Al-based, Ti-based, and steel-based "in situ" MMCs. Then, it illustrates the novel microstructural characteristics of these SLM-made "in situ" MMCs for different cases, as they may appear from nano-particles to nano-whiskers and dendritic reinforcements homogeneously distributed in a metal matrix. It also focuses on SLM associated "in situ" mechanisms, explaining how an "in situ" reaction propagates based on "decomposition, diffusion, and reformation" and how the growth mechanisms turn into different morphologies such as rounded particles, whiskers, or polygonal block shapes. The influence of various SLM parameters (such as energy density, laser power/speed, powder layer thickness, and the size of initial powder particles) and the SLM "in situ" challenges are also discussed.

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“…Consequently, a surface tension gradient emerged due to the existence of a temperature gradient, resulting in the formation of Marangoni convection. Based on an investigation by Gu et al [22], Al 2 O 3 particles are continuously pushed and gather under the combined effects of Marangoni convection and torque around the particle, forming a ring-like structure observed in Figure 3. According to the Gibbs-Kelvin formula, fine embossment existing on the surface of an Al 2 O 3 particle can give rise to a remarkable increase in saturated vapor pressure, thus contributing to the partial melting behavior of the Al 2 O 3 particle.…”

Section: Formation Mechanism Of Slm-processed Compositesmentioning

confidence: 99%

Effect of the Thermodynamic Behavior of Selective Laser Melting on the Formation of In situ Oxide Dispersion-Strengthened Aluminum-Based Composites

Wang

Jue

Xia

et al. 2016

Metals

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This paper presents a comprehensive investigation of the phase and microstructure, the thermodynamic behavior within the molten pool, and the growth mechanism of in situ oxide dispersion-strengthened (ODS) aluminum-based composites processed by a selective laser melting (SLM) additive manufacturing/3D printing process. The phase and microstructure were characterized by X-ray diffraction (XRD) and a scanning electronic microscope (SEM) equipped with EDX, respectively. The thermodynamic behavior within the molten pool was investigated for a comprehensive understanding on the growth mechanism of the SLM-processed composite using a finite volume method (FVM). The results revealed that the in situ Al 2 Si 4 O 10 ODS Al-based composites were successfully fabricated by SLM. Combined with the XRD spectrum and EDX analysis, the new silica-rich Al 2 Si 4 O 10 reinforcing phase was identified, which was dispersed around the grain boundaries of the aluminum matrix under a reasonable laser power of 200 W. Combined with the activity of Marangoni convection and repulsion forces, the characteristic microstructure of SLM-processed Al 2 Si 4 O 10 ODS Al-based composites tended to transfer from the irregular network structure to the nearly sphere-like network structure in regular form by increasing the laser power. The formation mechanism of the microstructure of SLM-processed Al 2 Si 4 O 10 ODS Al-based composites is thoroughly discussed herein.

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Rapid fabrication of Al-based bulk-form nanocomposites with novel reinforcement and enhanced performance by selective laser melting

Cited by 227 publications

References 26 publications

Tailored growth of in situAl₄SiC₄ in laser melted aluminum melt

Tailored growth of in situAl₄SiC₄ in laser melted aluminum melt

Selective Laser Melting to Manufacture “In Situ” Metal Matrix Composites: A Review

Effect of the Thermodynamic Behavior of Selective Laser Melting on the Formation of In situ Oxide Dispersion-Strengthened Aluminum-Based Composites

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Rapid fabrication of Al-based bulk-form nanocomposites with novel reinforcement and enhanced performance by selective laser melting

Cited by 227 publications

References 26 publications

Tailored growth of in situAl4SiC4 in laser melted aluminum melt

Tailored growth of in situAl4SiC4 in laser melted aluminum melt

Selective Laser Melting to Manufacture “In Situ” Metal Matrix Composites: A Review

Effect of the Thermodynamic Behavior of Selective Laser Melting on the Formation of In situ Oxide Dispersion-Strengthened Aluminum-Based Composites

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Tailored growth of in situAl₄SiC₄ in laser melted aluminum melt

Tailored growth of in situAl₄SiC₄ in laser melted aluminum melt