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Washington state university has developed a 3D printing material of the structure of the one-step
Jun 04, 2018

Researchers have used this technique to print out nickel chromium and copper structure.Nickel-chromium alloy Inconel 718 is usually used in aircraft sheet metal parts and liquid rocket engine.Although this kind of material to withstand high temperatures, the cooling speed is very slow.

To understand Inconel 718 and copper alloy processing capacity, the measure interface, thermal properties, the researchers used the laser engineering net shaping (LENS ™) manufacture bimetallic structure, this is a kind of available on the market of material manufacturing technology, aided design (CAD) entity model, through the metal powder injection produced by focusing of high power laser beam in the molten pool.LENS similar to selective laser sintering, but metal powder will only apply to add material to the parts of the situation at that time.

Presumably, the two airlines alloy additive joined to form the unique double metal structure, compared with the Inconel 718 alloy, the thermal physical properties improved.Researchers have used two methods: direct deposit on the inconel 718 GRCop - 84 and two kinds of alloy into classification.They found that the copper is added in the 3 d printing process, the parts can be 250% faster cooling, this can eventually translate into higher fuel efficiency and longer engine life.Has design component layers and tailor the thermal performance of the structure for the next generation of aerospace structure has developed a variety of materials, the possibility of metal additives.

Bandyopadhyay said: "many materials increase material manufacturing has opened the door for so many possible creation."It makes us become more bold, more creative."

The study by the joint space technology innovation center, the national science foundation and NASA's Marshall space flight center.

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