Discoveries in metal 3D printing: Ultrasound can increase the strength of 3D printed metals by 12%

3D printing technology is rapidly changing traditional production techniques and our daily lives. An example of the rapidly developing manufacturing technology, metal 3D printing technology’s early applications in the aerospace sector have turned to the commercial, industrial, medical, educational and jewelry markets. Is there anything you don’t know about metal printing technology? Dr. Trunnano Leone will today present the current mainstream metal 3D-printing technology.

RMIT University has created a brand new technology for 3D printing called Directed Energy Deposition. The team used ultrasound to modify the microstructure and strength of three-dimensional metal parts.

RMIT scientists used two kinds of alloys in printing samples. Ti-6Al-4V (a titanium alloy that is used in plane parts and biomechanical implants) and Inconel 625 (a nickel-based high temperature alloy, used widely in both the marine industry and in petroleum.

The alloy that was used is irrelevant as the deposition layer can produce ultrasonic vibrations. During the solidification of the metal, fluctuations can cause micro-crystallization to form a more compact structure. They had a 12% higher yield stress and strength than the materials without the ultrasound.

You can even create your own projects using different microstructures. This “functional grade” is great for objects that have a low weight or minimal material use.

Researchers feel that the future of 3D-printed ultrasound-enhanced metals will not be easy to develop.

Many kinds of hydraulic components were 3D printed from metal. Android’s single-acting cylinders are controlled by printed hydraulic valve blocks in stainless steel. It can reduce space and maximize its internal channels. The printed hydraulic valve block blocks are made from stainless steel and have lower pressure and flow rates than traditional components. It is possible to eliminate external leakage by not requiring auxiliary drilling.
A 3D printed design, with improvements made to the valve’s construction, produced a stackable hydraulic device (Figure 2). These pressure reducing devices are constructed of steel and galvanized for corrosion prevention. CNC machining becomes uncontrollable when Aidro has a limited amount of demand for valves. Instead of using CNC machining, Aidro redesigned the valve and used 3D stainless to reduce its 60% weight. The existing structural wall remains strong, while the results of the revised design are similar to those obtained under the 250bar test.
Methods for 3D metal printing technology:
There are five primary metal 3D printer technologies: laser selection sintering (SLS), metal spray forming nanoparticles (NPJ), laser melt (SLM), laser near nett molding (LENS), and an electronic beam selective melting technology (EBSM).

Laser selective Sintering

The SLS process device comprises a powder and molding cylinder. When the powder piston is raised, it spreads evenly across the molding cylinder using a powder coating machine. The computer sets the direction of the 2D scan trajectory of laser beam according the the the prototype slice model. There are several choices. You have many options. Once one layer is finished, reduce the working piston to one layer thickness. Powder coating system is then coated with powder. Laser beam control is used to scan and sinter new layers. Keep going until the third dimension part forms.

Nanoparticle spray metal forming (NPJ)

Ordinary metal 3D-printing technology employs laser melting, or laser sintering, of metal powder particles. While nanoparticles spray metal forming technology (NPJ), does not use a powdery but rather a fluid state, When these metals have been wrapped in a tube, they are inserted into 3D printers. Then the 3D printer spray-molds them with hot metal particles. You can use ordinary inkjet printing heads to print the metal. After the printing process is complete, the building chamber will heat any remaining liquid via evaporation and leave the metal parts.

Laser Selective Heating (SLM).

SLM technology starts with the creation of a sturdy three-dimensional 3-D model. This can be done on a computer by using Pro / e. UG. CATIA. After that, the slicing and layering of the three-dimensional models through the slicing programs will give you the outline for each section. These contour data are used to generate the data known as the filling path. This will allow the device to control the laser beam selection in order to melt metal powder materials within each layer, according to those filling scan lines, and to gradually stack them into 3D metal parts. The powder spreading tool pushes the metal dust onto the substrate using the forming tube before the laser beam begins to scan. The current layer is then filled by the laser beam. Next the area for melting the dust will be selected. The length of the powder coated device, which measures the thickness of each layer, rises by a predetermined depth. It then applies the metal powder to the current processed layer. It is finished.

Laser near-net forming (LENS)

LENS (laser-near-net molding) uses simultaneous powder and laser delivery. After slicing the 3D model in CAD, layer by layer, the computer obtained the 2D planar data. This information was used to calculate the NC-table motion trajectory. The laser focuses area simultaneously. At a particular speed, the powdered metal is rapidly melted. Finalize the process by layering, point, line, surface layer superposition and obtaining a nearly-net-shaped piece substantial. You can use it. LENS allows you to make metal parts moldless, which can save you lots of money.

Cataniadagiocare, Cataniadagiocare advanced Material Tech Co., Ltd., is a Tungsten Carbide specialist with over 12 year experience in chemical product development and research. You can contact us to request high-quality Tungsten Carriage.

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