Selective laser melting of CP-Ti to overcome the low cost and high performance trade-off

2020 ◽  
Vol 34 ◽  
pp. 101198 ◽  
Author(s):  
Qiying Tao ◽  
Zhangwei Wang ◽  
Gang Chen ◽  
Wei Cai ◽  
Peng Cao ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Low Cost ◽  
Laser Melting ◽  
Trade Off ◽  
Cp Ti

Modeling the Selective Laser Melting of Multi-Component Thermoelectric Powders

2018 ◽  
Author(s):  
Yongjia Wu ◽  
Lei Zuo ◽  
Kan Sun
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Low Cost ◽  
Electrical Energy ◽  
Device Fabrication ◽  
Thermoelectric Device ◽  
Laser Melting ◽  
Thermoelectric Modules ◽  
Powder Bed ◽  
Unique Method

Thermoelectrics enables thermal and electrical energy conversion or device cooling without any moving parts. It has remained a significant challenge to manufacture compact and high performance thermoelectric modules in a large volume using the conventional methods because of their drawbacks in practice, such as the long processing time and misalignment of individual thermoelectric elements. Selective laser melting (SLM) based additive manufacturing approach might offer a unique method to fabricate the low cost, reliable, highly efficient, scalable, and environmentally friendly thermoelectric modules. To understand the thermodynamic and hydrodynamic phenomenon during the SLM processing is of critical importance to ensure high quality products. In this paper, we developed a model which can be used to guide the SLM manufacturing of thermoelectric material with other nanoparticles embedded for higher thermoelectric performance. This physical model based on the continuous equations had the ability to analyze the fluid flow driven by buoyancy force and surface tension, which can be used to analyze the influence of the process parameters on the pool size, particle segregation, as well as temperature distribution within the powder bed. This information is very useful for developing robust SLM for thermoelectric device fabrication.

scholarly journals Technology fusion of metal injection moulding and selective laser melting for the manufacture of complex and multifunctional (hydraulic) components

2020 ◽  
Vol 4 (1) ◽  
pp. 1-8
Author(s):  
Martin Herold ◽  
Camilo Zopp ◽  
Oliver Neiske ◽  
Frank Schubert ◽  
Jan Hustert ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Selective Laser Melting ◽  
Injection Moulding ◽  
High Performance ◽  
Joint Strength ◽  
Laser Melting ◽  
Lightweight Construction ◽  
Pressure Test ◽  
Conventional Titanium Alloy ◽  
Very High

Selective laser melting (SLM) and metallic injection moulding (MIM) are established processes for the production of high-performance metallic components for small and large series. In the aerospace industry, where very high demands are placed on materials and components, both processes are still considered to be relatively new. In both processes, the conventional titanium alloy Ti-6Al-4V can be used in the form of powder. Currently, both technologies are only considered separately. By fusing components of the same type, multifunctional components with a high lightweight construction potential can be produced. In order to generate direct material fusion, the MIM component must be mechanically processed accordingly. In addition, suitable SLM process parameters must be developed in order to ensure both generative construction and high joint strength. To this end, a characterisation of the joining zone and the static joint strength was carried out. Furthermore, pressure test samples were designed and examined both statically and for fatigue strength. Thus, a high static joint strength could be proven. The compression test samples also withstood a fatigue strength of over 1 million cycles.

Cost-affordable, high-performance Ti–TiB composite for selective laser melting additive manufacturing

2020 ◽  
Vol 35 (15) ◽  
pp. 1922-1935 ◽  
Author(s):  
Yangping Dong ◽  
Yulong Li ◽  
Thomas Ebel ◽  
Ming Yan
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
High Performance ◽  
Laser Melting ◽  
Image Position

Abstract

Effect of laser parameters on microstructure, metallurgical defects and property of AlSi10Mg printed by selective laser melting

2017 ◽  
Vol 02 (04) ◽  
pp. 1750017 ◽  
Author(s):  
Hong Wu ◽  
Junye Ren ◽  
Qianli Huang ◽  
Xiongfei Zai ◽  
Ling Liu ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Tensile Strength ◽  
Phase Composition ◽  
Selective Laser Melting ◽  
High Performance ◽  
Formation Mechanisms ◽  
Laser Melting ◽  
Laser Parameters ◽  
Metallurgical Defects ◽  
Metallurgical Defect

AlSi10Mg alloy has been widely used in selective laser melting (SLM). However, the formation of metallurgical defects in this material during SLM process has not been studied sufficiently. In this work, different laser parameters were adopted to fabricate the specimens. The effects of volumetric energy density (VED) on the metallurgical defect, densification, phase composition and mechanical property were also comprehensively analyzed. At low VED of 37.39[Formula: see text]J/mm3, a nearly full dense sample with density of 2.602[Formula: see text]g/cm3 can be printed. The sample with maximal tensile strength of 475[Formula: see text]MPa can be printed. While with the increase of VED, the ultimate tensile strength decreases due to the formation of micro-pores. The formation mechanisms of micro-pores including gas pores and keyhole-induced pores were disclosed from the angle of alloy smelting. Better understanding of the influence mechanisms of the laser parameters on the formation of metallurgical defects is beneficial for the production of high performance SLM parts.

scholarly journals Net shaped high performance oxide ceramic parts by selective laser melting

2010 ◽  
Vol 5 ◽  
pp. 587-594 ◽  
Author(s):  
Hagedorn Yves-Christian ◽  
Wilkes Jan ◽  
Meiners Wilhelm ◽  
Wissenbach Konrad ◽  
Poprawe Reinhart
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Oxide Ceramic ◽  
Laser Melting

scholarly journals Selective Laser Melting of Al-Based Matrix Composites with Al2O3 Reinforcement: Features and Advantages

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2648
Author(s):  
Ivan A. Pelevin ◽  
Anton Yu. Nalivaiko ◽  
Dmitriy Yu. Ozherelkov ◽  
Alexander S. Shinkaryov ◽  
Stanislav V. Chernyshikhin ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Aluminum Matrix ◽  
Modern Method ◽  
Homogeneous Distribution ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Powder Preparation ◽  
Laser Melting ◽  
Conventional Methods

Aluminum matrix composites (AMC) are of great interest and importance as high-performance materials with enhanced mechanical properties. Al2O3 is a commonly used reinforcement in AMCs fabricated by means of various technological methods, including casting and sintering. Selective laser melting (SLM) is a suitable modern method of the fabrication of net-shape fully dense parts from AMC with alumina. The main results, achievements, and difficulties of SLM applied to AMCs with alumina are discussed in this review and compared with conventional methods. It was shown that the initial powder preparation, namely the particle size distribution, sphericity, and thorough mixing, affected the final microstructure and properties of SLMed materials drastically. The distribution of reinforcing particles tends to consolidate the near-melting pool-edges process because of pushing by the liquid–solid interface during the solidification process that is a common problem of various fabrication methods. The achievement of an homogeneous distribution was shown to be possible through both the thorough mixing of the initial powders and the precise optimization of SLM parameters. The strength of the AMCs fabricated by the SLM method was relatively low compared with materials produced by conventional methods, while for superior relative densities of more than 99%, hardness and tribological properties were obtained, making SLM a promising method for the Al-based matrix composites with Al2O3.

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