scholarly journals Laser engineered net shaping (LENS™): A tool for direct fabrication of metal parts

1998 ◽  
Author(s):  
Clint Atwood ◽  
Michelle Griffith ◽  
Lane Harwell ◽  
Eric Schlienger ◽  
Mark Ensz ◽  
...  
Keyword(s):  
Metal Parts ◽  
Laser Engineered Net Shaping ◽  
Direct Fabrication ◽  
Net Shaping

Direct Rapid Manufacturing Technology with Laser for Metal Parts

2011 ◽  
Vol 328-330 ◽  
pp. 520-523
Author(s):  
Yong Ping Jin ◽  
Ming Hu
Keyword(s):  
Complex Shape ◽  
Selective Laser Sintering ◽  
Manufacturing Technology ◽  
Rapid Manufacturing ◽  
3 Dimensional ◽  
Metal Parts ◽  
Laser Engineered Net Shaping ◽  
Development Direction ◽  
Main Development ◽  
Net Shaping

Directly driven by CAD model, based on principle of discrete-superposition, rapid prototyping technology is the generic terms of rapid manufacturing 3-dimensional physical entities with any complex shape. One of its main development trends is direct rapid manufacturing for metal parts. Up to now, there are many methods utilizing laser beam containing selective laser melting, selective laser sintering and laser engineered net shaping. Research and development of these means for direct rapid metal manufacturing are presented in this paper. Digital direct rapid manufacturing for metal parts represents development direction of advanced manufacturing technology.

RP Technology Used for the Production of Metal Parts

2015 ◽  
Vol 818 ◽  
pp. 280-283
Author(s):  
Veronika Čapková ◽  
Ivana Zetková
Keyword(s):  
Rapid Prototyping ◽  
Modern Technology ◽  
Layer By Layer ◽  
Direct Metal Laser Sintering ◽  
Metal Parts ◽  
Laser Engineered Net Shaping ◽  
Advantages And Disadvantages ◽  
Metal Products ◽  
Net Shaping ◽  
Bottom To Top

Rapid prototyping (RP) is a modern technology which can produce components with very complicated shapes using different materials. This method also allows the production of components with shapes and geometry that would be very difficult to produce using conventional methods such as milling, welding and so on. A 3D printer builds an object from bottom to top, layer by layer. The purpose of this article is to introduce rapid prototyping technology for printing metal products. It focuses on various areas of application, advantages and disadvantages of this manufacturing technology as well as introduction of two methods DMLS (Direct Metal Laser Sintering) and LENS (Laser Engineered Net Shaping).

scholarly journals Understanding the Microstructure and Properties of Components Fabricated by Laser Engineered Net Shaping (LENS)

2000 ◽  
Vol 625 ◽  
Author(s):  
M. L. Griffith ◽  
M. T. Ensz ◽  
J. D. Puskar ◽  
C. V. Robino ◽  
J. A. Brooks ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Manufacturing Processes ◽  
Behavior Control ◽  
Metal Parts ◽  
Laser Engineered Net Shaping ◽  
Solid Models ◽  
Material Fabrication ◽  
Net Shaping ◽  
Aided Design ◽  
Additive Methods

AbstractLaser Engineered Net Shaping (LENS) is a novel manufacturing process for fabricating metal parts directly from Computer Aided Design (CAD) solid models. The process is similar to rapid prototyping technologies in its approach to fabricate a solid component by layer additive methods. However, the LENS technology is unique in that fully dense metal components with material properties similar to wrought materials can be fabricated. The LENS process has the potential to dramatically reduce the time and cost required realizing functional metal parts. In addition, the process can fabricate complex internal features not possible using existing manufacturing processes. The real promise of the technology is the potential to manipulate the material fabrication and properties through precision deposition of the material, which includes thermal behavior control, layered or graded deposition of multi-materials, and process parameter selection.

ESTUDO DA VIABILIADE DA MANUFATURA ADITIVA DIRETA DE MULITA POR LASER ENGINEERED NET SHAPING (LENS)

2021 ◽  
Author(s):  
Thiago Azevedo ◽  
Italo Leite de Camargo ◽  
Johan sebastian Grass Nunez ◽  
Fábio Mariani ◽  
Reginaldo Coelho ◽  
...  
Keyword(s):  
Laser Engineered Net Shaping ◽  
Net Shaping

Microstructure and mechanical property of TiB reinforced Ti matrix composites fabricated by ultrasonic vibration-assisted laser engineered net shaping

2019 ◽  
Vol 25 (3) ◽  
pp. 581-591 ◽  
Author(s):  
Fuda Ning ◽  
Yingbin Hu ◽  
Weilong Cong
Keyword(s):  
Ultrasonic Vibration ◽  
Acoustic Streaming ◽  
Nonlinear Effects ◽  
Small Variation ◽  
Microstructural Characterization ◽  
Matrix Composites ◽  
Heterogeneous Distribution ◽  
Content Type ◽  
Laser Engineered Net Shaping ◽  
Net Shaping

Purpose The purpose of this paper is to identify if the implementation of ultrasonic vibration in laser engineered net shaping (LENS) process can help to reduce internal weaknesses such as porosity, coarse primary TiB whisker and heterogeneous distribution of TiB reinforcement in the LENS-fabricated TiB reinforced Ti matrix composites (TiB-TMC) parts. Design/methodology/approach An experimental investigation is performed to achieve the results for comparative studies under different fabrication conditions through quantitative data analysis. An approach of microstructural characterization and mechanical testing is conducted to obtain the output attributes. In addition, the theoretical analysis of the physics of ultrasonic vibration in the melting materials is presented to explain the influences of ultrasonic vibration on the microstructural evolution occurred in the part fabrication. Findings Because of the nonlinear effects of acoustic streaming and cavitation induced by ultrasonic vibration, porosity is significantly reduced and a relatively small variation of pore sizes is achieved. Ultrasonic vibration also causes the formation of smaller TiB whiskers that distribute along grain boundaries with a homogeneous dispersion. Additionally, a quasi-continuous network (QCN) microstructure is considerably finer than that produced by LENS process without ultrasonic vibration. The refinements of both reinforcing TiB whiskers and QCN microstructural grains further improve the microhardness of TiB-TMC parts. Originality/value The novel ultrasonic vibration-assisted (UV-A) LENS process of TiB-TMC is conducted in this work for the first time to improve the process performance and part quality.

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