Scientists have increased the strength of titanium and stainless steel products by 7 times

Scientists from the National Research Technological University "MISiS" together with the French

colleagues managed to find the parameters of metal processing, allowing to combine the method of hot isostatic pressing (HIP) and the technology of cold gas-dynamic spraying.

According to the authors, they combined the effect of both methods and thereby dramatically increased the useful characteristics of the resulting materials.

We have applied the GUI for materials that were not previouslywere recommended for such processing, since they have a loose surface due to the presence of open pores. In a special way, by applying a thin layer of the same metal to a loose product, we got a kind of a sealed capsule that allows us to successfully use the HIP. Thanks to this treatment, the porosity has more than halved, the compressive strength has increased by 25 percent, and most importantly, the tensile strength has increased many times over.

Vladimir Cheverikin, Head of the Program "Additive Technologies for the iPhD Manufacturing Industry", NUST MISIS

In particular, the tensile strength of stainlesssteel and pure titanium increased approximately sevenfold. The most impressive results were obtained for the Ti6AL4V titanium-aluminum alloy, whose tensile strength increased 28 times. The improvement in mechanical properties is provided by diffusion of the material and changes in its microstructure, the scientists explained.

Now, based on the results of the work, a group of scientists plans to develop new materials for the medical industry.

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