Scientists at Texas A&M University, in collaboration with the US Air Force Research Laboratory, presented
“The strongest and relatively cheapest steel isMartens. Before that, we did not know how to use it for printing. Now there is a frame that allows you to turn solid steel into any geometric shape, ”the researchers noted.
Despite the fact that the procedure was initiallydeveloped for martensitic steels, A&M researchers say they have made their technology scalable. The same method can be used to create complex objects from other metals and alloys.
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Scientists have already used for their experimentsan existing mathematical model inspired by welding; so they wanted to predict how the martensitic steel powder layer would change at different settings for the speed and power of the laser. By fixing the type and number of defects, they were able to slightly modify the existing structure so that the structures improved.
After several iterations, their geometric shapes began to print without defects. Researchers noted that the model can be improved in the future.
“Testing the full range of featureslaser installations to assess which of them can lead to defects are extremely laborious and sometimes even impractical, the researchers note. By combining experiments and modeling, we were able to develop a simple, quick, step-by-step procedure with which you can determine which setting is best for three-dimensional printing of martensitic steels. "