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

3D printing technology is rapidly changing traditional manufacturing processes and our daily lives. An example of emerging manufacturing technology, metal 3D printing technology’s early applications in aerospace have turned to medical, engineering, education, and jewelry markets. Is there anything you don’t know about metal printing technology? Today Dr. TrunnanoLeo will share the current mainstream metal 3D-printing technology.

RMIT University has created a brand new technology for 3D printing called Directed Energy Deposition.

RMIT researchers believed that they printed samples with two common alloys. Ti-6Al-4V was used to make titanium parts for biomechanical implants and aircraft components. Inconel 625 has been widely used in both the marine and petroleum sectors.

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.

Another option is to create projects that have different microstructures. You simply need to turn the generator on/off during printing. Functional grading, also known as “functional printing,” is used to create objects with lower weights or lesser material usage.

Researchers feel that it’s possible to make use of ultrasound-enhanced 3-D printing technology in the future for stainless steel, cobalt and aluminum alloys.

Many different types of hydraulic components are 3D printed with metallic. 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 hydrostatic valve (Figure 2). These pressure-reducing valves, which can be used directly to reduce pressure and prevent corrosion are made out of steel. CNC machining becomes uncontrollable when Aidro has a limited amount of demand for valves. The new design of the valve, made with 3D stainless metal, reduced the weight by 60 percent. The existing structural wall remains strong, while the results of the revised design are similar to those obtained under the 250bar test.
Methods of 3D metal printing technology:
There are five primary metal 3D printer technologies: laser selection sintering (SLS), laser close-net molding(LENS), laser selective melting (SLM), nanoparticles spray metal forming (NPJ), laser specific melting (SLM), and electron beam selected melting (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 many choices. You have many options. After one layer is finished, reduce the working piston to one thickness. Coat the powder coating with new powder. Laser beam control is used to scan and heat the new layer. Keep going until you have a part that is three-dimensional.

Nanoparticle spray metal forming (NPJ)

Ordinary metal 3D-printing technology employs laser melting, or laser sintering, of metal powder particles. While nanoparticle metal spraying (NPJ), technology does not utilize a powdery, it uses a fluid state. When these metals have been wrapped in a tube, they are inserted into 3D printers. 3D printing uses metal iron particles with “hot” metal. You can use ordinary inkjet printing heads to print the model. When 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 makes it simple. To begin, design a sturdy three-dimensional version of the part in a computer. Use three-dimensional modeling software Pro / e. UG. CATIA. After that, slice and layer the model through the slicing application to determine the outline for each section. The filling scan path data is derived from contour data. This will allow the device control the laser beam to melt metal powder materials on each layer in accordance with these filling scanlines and stack them as three-dimensional elements. The laser beam scans first before the powder spreading tool pushes on the metal powder to the substrate. The current layer is then filled by the laser beam. Next the current layer is processed. The length of the powder coated device, which measures the thickness of each layer and rises by a specific depth, spreads metal powder onto the processed current layer. It then transfers the data to determine the contour of next layers for processing. It is finished.

Laser near-net forming (LENS)

Laser near-net technology (LENS) uses simultaneous laser/powder delivery. After slicing the 3D-CAD model, layer by layers of the part was obtained from the computer. Next, the NC table converted the 2D planar data into the motion trajectory. The laser focusing is simultaneously used to melt and freeze the metal powder. From the combination of layer, point,line, and surface layers superposition, you can finally obtain a substantially-shaped piece. You can use it. LENS can enable moldless metal part manufacturing, saving you a lot.

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

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